<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0256-7024</journal-id>
<journal-title><![CDATA[Revista Geológica de América Central]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Geol. Amér. Central]]></abbrev-journal-title>
<issn>0256-7024</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0256-70242016000200115</article-id>
<article-id pub-id-type="doi">10.15517/rgac.v55i0.27067</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Litoestratigrafía del grupo Tecocoyunca (jurásico medio) en el área del río Ñumi (cercanías de Tlaxiaco), Oaxaca y consideraciones sobre la distribución regional de su biota]]></article-title>
<article-title xml:lang="en"><![CDATA[Lithostratigraphy of the Tecocoyunca group (middle Jurassic) in the Ñumí river area (vicinity of Tlaxiaco), Oaxaca, and considerations about the regional distribution of the biota]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrasco-Ramírez]]></surname>
<given-names><![CDATA[Raúl S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferrusquía-Villafranca]]></surname>
<given-names><![CDATA[Ismael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Buitrón-Sánchez]]></surname>
<given-names><![CDATA[Blanca E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz-González]]></surname>
<given-names><![CDATA[José E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Mexico  ]]></institution>
<addr-line><![CDATA[ Nuevo León]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[Coyoacán México, D.F.]]></addr-line>
<country>MX</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<numero>55</numero>
<fpage>115</fpage>
<lpage>136</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0256-70242016000200115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0256-70242016000200115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0256-70242016000200115&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:La litoestratigrafía jurásica de la Región Mixteca es relativamente bien conocida, sin embargo, el esquema en que se basa incluye descripciones formacionales un tanto deficientes (e.g. vaguedad, caracterización por contenido fósil, delimitación cartográfica insuficiente). Con el propósito de contribuir a subsanar esta deficiencia, realizamos un estudio detallado del área Ñumí, cercanías de Tlaxiaco, donde las unidades mesojurásicas integrantes del Grupo Tecocoyunca despliegan sus atributos, permitiendo así suplementar las descripciones formacionales. Se encontró que el Grupo Tecocoyunca localmente incluye en la parte inferior a las Formaciones Asociadas Zorrillo/Taberna (Bajociano Temprano-Tardío inicial), constituidas por ~287 m de limolitas carbonosas, lodolitas y subarcosas, porta pelecípodos y plantas terrestres, así como dos zonas de carbón; se les interpreta como parte de un complejo deltaico. Estas formaciones subyacen en concordancia a la Formación Simón (Batoniano Medio-Tardío), integrada por ~270 m de subarcosas y limolitas dispuestas en estratos delgados y gruesos; se le considera un depósito transicional. Esta unidad subyace en concordancia a la Formación Otatera (Batoniano tardío), consiste en ~170 m de coquinas de pelecípodos con intercalaciones de estratos calcáreos de intraespatita; se le interpreta como un depósito nerítico somero, con un componente subordinado de playa. Esta unidad subyace concordantemente a la Formación Yucuñuti (Calloviano Medio), constituida por ~118 m de areniscas finas, coquinas, limolitas y biomicritas que portan pelecípodos y gasterópodos; se le interpreta como un depósito transicional a nerítico somero. A esta unidad le sobreyace en discordancia la Caliza con "Cidaris" del Oxfordiano, que no forma parte de este grupo. La biota del Grupo Tecocoyunca incluye una típica paleoflora mesojurásica, cuyos taxa se encuentran ampliamente distribuidos en la región centro-meridional de México y septentrional de Centroamérica; así como una paleofauna integrada por moluscos mesojurásicos comunes en la Región Mixteca. La biota en conjunto denota un clima regional cálido y húmedo. Finalmente, se considera que la descripción detallada de las formaciones que constituyen al Grupo Tecocoyunca, es de facto un avance en la redefinición de las unidades mesojurásicas de la Región Mixteca.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:The Jurassic lithostratigraphy of the Mixteca Region is relatively well known however, the system on which it is based includes somewhat deficient formational descriptions (e.g. vagueness, characterization by fossil content, insufficient cartographic discrimination). In order to contribute to correct such deficiency, we undertook a detailed study of the Río Ñumí area, vicinity of Tlaxiaco, where the Middle Jurassic units that make up the Tecocoyunca Group display their attributes, thus allowing to supplement the formational descriptions. It was found that locally, the Tecocoyunca Group includes in the lower part the associated Formations Zorrillo/Taberna (Early to Late Bajocian), consisting of ~287 m of carbonaceous siltstone, mudstone and subarkosic very fine-grained sandstone and siltstone; this composite unit bears pelecypods and continental plants, as well as two carbon zones; it is interpreted that they were part of a delta complex. These associated formations conformably underlie the Simón