<?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>S0120-02832021000100035</article-id>
<article-id pub-id-type="doi">10.18273/revbol.v43n1-2021002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Reconocimiento geológico de la Formación La Luna en el sector de Matanza (Oeste del Macizo de Santander, Colombia)]]></article-title>
<article-title xml:lang="en"><![CDATA[Geological evaluation of La Luna Formation at the Matanza area (west Santander Massif, Colombia)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Patarroyo-Camargo]]></surname>
<given-names><![CDATA[German David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alarcón-Gómez]]></surname>
<given-names><![CDATA[Carlos Mario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Parada]]></surname>
<given-names><![CDATA[José Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz-Villamizar]]></surname>
<given-names><![CDATA[Jefferson Steven]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Coronado]]></surname>
<given-names><![CDATA[Juan Sebastián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Márquez-Prada]]></surname>
<given-names><![CDATA[José Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pontón-Parada]]></surname>
<given-names><![CDATA[Liz Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barragán-Martinez]]></surname>
<given-names><![CDATA[Diana Marcela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Industrial de Santander Semillero de Paleontología y Bioestratigrafía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Stratos Consultoría Geológica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Industrial de Santander Semillero de Paleontología y Bioestratigrafía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Industrial de Santander Semillero de Paleontología y Bioestratigrafía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Industrial de Santander Semillero de Paleontología y Bioestratigrafía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad Industrial de Santander Semillero de Paleontología y Bioestratigrafía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Universidad Industrial de Santander Semillero de Paleontología y Bioestratigrafía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af8">
<institution><![CDATA[,Fundación Universitaria del Área Andina  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af9">
<institution><![CDATA[,Fundación Universitaria del Área Andina  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2021</year>
</pub-date>
<volume>43</volume>
<numero>1</numero>
<fpage>35</fpage>
<lpage>51</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-02832021000100035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-02832021000100035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-02832021000100035&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este trabajo abarcó el estudio sedimentológico, paleontológico y geoquímico de la Formación La Luna, en una localidad al oeste del Macizo de Santander (Matanza, Colombia). La sección corresponde a un corte de 42 metros, compuesto por una alternancia de mudstones y wackestones inter- estratificados, niveles de chert, fosforitas y bentonitas. El contenido fósil está conformado por restos de amonitas, inocerámidos, gasterópodos turritélidos, fragmentos de peces y foraminíferos planctónicos. La asociación fósil indica una edad de Coniaciano-Santoniano. Las características sedimentológicas, el tipo de fósiles encontrados y los análisis petrográficos/geoquímicos desarrollados en esta sección sugieren condiciones de depositación en plataforma externa y una baja oxigenación en los sedimentos de fondo. Las conclusiones de este trabajo coinciden con interpretaciones preexistentes de la región cuenca, sugiriendo relaciones litoestratigráficas con la sucesión sedimentaria del Valle Medio del Magdalena (parte superior del &#8220;Miembro Galembo&#8221;). Sin embargo, solo estudios estratigráficos detallados en esta parte del Macizo de Santander, permitirán entender su evolución geológica durante el Cretácico superior.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This study comprised the sedimentological, paleontological and geochemical survey of the La Luna Formation, using as a reference one section in the west flank of the Santander Massif (Matanza, Colombia). The 42-meter length section comprises an alternance of interstratified mudstones, wackestones, chert, phosphorite and bentonite levels. Fossil content is defined by rest of ammonoids, inoceramids, turritellid gastropods, fish remains and planktonic foraminifers, suggesting all a Coniacian-Santonian age. The facial analysis, the fossil content and preliminary petrographic/geochemical analysis also suggest an outer shelf setting and low oxygenation conditions in the bottom sediments. In general, our results agree with previous interpretations of La Luna Formation, suggesting a closer relation with the Upper Cretaceous succession of the Middle Magdalena (upper &#8220;Galembo Member&#8221;). However, only detailed stratigraphical studies in this part of the Santander Massif, will allow a better understanding of its geological evolution during the Late Cretaceous.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cretácico superior]]></kwd>
<kwd lng="es"><![CDATA[Litoestratigrafía]]></kwd>
<kwd lng="es"><![CDATA[Formación La Luna]]></kwd>
<kwd lng="es"><![CDATA[Macizo de Santander]]></kwd>
<kwd lng="es"><![CDATA[Paleontología]]></kwd>
<kwd lng="en"><![CDATA[Upper Cretaceous]]></kwd>
<kwd lng="en"><![CDATA[Lithostratigraphy]]></kwd>
<kwd lng="en"><![CDATA[La Luna Formation]]></kwd>
<kwd lng="en"><![CDATA[Santander Massif]]></kwd>
<kwd lng="en"><![CDATA[Paleontology]]></kwd>
</kwd-group>
</article-meta>
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