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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Petrología</topic></authority><related type="narrower"><topic>Cristalografía</topic></related><related type="other"><topic>Metamorfismo</topic></related><related type="other"><topic>Geofísica</topic></related><related type="other"><topic>Rocas</topic></related><related type="other"><topic>Geoquímica</topic></related><related type="other"><topic>Sedimentología</topic></related><related type="other"><topic>Mineralogía</topic></related><variant type="other"><topic>Petrografía</topic></variant><variant type="other"><topic>Litología</topic></variant></mads>