Formation (Middle-Late Bathonian), it consists of ~270 m of subarkoses and siltstone set in thin to thick strata; it is interpreted as a transitional deposit. This unit concordantly underlies the Otatera Formation (Late Bathonian), consisting of ~170 m of pelecypod coquina with intercalations of spathitic limestone strata; it is regarded as shallow neritic deposit with a subordinate beach component. This unit concordantly underlies the Yucuñuti Formation (Middle Callovian), constituted by ~118 m of fine-grained sandstone, coquina and biomicrite that bear pelecypods and gastropods; it is interpreted as a transitional to shallow neritic deposit. This unit is unconformably overlain the Oxfordian Limestone with "Cidaris", which is no part of this group. The Tecocoyunca Group Biota includes a typical Middle Jurassic flora, whose taxa are widely distributed in Mexico's central and southern regions, as well as in northern Central America; and a paleofauna constituted by Middle Jurassic mollusks common throughout the Mixteca Region. The biota as a whole discloses a warm and humid climate regime. Finally, it is thought that the detailed descriptions of the formations making up the Tecocoyunca Group are in fact an advance in the redefinition of the Mixtec Region's Middle Jurassic units.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[Oaxaca]]></kwd>
<kwd lng="en"><![CDATA[Middle Jurassic]]></kwd>
<kwd lng="en"><![CDATA[Tecocoyunca Group]]></kwd>
<kwd lng="en"><![CDATA[Lithostratigraphy]]></kwd>
<kwd lng="en"><![CDATA[Paleontology]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="es"><![CDATA[Oaxaca]]></kwd>
<kwd lng="es"><![CDATA[Jurásico Medio]]></kwd>
<kwd lng="es"><![CDATA[Grupo Tecocoyunca]]></kwd>
<kwd lng="es"><![CDATA[Litostratigrafía]]></kwd>
<kwd lng="es"><![CDATA[Paleontología]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Pelecípodos del Jurásico del noreste de Oaxaca y noroeste de Guerrero.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alencáster]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paleontología Mexicana]]></source>
<year>1963</year>
<volume>15</volume>
<page-range>1-52</page-range><publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Fauna del Jurásico Superior de la región de Petlalcingo, estado de Puebla]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alencáster De Cserna]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Buitrón]]></surname>
<given-names><![CDATA[B. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paleontología Mexicana]]></source>
<year>1965</year>
<volume>21</volume>
<page-range>1-53</page-range><publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Flora fósil de la región de Yucuquimi, Oaxaca (Formación Rosario)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arambarri]]></surname>
<given-names><![CDATA[R. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Soc. Mexicana de Paleontol]]></source>
<year>1987</year>
<volume>1</volume>
<page-range>55-71</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Piazopteris branneri (White) Lorch, helecho del Jurásico Inferior-Medio de Cuba.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Areces-Mallea]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Soc. Mexicana de Paleontol]]></source>
<year>1990</year>
<volume>3</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>26-40</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Piazopteris branneri from the Lower Jurassic, Egypt.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ash]]></surname>
<given-names><![CDATA[S. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Paleobotany and Palynology]]></source>
<year>1972</year>
<volume>13</volume>
<page-range>147-54</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Código estratigráfico norteamericano]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barragán]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Campos-Madrigal]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Ferrusquía-Villafranca]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[López-Palomino]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Tolson]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Inst. Geol]]></source>
<year>2010</year>
<volume>117</volume>
<page-range>1-64</page-range><publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Exploration of certain iron ore and coal deposits in the state of Oaxaca]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Birkinbine]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Transactions of the American Institute of Mining and Metallurgical Engineers]]></source>
<year>1911</year>
<volume>12</volume>
<page-range>166-8</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boggs]]></surname>
<given-names><![CDATA[S. Jr.]]></given-names>
</name>
</person-group>
<source><![CDATA[Petrology of sedimentary rocks]]></source>
<year>2009</year>
<page-range>600</page-range><publisher-loc><![CDATA[Cambridge, U.S.A. ]]></publisher-loc>
<publisher-name><![CDATA[Cambrige University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Observations on the jaw of a fossils mammiferous animal, found in the Stonestfield Slate]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Broderip]]></surname>
<given-names><![CDATA[W. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Zool. J]]></source>
