Geo Sci Vocabulary - Vocabulary Aa A type of lava that is flows slower and is more viscous which commonly has a rough blocky texture Andesite A

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Vocabulary: Aa – A type of lava that is flows slower and is more viscous which commonly has a rough, blocky texture. Andesite – A type of magma which has a mild temperature, silica content and viscosity. It is more of a mild type of magma with characteristics closer to those of basalt. Basalt – A type of magma which has the highest temperatures, lowest silica content, and lowest viscosity with a peaceful eruption style. Base Surge – A surge that can travel at hurricane speeds as masses of ground-hugging hot water and gases with or without magma fragments. Caldera – These eruptions are the largest of the violent, explosive volcanic behaviors. Calders are large depression which are formed by roof collapse into partially emptied magma reservoirs. Cinder Cone – A cone that is created after the excess gas has been expelled from the subsurface magma chamber, then may have lava pour out of its crater. Crater – A basin on top of the cone that usually is less than 2 km in diameter. Fissure – The most peaceful types of eruptions. They are referred to as fissure eruptions because lava pours out of linear vents or long fractures. Flood Basalt
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This note was uploaded on 03/17/2009 for the course GEO SCI 105 taught by Professor Rhodes during the Spring '06 term at UMass (Amherst).

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Geo Sci Vocabulary - Vocabulary Aa A type of lava that is flows slower and is more viscous which commonly has a rough blocky texture Andesite A

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