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          <family>Hernando Costa</family>
          <given>J.</given>
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          <family>Hernando Costa</family>
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    <title>La "Alteración pretriásica" según el estudio de las fracciones pesadas de materiales detríticos.</title>
    <ispublished>pub</ispublished>
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    <keywords>Pretriásico</keywords>
    <abstract>Se estudian las fracciones pesadas y ligeras de los materiales detríticos pérmicos que se encuentran inmediatamente por debajo de la base del Buntsandstein y, por lo tanto, afectados por la «alteración pretriásica”. obteniéndose algunos datos sobre las características de dicha alteración, y ensayos sobre los resultados de la técnica de los minerales pesados y de las fracciones ligeras en el estudio de paleosuelos y palcoalteraciones.</abstract>
    <abstract_other>
      <item>
        <abstract2>We have studied the heavy fractions and the light ones of the Permian
detrical materjals which are found just under the base of Buntsandtein, and
so tbey are afected by the pretriasic alteration we have obteined sorne results
about the characteristic of Ihese alteration, and tests aboud the results of the
heavy minerals tecnic and the light fraction in the study of paleosoil and paleoalteration.</abstract2>
        <lang>en</lang>
      </item>
    </abstract_other>
    <date>1977</date>
    <date_type>published</date_type>
    <publisher>Servicio de Publicaciones de la Universidad Complutense de Madrid</publisher>
    <official_url>https://revistas.ucm.es/index.php/CGIB/index</official_url>
    <categoria>INVESTIGACION</categoria>
    <full_text_status>public</full_text_status>
    <publication>Cuadernos de geología ibérica</publication>
    <volume>4</volume>
    <pagerange>99-110</pagerange>
    <refereed>TRUE</refereed>
    <issn>0378-102X</issn>
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