<?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>S0120-02832023000300063</article-id>
<article-id pub-id-type="doi">10.18273/revbol.v45n3-2023004</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Palynology of Cretaceous amber deposits of the Oriente Basin-Ecuador and the Eastern Cordillera-Colombia]]></article-title>
<article-title xml:lang="es"><![CDATA[Palinología de depósitos de ámbar cretácicos de la Cuenca Oriente-Ecuador y la Cordillera Oriental-Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castaño-Cardona]]></surname>
<given-names><![CDATA[Rafael Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jaramillo]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pardo-Trujillo]]></surname>
<given-names><![CDATA[Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vento]]></surname>
<given-names><![CDATA[Barbara]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quiroz-Cabascango]]></surname>
<given-names><![CDATA[Daniela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Angulo-Pardo]]></surname>
<given-names><![CDATA[Estefanía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Caldas  ]]></institution>
<addr-line><![CDATA[Manizales ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Smithsonian Tropical Research Institute  ]]></institution>
<addr-line><![CDATA[Balboa ]]></addr-line>
<country>Panama</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Caldas Departamento de Ciencias Geológicas ]]></institution>
<addr-line><![CDATA[Manizales ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Argentino de Investigaciones en Zonas Áridas (IADIZA)  ]]></institution>
<addr-line><![CDATA[Mendoza ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Uppsala University Department of Earth Sciences ]]></institution>
<addr-line><![CDATA[Uppsala ]]></addr-line>
<country>Sweden</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad de Caldas Grupo de Investigaciones en Estratigrafía y Vulcanología (GIEV) Cumanday ]]></institution>
<addr-line><![CDATA[Manizales ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>45</volume>
<numero>3</numero>
<fpage>63</fpage>
<lpage>77</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-02832023000300063&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-02832023000300063&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-02832023000300063&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Several Cretaceous amber-bearing localities were recently discovered, including the Oriente Basin of Ecuador (Hollín Formation), and the Eastern Cordillera of Colombia (Une Formation at La Popa mine). A palynological study of 48 samples was carried out to date them and assess their broad floristic content. We date the Hollín Formation as spanning the late Aptian to the early Albian based on the co-occurrence of Callialasporites trilobatus, Retitricolpites operculatus and Callialasporites dampieri, among others. The sandstone lens containing amber from Une Formation at La Popa mine were dated as latest Aptian to early Cenomanian based upon the co-occurrence of Callialasporites dampieri, Afropollis jardinus, Ischyosporites variegatus and Gnetaceaepollenites retangularis. The palynoflora is dominated by high spore diversity suggesting humid climate conditions in the northwestern margin of Gondwana.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Recientemente fueron descubiertas varias localidades con ámbar cretácicas, incluidas la Cuenca Oriente de Ecuador (Formación Hollín) y la Cordillera Oriental de Colombia (Formación Une en la mina La Popa). Se realizó un estudio palinológico de 48 muestras para datarlas y evaluar su amplio contenido florístico. Nosotros datamos la Formación Hollín entre el Aptiano tardío y el Albiano temprano, con base en la co-ocurrencia de Callialasporites trilobatus, Retitricolpites operculatus y Callialasporites dampieri, entre otros. Los lentes de arenisca con ámbar de la Formación Une en la mina La Popa fueron datados como Aptiano tardío a Cenomaniano temprano basados en la co-ocurrencia de Callialasporites dampieri, Afropollis jardinus, Ischyosporites variegatus y Gnetaceaepollenites retangularis. El contenido palinológico es dominado por una alta diversidad de esporas, lo que sugiere condiciones climáticas húmedas en el margen noroccidental de Gondwana.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Palynology]]></kwd>
<kwd lng="en"><![CDATA[Cretaceous]]></kwd>
<kwd lng="en"><![CDATA[Amber]]></kwd>
<kwd lng="en"><![CDATA[Colombia]]></kwd>
<kwd lng="en"><![CDATA[Ecuador]]></kwd>
<kwd lng="en"><![CDATA[Tropical floras]]></kwd>
<kwd lng="es"><![CDATA[Palinología]]></kwd>
<kwd lng="es"><![CDATA[Cretácico]]></kwd>
<kwd lng="es"><![CDATA[Ámbar]]></kwd>
<kwd lng="es"><![CDATA[Colombia]]></kwd>
<kwd lng="es"><![CDATA[Ecuador]]></kwd>
<kwd lng="es"><![CDATA[Floras tropicales]]></kwd>
</kwd-group>
</article-meta>
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