<year>1828</year>
<volume>3</volume>
<page-range>408-12</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Cefalópodos del Jurásico Medio de Oaxaca y Guerrero]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Burckhardt]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Inst. Geol. de México]]></source>
<year>1927</year>
<volume>47</volume>
<page-range>2-108</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carrasco-Ramírez]]></surname>
<given-names><![CDATA[R. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bioestratigrafía de amonitas (CephalopodaAmmonoidea) del Bajociano y Calloviano de una porción de la Región Mixteca de Oaxaca]]></source>
<year>1999</year>
<page-range>91</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Los ammonites del Calloviano de la Región Mixteca, Oaxaca, México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carrasco-Ramírez]]></surname>
<given-names><![CDATA[R. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Inst. Geol. de México]]></source>
<year>2003</year>
<volume>56</volume>
<page-range>42-55</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Fauna fósil de la Sierra de Catorce, San Luis Potosí]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castillo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Aguilera]]></surname>
<given-names><![CDATA[J. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Comisión Geológica de México (Inst. Geol. de México)]]></source>
<year>1895</year>
<volume>1</volume>
<page-range>1-55</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cortés-Obregón]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Torón]]></surname>
<given-names><![CDATA[V. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[B. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[L. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gamboa]]></surname>
<given-names><![CDATA[A. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cruz]]></surname>
<given-names><![CDATA[C. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Puebla]]></surname>
<given-names><![CDATA[P. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[La cuenca carbonífera de la Mixteca]]></source>
<year>1957</year>
<page-range>191</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Banco de México, S.A.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Paleontology of the Malone Jurassic formation of Texas]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cragin]]></surname>
<given-names><![CDATA[F. W.]]></given-names>
</name>
</person-group>
<source><![CDATA[USGS Bull]]></source>
<year>1905</year>
<volume>266</volume>
<page-range>52-172</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Hunting fossils plants in Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delevoryas]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Discovery (Connecticut)]]></source>
<year>1966</year>
<volume>2</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>7-13</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delevoryas]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Jurassic Paleobotany in Oaxaca]]></source>
<year>1968</year>
<conf-name><![CDATA[ Geol. Amer. Soc. Guidebook for the Annual Meeting]]></conf-name>
<conf-loc>Mexico City </conf-loc>
<page-range>10-4</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Glossopterid leaves from the Middle Jurassic of Oaxaca, Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delevoryas]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Science]]></source>
<year>1969</year>
<volume>165</volume>
<page-range>895-6</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Investigations of North America Cycadeoids; Williamsonian cones from the Jurassic of Oaxaca, Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delevoryas]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Palaeobotany and Palynology]]></source>
<year>1973</year>
<volume>15</volume>
<page-range>27-42</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[An unusual fossil fructification from the Jurassic of Oaxaca, Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delevoryas]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Gould]]></surname>
<given-names><![CDATA[R. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Amer. J]]></source>
<year>1971</year>
<volume>58</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>616-20</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Mexiglossa varia Gen. et sp. nov.; a new genus of glossopterid leaves from the Middle Jurassic of Oaxaca, Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delevoryas]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Pearson]]></surname>
<given-names><![CDATA[C. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Palaeontographica]]></source>
<year>1975</year>
<volume>154</volume>
<page-range>114-20</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Jurassic plants from the department of Francisco Morazán, central Honduras]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delevoryas]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Srivastava]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Palaeobotany and Palynology]]></source>
<year>1981</year>
<volume>34</volume>
