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© Geocorp S.A.S. Todos los derechos reservados. 2018 Unidad 5. Génesis de Magmas Por: Geo. Jorge Arley Meza Estudio de Rocas Volcánicas CONTENIDO 2 5 6 Introducción: Estudio de Rocas Ígneas extrusivas Tipos de Volcanes, Clasificación de las Erupciones Productos Volcánicos y Volcaniclásticos Clasificación de las Rocas Vulcano-Sedimentarias Caracterización Petrográfica de Rocas Volcánicas Alteración Química del Vidrio 3 ¿Cómo es un Volcán? 2. Types of Volcanoes 4 Fissure Volcanoes 5 Fissure volcanoes are produced by eruptions that occur along elongated fissures versus at a central vent. Fissure eruptions occur when magma-filled dikes intersect the surface. Fissure eruptions usually do not build substantial edifices, but instead feed lava flows that can travel great distances. Fissure eruptions may also occur in rift zones on shield volcanoes. They also frequently occur in monogenetic volcanic fields. Cinder Cone Volcanoes 6 An easily recognized type of volcano is the cinder cone. As you might expect from the name, these volcanoes consist almost entirely of loose, grainy cinders consisting typically of basaltic and andesitic material and almost no lava. They are small volcanoes, usual...