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Lecture_05 - LECTURE 5 VOLCANO DYNAMICS 1.0 DISTRIBUTION OF...

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Lecture 5. Revised 8/08 1 LECTURE 5: VOLCANO DYNAMICS 1.0 DISTRIBUTION OF VOLCANOES COMMON ALONG DIVERGENT BOUNDARIES I.E. SUBMARINE BLACK SMOKERS, HEKLA, KATLA AND GRIMSV Ő TN, ICELAND COMMON ALONG CONVERGENT BOUNDARIES I.E. PACIFIC RING OF FIRE CONTAINS 75% OF WORLDS ACTIVE AND DORMANT VOLCANOES COMMON AT HOT SPOTS (MID PLATE VOLCANOES) I.E. MAUNA LOA AND KILAUEA , HAWAII 1.1 TYPES OF MAGMA BASALTIC CHARACTERIZED BY LOW SILICA AND LOW VISCOSITY, HENCE FLOWS EASILY RYOLYTIC CHARACTERIZED BY HIGH SILICA AND HIGH VISCOSITY, HENSE THICK AND EXPLOSIVE ANDESITIC CHARACTERIZED BY INTERMEDIATE COMPOSITION AND INTERMEDIATE VISCOSITY 1.2 TYPES OF VOLCANOES
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Lecture 5. Revised 8/08 2 FISSURE ERUPTIONS FLOOD BASALTS I.E. COLUMBIA PLATEAU, WASHINGTON & OREGON SHIELD VOLCANOES I.E. MAUNA LOA, HAWAII VOLCANIC (RESURGENT) DOMES I.E. SUMMIT CRATER, MT. ST. HELENS CINDER CONES I.E. PARICUTIN, MEXICO COMPOSITE OR STRATOVOLCANOES I.E. MT. ST. HELENS, WASHINGTON; MOUNT FUJI, TOKYO; ALEUTIAN ISLANDS, ALASKA CALDERA I.E. CRATER LAKE, OREGON 1.3 VOLCANIC REMNANTS VOLCANIC NECK I.E. DEVIL’S TOWER, WYOMING 1.4 VOLCANIC HAZARDS LAVA
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Lecture 5. Revised 8/08
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