<page-range>345-7</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[D´Orbigny]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Prodrome de paléontologie stratigraphique universelle des mollusques et rayonées: faisant suite au Cours élémentaire de paléontologie et de géologie stratigraphiques]]></source>
<year>1850</year>
<volume>2</volume>
<page-range>444</page-range><publisher-loc><![CDATA[París ]]></publisher-loc>
<publisher-name><![CDATA[V. MASSON]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Erben]]></surname>
<given-names><![CDATA[H. K.]]></given-names>
</name>
</person-group>
<source><![CDATA[El Jurásico Medio y el Calloviano de México]]></source>
<year>1956</year>
<conf-name><![CDATA[ Congreso Geológico Internacional, 20ª]]></conf-name>
<conf-loc> </conf-loc>
<page-range>140</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Jurassic (Liassic) flora of the Rajmahal Hills.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Feistmantel]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paleontologia Indica]]></source>
<year>1877</year>
<volume>2</volume>
<page-range>3-80</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Versteinerungen aus der Mexicanischen Jura und Kreide Formation]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Felix]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Palaeontographica]]></source>
<year>1891</year>
<volume>37</volume>
<page-range>140-99</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Finkl]]></surname>
<given-names><![CDATA[C. W. JR.]]></given-names>
</name>
</person-group>
<source><![CDATA[The encyclopedia of field and general geology]]></source>
<year>1988</year>
<page-range>911</page-range><publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[Van Nostrand Reinhold]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Folk]]></surname>
<given-names><![CDATA[R. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Petrology of sedimentary rocks]]></source>
<year>1974</year>
<page-range>190</page-range><publisher-loc><![CDATA[EUA ]]></publisher-loc>
<publisher-name><![CDATA[Hemphill Publishing Company]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Geología del noreste de Guerrero]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guzmán]]></surname>
<given-names><![CDATA[E. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Asoc. Mexicana de Geólogos Petroleros]]></source>
<year>1950</year>
<volume>2</volume>
<page-range>95-156</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Depositional facies of high-energy beach to offshore sequence: Comparison with low-energy sequence]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Howard]]></surname>
<given-names><![CDATA[J. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Reineck]]></surname>
<given-names><![CDATA[H.E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Amer. Assoc. of Petroleum Geologists Bull]]></source>
<year>1981</year>
<volume>65</volume>
<page-range>807-30</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="">
<collab>INEGI (Instituto Nacional De Estadística Geográfica e Informática)</collab>
<source><![CDATA[Carta Geológica]]></source>
<year>1994</year>
</nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="">
<collab>INEGI (Instituto Nacional De Estadística Geográfica e Informática)</collab>
<source><![CDATA[Carta Topográfica]]></source>
<year>2000</year>
</nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Revisión de la Estratigrafía y potencial petrolero de la Cuenca de Tlaxiaco]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[López-Ticha]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Asoc. Mexicana de Geólogos Petroleros]]></source>
<year>1985</year>
<volume>37</volume>
<page-range>49-92</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[On the fossil and zoology of the rocks associated with the coal of Australia]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[McCoy]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Annals and Magazine of Nat. Hist]]></source>
<year>1847</year>
<volume>20</volume>
<page-range>145-57</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Bosquejo paleogeográfico y tectónico del Sur de México durante el Mesozoico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Meneses-Rocha]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Monroy-Audelo]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Gómez-Chavarría]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Asoc. Mexicana de Geólogos Petroleros]]></source>
<year>1994</year>
<volume>44</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>18-45</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[JurassicCretaceous paleogeographic evolution of the northern Mixteca terrane, southern Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morán-Zenteno]]></surname>
<given-names><![CDATA[D. J]]></given-names>
</name>
<name>
<surname><![CDATA[Caballero]]></surname>
<given-names><![CDATA[M. C. I]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[R. G]]></given-names>
</name>
<name>
<surname><![CDATA[Ortega]]></surname>
<given-names><![CDATA[G. B.]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[T. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geofísica Int]]></source>
<year>1993</year>
<volume>32</volume>
