UT Arlington GEOL 1113 - Volcanoes and Volcanic Rocks II (50 pages)

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Volcanoes and Volcanic Rocks II



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Volcanoes and Volcanic Rocks II

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Lecture Notes


Pages:
50
School:
University of Texas at Arlington
Course:
Geol 1113 - Quick Site Navigation

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Volcanoes and Volcanic Rocks II Volcanoes and Volcanic Rocks II Photo credit G Mattioli types of volcanoes reflect magma composition silica content shield volcanoes cinder cones composite volcanoes volcanic domes note steepness of volcano sides volcano type and size relative to central vent shield volcanoes are by far the largest shield volcanoes low and broad like a shield gently sloping built by low viscosity lava flows basalts QuickTime and a TIFF Uncompressed decompressor are needed to see this picture summit of Mauna Loa shield volcanoes built by lava flows QuickTime and a TIFF Uncompressed decompressor are needed to see this picture solidified layers of lava Magma Chamber eruptions from central vent summit caldera may form lava lakes flank sides of volcano may form ribbons of lava QuickTime and a TIFF Uncompressed decompressor are needed to see this picture lava lake in the summit caldera QuickTime and a TIFF Uncompressed decompressor are needed to see this picture QuickTime and a H 264 decompressor are needed to see this picture flank eruption through a fissure crack QuickTime and a TIFF Uncompressed decompressor are needed to see this picture fire fountaining during flank eruption flow of lava down the slope can make tubes QuickTime and a TIFF Uncompressed decompressor are needed to see this picture outside of flow cools solidifies inside of flow still flowing basaltic flows of two types pahoehoe ropy QuickTime and a H 264 decompressor are needed to see this picture QuickTime and a H 264 decompressor are needed to see this picture blocky flows aa QuickTime and a H 264 decompressor are needed to see this picture characteristics of basaltic flows Hawaii temperature as high as 1175 C 2150 F speed downslope may exceed 30 km hr pahoehoe and aa depends on gas content aa farther from vent lava degassed formation of spatter cone QuickTime and a H 264 decompressor are needed to see this picture shield volcanoes on other planets Olympus Mons on Mars what happens when



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