<?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>S0256-70242020000200083</article-id>
<article-id pub-id-type="doi">10.15517/rgac.v0i63.43868</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Dactyloidites ottoi en depósitos marinos someros de la formación Coris, Mioceno, Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Dactyloidites ottoi in shallow marine deposits of the Coris formation, Miocene, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar]]></surname>
<given-names><![CDATA[Teresita]]></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 (CICG) ]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</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>83</fpage>
<lpage>93</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0256-70242020000200083&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0256-70242020000200083&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0256-70242020000200083&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Las trazas de Dactyloidites ottoi, asociadas a facies de areniscas silíceas, de grano medio, limpias, con laminaciones paralelas planas y curvas y laminación inclinada HCS se desarrollaron en ambientes someros (upper shoreface), de la Formación Coris (Mioceno). Fueron condiciones de alta energía generadas por olas, tormentas, corrientes y mareas. Sedimentación episódica con eventos erosivos de alta energía por tormentas y depositación de baja energía con aporte de materia orgánica favorecieron el retrabajo del sedimento. Estos icnofósiles no son frecuentes en el registro sedimentario y no habían sido reportados en Costa Rica. Están constituidos por varios elementos elongados que salen radialmente de un conducto central y conforman series de galerías superpuestas en forma de abanico o roseta. Aunque no se conoce el productor, diferentes estudios coinciden en que es una traza de alimentación tipo fodicnia producida por un organismo vermiforme que forma parte de la icnofacies Cruziana.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Dactyloidites ottoi traces associated with medium grained, mature, siliceous sandstone facies, with planar and curved parallel lamination and HCS cross laminations were developed in shallow marine environments (upper shoreface) of the Coris Formation (Miocene). High-energy environmental conditions were caused by waves, storms, tides and currents. Episodic sedimentation with high-energy erosive events caused by storms alternating with low-energy deposition with organic matter input favored sediment rework by organisms. These ichnofossils are infrequent in the sedimentary record and they had not previously been reported in Costa Rica. They are constituted by elongated elements which radiate from a central shaft and create a series of rosetted or fan-shaped tiered galleries. The organism that created these structures is yet unknown, however, several studies coincide that it must have been a feeding fodichnia trace produced by a worm-like organism which is part of the Cruziana Icnofacies.]]></p></abstract>
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<kwd lng="es"><![CDATA[trazas fósiles]]></kwd>
<kwd lng="es"><![CDATA[paleoecología]]></kwd>
<kwd lng="es"><![CDATA[ambiente somero]]></kwd>
<kwd lng="es"><![CDATA[fodicnia]]></kwd>
<kwd lng="es"><![CDATA[Formación Coris]]></kwd>
<kwd lng="en"><![CDATA[Trace fossils]]></kwd>
<kwd lng="en"><![CDATA[paleoecology]]></kwd>
<kwd lng="en"><![CDATA[upper shoreface]]></kwd>
<kwd lng="en"><![CDATA[fodichnia]]></kwd>
<kwd lng="en"><![CDATA[Coris Formation]]></kwd>
</kwd-group>
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