<?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>S0256-70242020000200115</article-id>
<article-id pub-id-type="doi">10.15517/rgac.v0i63.44028</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Implicaciones neotectónicas y estructurales con base en paleosismología del sector sur de la Zona Transpresiva de Cartago, Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Neotectonic and structural implications based on paleoseismology of the southern sector of the Cartago Transpression Zone, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montero-Pohly]]></surname>
<given-names><![CDATA[Walter]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Obando-Acuña]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Argüello-Sáenz]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Díaz]]></surname>
<given-names><![CDATA[José J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Quesada]]></surname>
<given-names><![CDATA[Wilfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigaciones en Ciencias Geológicas Ciudad Universitaria Rodrigo Facio]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Escuela Centroamericana de Geología Ciudad Universitaria Rodrigo Facio]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Complutense Facultad de Ciencias Geológicas IGEO (CSIC, UCM), Ciudad Universitaria s/n]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<numero>63</numero>
<fpage>115</fpage>
<lpage>146</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0256-70242020000200115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0256-70242020000200115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0256-70242020000200115&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo se presentan los principales resultados de los estudios de paleosismología realizados en trincheras excavadas en la falla Cocorí, ubicada en el sector sur de la Zona Transpresiva de Cartago, en las cuales se determinó por medio de dataciones Carbono 14, deformaciones anteriores a 28000 años y posteriores a 10000 años (final del Pleistoceno Superior y el Holoceno). La deformación observada corresponde con fallas inversas con componente de rumbo, presumiblemente izquierda. También se observó deformación plástica, donde los anticlinales muestran vergencia al sur. Dos de las fallas determinadas tienen desplazamientos del orden métrico, y se definieron varios plegamientos con amplitudes cercanas al metro. Sin embargo, el bajo ángulo de las fallas o las características dúctiles de los materiales involucrados en la deformación no favorecieron encontrar evidencia estratigráfica de rupturas cosísmicas superficiales. Esto limitó poder determinar la ocurrencia de paleosismos dentro de un rango temporal apropiado. Un modelo neotectónico esquemático incorporando dos pliegues por flexión de falla (fault-bend folds), de rumbo cercano al este-oeste, permiten explicar las características geomórficas y estructurales de la falla Cocorí.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this work we present the principal results of a paleoseismological study performed in trenches dug across the Cocorí fault, located at the southern part of the Cartago Transpression Zone. Based on radiocarbon dating we define tectonic deformations occurred before the last 28000 years and after 10000 years (last part of the Upper Pleistocene and Holocene). The tectonic deformations observed in the trenches are thrust faults with a strike-slip component, probably sinistral. We also defined plastic deformation, where the anticlines show south vergence. Two of the faults had metric displacements and various folds had nearly metric amplitudes. However, the low angle of the faults and the ductile behavior of the materials involved in the deformation, do not allowed us to find evidence of coseismic surface ruptures. This limitation implied that we do not being able to temporally bracket the occurrence of any paleoearthquake. A schematic neotectonic model of two fault-bend folds, trending nearly east-west, allows us to explain the geomorphological characteristics of the southern sector of the Cartago Transpression Zone and the structural observations found in the different trenches.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[geomorfología tectónica]]></kwd>
<kwd lng="es"><![CDATA[Cinturón Deformado del Centro de Costa Rica]]></kwd>
<kwd lng="es"><![CDATA[sistema de falla Aguacaliente]]></kwd>
<kwd lng="es"><![CDATA[falla Cocorí]]></kwd>
<kwd lng="es"><![CDATA[pliegue por flexión de falla]]></kwd>
<kwd lng="en"><![CDATA[Tectonic geomorphology]]></kwd>
<kwd lng="en"><![CDATA[Central Costa Rica Deformed Belt]]></kwd>
<kwd lng="en"><![CDATA[Aguacaliente fault System]]></kwd>
<kwd lng="en"><![CDATA[Cocorí Fault]]></kwd>
<kwd lng="en"><![CDATA[Fault-bend fold]]></kwd>
</kwd-group>
</article-meta>
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