<page-range>453-73</page-range></nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Memoir to Illustrate a Geological Map of Cutch (Grant, C. W.)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morris]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Transactions of the Geol. Soc]]></source>
<year>1840</year>
<volume>5</volume>
<page-range>289-329</page-range></nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[North American Stratigraphic Code]]></article-title>
<collab>NACSN (North American Commission on Stratigraphic Nomenclature)</collab>
<source><![CDATA[Bull. Amer. Assoc. of Petroleum Geologist]]></source>
<year>2005</year>
<volume>89</volume>
<page-range>1547-91</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Variación intraespecífica en Parathyridina mexicana n. sp. Terebratúlido del Oxfordiano de México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ochoterena-Fuentes]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paleontol. Mexicana]]></source>
<year>1960</year>
<volume>9</volume>
<page-range>1-40</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Revaluación geoeconómica de los depósitos de carbón del área de Tezoatlán, Oaxaca]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ojeda-Rivera]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Geomimet]]></source>
<year>1975</year>
<volume>79</volume>
<page-range>21-40</page-range></nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estratigrafía del Complejo Acatlán en la Mixteca Baja, estados de Puebla y Oaxaca]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ortega-Gutiérrez]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Inst. Geol]]></source>
<year>1978</year>
<volume>2</volume>
<page-range>112-31</page-range></nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Clasificación del área foliar de las gimnospermas fósiles de la zona norte de Oaxaca, México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ortiz-Martínez]]></surname>
<given-names><![CDATA[E. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Velazco De León]]></surname>
<given-names><![CDATA[M. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Salgado-Ugarte]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Mexicana de Cien. Geol]]></source>
<year>2013</year>
<volume>20</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>150-8</page-range></nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pearson]]></surname>
<given-names><![CDATA[C. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Middle Jurassic flora of Oaxaca, Mexico]]></source>
<year>1976</year>
<page-range>145</page-range><publisher-loc><![CDATA[EUA ]]></publisher-loc>
<publisher-name><![CDATA[University of Texas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The Middle Jurassic of Oaxaca, Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pearson]]></surname>
<given-names><![CDATA[C. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Delevoryas]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Palaeontographica]]></source>
<year>1982</year>
<volume>180</volume>
<page-range>82-119</page-range></nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez-Ibargüengoitia]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Hokuto]]></surname>
<given-names><![CDATA[C. A.]]></given-names>
</name>
<name>
<surname><![CDATA[De Cserna]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reconocimiento geológico del área Petlalcingo-Santa Cruz, Municipio de Acatlán, estado de Puebla]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[De Cserna]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Hokuto-Castillo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estratigrafía y paleontología del Jurásico Superior del estado de Puebla]]></source>
<year>1965</year>
<page-range>22</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Inst. Geol.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B46">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estudio de unos ejemplares de carbón mineral procedentes del Distrito de Tlaxiaco en el Estado de Oaxaca]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Anales del Ministerio de Fomento de la República Mexicana]]></source>
<year>1882</year>
<volume>7</volume>
<page-range>108-13</page-range></nlm-citation>
</ref>
<ref id="B47">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reading]]></surname>
<given-names><![CDATA[H. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Sedimentary Environments: Processes, Facies and Stratigraphy]]></source>
<year>1996</year>
<edition>3a</edition>
<page-range>704</page-range><publisher-loc><![CDATA[EUA ]]></publisher-loc>
<publisher-name><![CDATA[WileyBlackwell]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B48">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reineck]]></surname>
<given-names><![CDATA[H. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[I. B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Depositional Sedimentary Environments]]></source>
<year>1980</year>
<page-range>549</page-range><publisher-loc><![CDATA[EUA ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B49">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The Bajocian (Jurassic) ammonite fauna of Oaxaca, Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sandoval]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Westerman]]></surname>
