<?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>0120-0283</journal-id>
<journal-title><![CDATA[Boletín de Geología]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. geol.]]></abbrev-journal-title>
<issn>0120-0283</issn>
<publisher>
<publisher-name><![CDATA[Universidad Industrial de Santander]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-02832024000100047</article-id>
<article-id pub-id-type="doi">10.18273/revbol.v46n1-2024003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Identificación de cortes en sección delgada de las especies Clavihedbergella simplex y Clavihedbergella moremani presentes en rocas Cretácicas provenientes de la parte central del Valle Medio del Magdalena, Colombia]]></article-title>
<article-title xml:lang="en"><![CDATA[Thin section identification of Clavihedbergella simplex and Clavihedbergella moremani species present in Cretaceous rocks from the central part of Middle Magdalena Valley, Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz-Suárez]]></surname>
<given-names><![CDATA[Camila M.M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Quiñónez]]></surname>
<given-names><![CDATA[Carlos Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia Departamento de Geociencias ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2024</year>
</pub-date>
<volume>46</volume>
<numero>1</numero>
<fpage>47</fpage>
<lpage>58</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-02832024000100047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-02832024000100047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-02832024000100047&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El estudio de foraminíferos planctónicos usando secciones delgadas es relativamente reciente y en el caso de las especies Clavihedbergella simplex y Clavihedbergella moremani es un método que facilita su observación e identificación, más aún en rocas Cretácicas colombianas donde el método de preparación tradicional con peróxido no es efectivo. Este estudio hace una descripción taxonómica de dichas especies a partir de ejemplares en secciones delgadas e identifica sus respectivas ocurrencias a lo largo de rocas Cretácicas en un pozo ubicado en la parte central del Valle Medio del Magdalena, Colombia. Las directrices presentadas en este estudio validan la utilidad de este método de investigación y facilitan la identificación de estas dos especies en sección delgada.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The planktonic foraminifera study using thin sections is relatively recent and in the case of Clavihedbergella simplex and Clavihedbergella moremani species is a method that enhances their observation and identification, even more in cretaceous colombian rocks where traditional peroxide preparation method is not effective. This study provides a taxonomic description of these species using thin section fossils and identifies their occurrence along the cretaceous rocks in a well located in the central part of the Middle Magdalena Valley, Colombia. The guidelines presented in this study validates the usefulness of this investigation method and ease the identification of these two species in thin section.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Fósiles calcáreos]]></kwd>
<kwd lng="es"><![CDATA[Foraminíferos]]></kwd>
<kwd lng="es"><![CDATA[Género Clavihedbergella]]></kwd>
<kwd lng="es"><![CDATA[Descripción taxonómica]]></kwd>
<kwd lng="es"><![CDATA[Cenomaniano]]></kwd>
<kwd lng="es"><![CDATA[Turoniano]]></kwd>
<kwd lng="en"><![CDATA[Calcareous fossils]]></kwd>
<kwd lng="en"><![CDATA[Foraminifera]]></kwd>
<kwd lng="en"><![CDATA[Genus Clavihedbergella]]></kwd>
<kwd lng="en"><![CDATA[Taxonomic description]]></kwd>
<kwd lng="en"><![CDATA[Cenomanian]]></kwd>
<kwd lng="en"><![CDATA[Turonian]]></kwd>
</kwd-group>
</article-meta>
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