<?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>0188-8897</journal-id>
<journal-title><![CDATA[Hidrobiológica]]></journal-title>
<abbrev-journal-title><![CDATA[Hidrobiológica]]></abbrev-journal-title>
<issn>0188-8897</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-88972018000100093</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Correlación litológica del subsuelo del lago de Texcoco]]></article-title>
<article-title xml:lang="en"><![CDATA[Lithological correlation of Texcoco lake subsoil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carranza-Edwards]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Ciencias del Mar y Limnología Unidad Académica de Procesos Oceánicos y Costeros]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<volume>28</volume>
<numero>1</numero>
<fpage>93</fpage>
<lpage>101</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972018000100093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972018000100093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972018000100093&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes  Originalmente, en la cuenca de México existía un sólo lago conocido como lago de Texcoco, el cual fue separado por un albarradón construido por los aztecas para evitar que aguas saladas se mezclaran con aguas dulces de Tenochtitlán.  Objetivos  El objetivo de este trabajo es definir si la ausencia de la capa productora de salmueras en la zona meridional del lago de Texcoco es causada por fallas o por cambios de facies; para ello se realizó un estudio de correlación litológica mediante núcleos con recuperación continua de sedimentos.  Métodos  Se obtuvieron cinco núcleos con una máquina rotatoria para definir la litología en una sección transversal N-S a lo largo del lago de Texcoco mediante la descripción litológica detallada.  Resultados  La capa dura no mostraba fallas, sino afectación por facies. La presencia de cenizas volcánicas fue útil para la correlación litológica. Los sedimentos son corrosivos por su salinidad. Se observan lodos verdosos reductores y lodos rojizos oxidantes con intercalaciones de ostrácodos. La variación de los sedimentos del subsuelo lo hace un medio no homogéneo con profundidades desde 37 m hasta 60 m. Los lodos del lago producen efectos amplificadores por ondas sísmicas.  Conclusiones  Los sedimentos lacustres del subsuelo del lago de Texcoco son medios heterogéneos y el subsuelo es altamente corrosivo debido a su salinidad. Se definió con éxito la primera capa dura y se encontró una segunda capa dura debajo de la primera. Hay diversas facies litológicas con intercalaciones de cenizas volcánicas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background  Originally, there was a single lake in the Mexico Basin known as Texcoco Lake, which was separated by an levee constructed by the Aztecs to prevent salt water from the north from mixing with fresh water of Tenochtitlan.  Goals  The objective of this work was to determine if the absence of the brine productive layer in the southern zone of Lake Texcoco is caused by faults or changes in facies. A study of lithological correlation was carried out using cores with continuous recovery of sediments.  Methods  Five cores were made with a rotary machine in order to define the lithology in an N-S cross section along the Lake of Texcoco, by means of a detailed lithological description.  Results  We determined that the brine productive hard layer was not affected by faults, but rather changed in the meridional lake zone due to muddy facies. The presence of volcanic ash, sometimes pumitic, was useful for the lithological correlation. Sediments are corrosive due to their salinity concentrations. Reducing greenish muds and oxidant red muds were found with frequent ostracods intercalations. There is a non-homogeneous medium with depths from 37 m to 60 m. The muds may amplify seismic waves.  Conclusions  Lacustrine sediments in the subsoil of Texcoco Lake are a heterogeneous media and the subsoil is highly corrosive due to its salinity levels. The first hard layer was successfully defined and a second hard layer was found under the first hard layer. There are diverse lithological facies with interbedded volcanic ashes.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[acuíferos salinos]]></kwd>
<kwd lng="es"><![CDATA[cenizas volcánicas]]></kwd>
<kwd lng="es"><![CDATA[corrosión]]></kwd>
<kwd lng="es"><![CDATA[fracturas]]></kwd>
<kwd lng="es"><![CDATA[gas metano]]></kwd>
<kwd lng="es"><![CDATA[subsidencia]]></kwd>
<kwd lng="en"><![CDATA[corrosion]]></kwd>
<kwd lng="en"><![CDATA[fractures]]></kwd>
<kwd lng="en"><![CDATA[methane gas]]></kwd>
<kwd lng="en"><![CDATA[saline aquifers]]></kwd>
<kwd lng="en"><![CDATA[subsidence]]></kwd>
<kwd lng="en"><![CDATA[volcanic ashes]]></kwd>
</kwd-group>
</article-meta>
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