<given-names><![CDATA[G. E. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Paleontol]]></source>
<year>1986</year>
<volume>60</volume>
<page-range>1220-71</page-range></nlm-citation>
</ref>
<ref id="B50">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Paléontologie française ou description des fossiles de la France; plantes jurassiques]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Saporta]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paris, Masson]]></source>
<year>1891</year>
<volume>4</volume>
<page-range>547</page-range></nlm-citation>
</ref>
<ref id="B51">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The Jurassic plant fossils of the Lovisato Collection: preliminary notes]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Scanu]]></surname>
<given-names><![CDATA[G. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Kustatscher]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Pittau]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bollettino della Società Paleontologica Italiana]]></source>
<year>2012</year>
<volume>51</volume>
<page-range>71-84</page-range></nlm-citation>
</ref>
<ref id="B52">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Scanu]]></surname>
<given-names><![CDATA[G. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Kustatscher]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Pittau]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Jurassic plants of Sardinia: An overview with new data]]></source>
<year>2013</year>
<conf-name><![CDATA[ Giornate di Paleontologia, XIII]]></conf-name>
<conf-loc> </conf-loc>
<page-range>1-2</page-range></nlm-citation>
</ref>
<ref id="B53">
<nlm-citation citation-type="book">
<collab>SGM (Servicio Geológico Mexicano)</collab>
<source><![CDATA[Mapa escala 1:50,000, Carta Geológico]]></source>
<year>2000</year>
<publisher-name><![CDATA[Minera Tlaxiaco]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B54">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Plantas fósiles del Jurásico Medio de la región de Tezoatlán, estado de Oaxaca]]></source>
<year>1970</year>
<page-range>129-53</page-range><publisher-name><![CDATA[Soc. Geol. Mexicana]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B55">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Paleobotánica del Jurásico de México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paleontol. Mexicana]]></source>
<year>1978</year>
<month>a</month>
<volume>44</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-13</page-range></nlm-citation>
</ref>
<ref id="B56">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Plantas del Jurásico medio del sur de Puebla y noroeste de Oaxaca]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paleontol. Mexicana]]></source>
<year>1978</year>
<month>b</month>
<volume>44</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>27-56</page-range></nlm-citation>
</ref>
<ref id="B57">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Revisión taxonómica y tipificación de las plantas Jurásicas colectadas y estudiadas por Wieland (1914) en la región de El Consuelo, Oaxaca]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paleontol. Mexicana]]></source>
<year>1984</year>
<volume>49</volume>
<page-range>104</page-range></nlm-citation>
</ref>
<ref id="B58">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Flora Fósil del Jurásico Medio de la Región de Chalcatongo en el suroeste del estado de Oaxaca]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Soc. Mexicana de Paleontol]]></source>
<year>1990</year>
<volume>2</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>7-15</page-range></nlm-citation>
</ref>
<ref id="B59">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[González-Gallardo]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Tafoflórula jurásica de la región de Chilpancingo-Tlapa, en el noreste del estado de Guerrero, México]]></source>
<year>1984</year>
<month>a</month>
<conf-name><![CDATA[ IIICongreso Latinoamericano de Paleontología]]></conf-name>
<conf-loc>México D.F </conf-loc>
<page-range>200-6</page-range></nlm-citation>
</ref>
<ref id="B60">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Algunas Bennetittales (Cycadophyta) y Coniferales (Coniferophyta) del Jurásico Medio del área de Cualac, Guerrero]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[GonzálezGallardo]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Inst. Geol]]></source>
<year>1984</year>
<month>b</month>
<volume>7</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>244-8</page-range></nlm-citation>
</ref>
<ref id="B61">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Buitrón]]></surname>
<given-names><![CDATA[B. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Carrasco]]></surname>
<given-names><![CDATA[R. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bioestratigrafía del Jurásico de la región de Tlaxiaco, Oaxaca]]></source>
<year>1986</year>
<month>a</month>
<conf-name><![CDATA[ VIIIConvención Geológica Nacional]]></conf-name>
<conf-loc>México D.F </conf-loc>
<page-range>84</page-range></nlm-citation>
</ref>
<ref id="B62">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Buitrón]]></surname>
<given-names><![CDATA[B. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Carrasco]]></surname>
