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	mads.xsd"><authority><topic authority="http://www.serbi.ula.ve/tematres/vocab/">PETROLOGIA</topic></authority><related type="narrower"><topic>ANALISIS PETROFABRICO (ROCAS)</topic></related><related type="narrower"><topic>CRISTALOGRAFIA</topic></related><related type="narrower"><topic>FACIES (GEOLOGIA)</topic></related><related type="narrower"><topic>GASES EN LAS ROCAS</topic></related><related type="narrower"><topic>GEOLOGIA</topic></related><related type="narrower"><topic>MINERALOGIA</topic></related><related type="narrower"><topic>PETROGENESIS</topic></related><related type="narrower"><topic>PIEDRA</topic></related><related type="narrower"><topic>Rocas y variedades de rocas</topic></related><related type="other"><topic>GEOLOGIA</topic></related><related type="broader"><topic>GEOFISICA</topic></related><variant type="other"><topic>Litología</topic></variant><variant type="other"><topic>Petrografía</topic></variant></mads>