<?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>0188-4611</journal-id>
<journal-title><![CDATA[Investigaciones geográficas]]></journal-title>
<abbrev-journal-title><![CDATA[Invest. Geog]]></abbrev-journal-title>
<issn>0188-4611</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geografía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-46111992000200001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Retroceso reciente de la línea de costa del frente deltaico del río San Pedro, Campeche-Tabasco]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortíz Pérez]]></surname>
<given-names><![CDATA[Mario A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geografía ]]></institution>
<addr-line><![CDATA[ D.F.]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>1992</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>1992</year>
</pub-date>
<numero>25</numero>
<fpage>7</fpage>
<lpage>23</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-46111992000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-46111992000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-46111992000200001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se identifican evidencias y se miden las modificaciones de la línea de costa, mediante el análisis comparativo de imágenes aéreas, tomadas en diferentes fechas, considerando los últimos 40 años. Tales cambios son al parecer reflejo de un hundimiento de esta porción del litoral.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The mean geomorphological modification of beaches and coastal plains area analized in recent years through comparative photointerpretation of aerial images taken in different dates. It is argued that such modifications derive from an environment desequilibrium induced by submergent shoreline.]]></p></abstract>
</article-meta>
</front><body><![CDATA[  	    <p align="center"><font face="verdana" size="4"><b>Retroceso reciente de la l&iacute;nea de costa del frente deltaico del r&iacute;o San Pedro, Campeche&#150;Tabasco*</b></font></p>  	    <p>&nbsp;</p>  	    <p align="center"><font face="verdana" size="2"><b>Mario A. Ort&iacute;z P&eacute;rez**</b></font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><i>**Instituto de Geograf&iacute;a, Universidad Nacional Aut&oacute;noma de M&eacute;xico, Apdo. Postal 20&#150;850, 01000 M&eacute;xico, D.F.</i></font></p>  	    <p align="justify">&nbsp;</p> 	    <p align="justify"><font face="verdana" size="2">*Recibido: 23 de mayo de 1991.</font></p>      <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Se identifican evidencias y se miden las modificaciones de la l&iacute;nea de costa, mediante el an&aacute;lisis comparativo de im&aacute;genes a&eacute;reas, tomadas en diferentes fechas, considerando los &uacute;ltimos 40 a&ntilde;os. Tales cambios son al parecer reflejo de un hundimiento de esta porci&oacute;n del litoral.</font></p>  	    <p align="justify">&nbsp;</p> 	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>      <p align="justify"><font face="verdana" size="2">The mean geomorphological modification of beaches and coastal plains area analized in recent years through comparative photointerpretation of aerial images taken in different dates. It is argued that such modifications derive from an environment desequilibrium induced by submergent shoreline.</font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><a href="/pdf/igeo/n25/n25a1.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>Referencias</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">J&aacute;uregui Ostos, E. (1971), <i>Variaciones de largo periodo de loa tipos de tiempo de superficie en M&eacute;xico,</i> Bolet&iacute;n del Instituto de Geograf&iacute;a, n&uacute;m. 4, UNAM, M&eacute;xico, p&aacute;gs. 9&#150;22.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4629863&pid=S0188-4611199200020000100001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    ]]></body>
<body><![CDATA[<!-- ref --><p align="justify"><font face="verdana" size="2">J&aacute;uregui Ostos, E. (1975), <i>Los sistemas de tiempo en el Golfo de M&eacute;xico y su vecindad,</i> Bolet&iacute;n del Instituto de Geograf&iacute;a, n&uacute;rn. 6, UNAM, M&eacute;xico, p&aacute;gs. 7&#150;36.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4629865&pid=S0188-4611199200020000100002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Manzano B., O. (1989), <i>Estudio geomorfol&oacute;gico para la zonificaci&oacute;n de las &aacute;reas de manejo de la reserva de la bi&oacute;sfera, "Los pantanos de Centla Tabasco"</i> tesis, Colegio de Geograf&iacute;a, Facultad de Filosof&iacute;a y Letras, UNAM, M&eacute;xico.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4629867&pid=S0188-4611199200020000100003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Ortiz P., M.A. (1988), <i>Evidencias de cambios geomorfol&oacute;glcos del sistema litoral mediante el an&aacute;lisis de im&aacute;genes a&eacute;reas, Memorias, Ecolog&iacute;a y Conservaci&oacute;n del delta de los r&iacute;os Usumacinta y Grijalva,</i> Instituto Nacional de Investigaciones sobre Recursos Bi&oacute;ticos, Divisi&oacute;n Regional Tabasco, Gobierno del estado de Tabasco, p&aacute;gs. 43&#150;54.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4629869&pid=S0188-4611199200020000100004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Psuty, Norbert P. (1965), <i>Beach&#150;Ridge Development in Tabasco,</i> Annals of the Association of American Geographers, vol. 55, M&eacute;xico, p&aacute;gs. 112&#150;124.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4629871&pid=S0188-4611199200020000100005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Psuty, Norbert P. (1967), <i>The Geomorphology of Beach Ridges in Tabasco, Mexico,</i> Coastal Studies Series No. 18, Louisiana State University Press, Baton Rouge.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4629873&pid=S0188-4611199200020000100006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    ]]></body>
<body><![CDATA[<!-- ref --><p align="justify"><font face="verdana" size="2">Thorn, Bruce G. (1967), <i>Mangrove Ecology and Deltaic Geomorphology. Tabasco, Mexico,</i> Journal of Ecology, vol. 55, p&aacute;gs. 301&#150;343.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4629875&pid=S0188-4611199200020000100007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">West, R. C., Psuty, N. P. y B. Thorn (1969), <i>The Tabasco Lowlands of Southeastern Mexico,</i> Coastal Studies Series No. 27, Louisiana State University Press, Baton Rouge.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4629877&pid=S0188-4611199200020000100008&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>      ]]></body><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jáuregui Ostos]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang="es"><![CDATA[Variaciones de largo periodo de loa tipos de tiempo de superficie en México]]></article-title>
<source><![CDATA[Boletín del Instituto de Geografía]]></source>
<year>1971</year>
<numero>4</numero>
<issue>4</issue>
<page-range>9-22</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[UNAM]]></publisher-name>
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</name>
</person-group>
<article-title xml:lang="es"><![CDATA[Los sistemas de tiempo en el Golfo de México y su vecindad]]></article-title>
<source><![CDATA[Boletín del Instituto de Geografía]]></source>
<year>1975</year>
<numero>6</numero>
<issue>6</issue>
<page-range>7-36</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[UNAM]]></publisher-name>
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<name>
<surname><![CDATA[Manzano B.]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio geomorfológico para la zonificación de las áreas de manejo de la reserva de la biósfera, "Los pantanos de Centla Tabasco"]]></source>
<year>1989</year>
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<surname><![CDATA[Ortiz P.]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evidencias de cambios geomorfológlcos del sistema litoral mediante el análisis de imágenes aéreas, Memorias, Ecología y Conservación del delta de los ríos Usumacinta y Grijalva]]></source>
<year>1988</year>
<page-range>43-54</page-range><publisher-name><![CDATA[Instituto Nacional de Investigaciones sobre Recursos BióticosDivisión Regional Tabasco, Gobierno del estado de Tabasco]]></publisher-name>
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<source><![CDATA[Annals of the Association of American Geographers]]></source>
<year>1965</year>
<volume>55</volume>
<page-range>112-124</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
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<source><![CDATA[The Geomorphology of Beach Ridges in Tabasco, Mexico]]></source>
<year>1967</year>
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</back>
</article>