<given-names><![CDATA[R. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Consideraciones paleoecológicas de las formaciones Zorrillo-Taberna (?AalenianoBatoniano) en la región de Tlaxiaco, Oaxaca]]></source>
<year>1986</year>
<month>b</month>
<conf-name><![CDATA[ VIColoquio sobre Paleobotánica y Palinología]]></conf-name>
<conf-loc>México D.F </conf-loc>
</nlm-citation>
</ref>
<ref id="B63">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Flora Jurásica de San Andrés Yutatío en el noroeste de Oaxaca]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva-Pineda]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Arambarri]]></surname>
<given-names><![CDATA[R G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Soc. Geol. Mexicana]]></source>
<year>1991</year>
<volume>4</volume>
<page-range>57-61</page-range></nlm-citation>
</ref>
<ref id="B64">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stach]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Coal Petrology]]></source>
<year>1975</year>
<page-range>428</page-range><publisher-loc><![CDATA[Berlin ]]></publisher-loc>
<publisher-name><![CDATA[Gebrüder Borntraeger]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B65">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tatsch]]></surname>
<given-names><![CDATA[J.H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Coal Deposits]]></source>
<year>1980</year>
<page-range>590</page-range><publisher-loc><![CDATA[Massachusetts ]]></publisher-loc>
<publisher-name><![CDATA[Tatsch Associates]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B66">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The Jurassic flora of the Cleveland District of Yorkshire]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Thomas]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Geol. Soc. of London]]></source>
<year>1911</year>
<volume>69</volume>
<page-range>223-51</page-range></nlm-citation>
</ref>
<ref id="B67">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Jurassic floras of the URSS]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vakhrameev]]></surname>
<given-names><![CDATA[V. A]]></given-names>
</name>
</person-group>
<source><![CDATA[Birbal Sahni Institute of Palaeobotany, Lucknow]]></source>
<year>1956</year>
<volume>14</volume>
<numero>1-13</numero>
<issue>1-13</issue>
<page-range>118-23</page-range></nlm-citation>
</ref>
<ref id="B68">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vakhrameev]]></surname>
<given-names><![CDATA[V. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lebedev]]></surname>
<given-names><![CDATA[E. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Jurassic floras and climate of Pacific URSS]]></source>
<year>1985</year>
<page-range>7</page-range></nlm-citation>
</ref>
<ref id="B69">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Phlebopteris branneri from the Western desert of Egypt]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Webber]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Annals and Magazine of the Natural History]]></source>
<year>1961</year>
<volume>4</volume>
<numero>37</numero>
<issue>37</issue>
<page-range>7-10</page-range></nlm-citation>
</ref>
<ref id="B70">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The Upper Bajocian and Lower Bathonian (Jurassic) ammonite Faunas of Oaxaca, Mexico and west Thetyan affinities]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Westermann]]></surname>
<given-names><![CDATA[G. E. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Paleontología Mexicana]]></source>
<year>1983</year>
<volume>46</volume>
<page-range>1-63</page-range><publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geología]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B71">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Westermann]]></surname>
<given-names><![CDATA[G. E. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Late Bajocian Duashnoceras association (Jurassic Ammonitina) of Mixtepec in Oaxaca, México]]></source>
<year>1984</year>
<conf-name><![CDATA[ Congreso Latinoamericano de Paleontología]]></conf-name>
<conf-loc>Oaxtepec, Morelos, México </conf-loc>
<page-range>192-8</page-range></nlm-citation>
</ref>
<ref id="B72">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The Williamsonians of the Mixteca Alta]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wieland]]></surname>
<given-names><![CDATA[G. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Botanical Gazette]]></source>
<year>1909</year>
<volume>48</volume>
<page-range>427-11</page-range></nlm-citation>
</ref>
<ref id="B73">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[La flora liásica de la Mixteca Alta]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wieland]]></surname>
<given-names><![CDATA[G. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Inst. Geol. de México]]></source>
<year>1916</year>
<volume>31</volume>
<page-range>1-162</page-range></nlm-citation>
</ref>
<ref id="B74">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The El Consuelo Cycadeoids]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wieland]]></surname>
<given-names><![CDATA[G. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Botanical Gazette]]></source>
<year>1926</year>
<volume>81</volume>
<page-range>72-86</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
