<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-06-07T23:45:25Z</responseDate><request verb="GetRecord" identifier="oai:docta.ucm.es:20.500.14352/65026" metadataPrefix="qdc">https://docta.ucm.es/rest/oai/request</request><GetRecord><record><header><identifier>oai:docta.ucm.es:20.500.14352/65026</identifier><datestamp>2024-07-17T14:21:18Z</datestamp><setSpec>com_20.500.14352_14</setSpec><setSpec>col_20.500.14352_15</setSpec></header><metadata><qdc:qualifieddc xmlns:qdc="http://dspace.org/qualifieddc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://purl.org/dc/elements/1.1/ http://dublincore.org/schemas/xmls/qdc/2006/01/06/dc.xsd http://purl.org/dc/terms/ http://dublincore.org/schemas/xmls/qdc/2006/01/06/dcterms.xsd http://dspace.org/qualifieddc/ http://www.ukoln.ac.uk/metadata/dcmi/xmlschema/qualifieddc.xsd">
   <dc:title>Características de las alteraciones de las Sierras de Guadarrama y Malagón (Sistema Central Español)</dc:title>
   <dc:creator>Centeno Carrillo, Juan de Dios</dc:creator>
   <dc:creator>Brell Parlade, José Manuel</dc:creator>
   <dcterms:abstract>Se describen las características de las alteraciones desarrolladas sobre las rocas ígneas de un sector del Sistema Central. Criterios geomorfológicos y su distinta composición mineralógica permiten suponer su origen a partir de distintas etapas de alteración. Se discuten las condiciones climáticas durante su formación, realizada siempre bajo climas poco agresivos.</dcterms:abstract>
   <dcterms:abstract>The main features of the alterations developped on igneous rocks of Central System are described. From geomorphological criteria as well as mineralogical data, different stages of weathering are been inferred. Although weathering processes have not been strong, different conditions are discussed for each stage.</dcterms:abstract>
   <dcterms:dateAccepted>2023-06-21T02:10:14Z</dcterms:dateAccepted>
   <dcterms:available>2023-06-21T02:10:14Z</dcterms:available>
   <dcterms:created>2023-06-21T02:10:14Z</dcterms:created>
   <dcterms:issued>1987</dcterms:issued>
   <dc:type>journal article</dc:type>
   <dc:identifier>https://hdl.handle.net/20.500.14352/65026</dc:identifier>
   <dc:identifier>0213-4497</dc:identifier>
   <dc:language>spa</dc:language>
   <dc:rights>open access</dc:rights>
   <dc:publisher>Seminario de Estudos Galegos. Area de Xeoloxía e Minería ;  Instituto Universitario de Xeoloxía "Isidro Parga Pondal"</dc:publisher>
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