Mudflows - PowerPoint PPT Presentation

History

History. Mt Tehama composite volcano built 600,000 to 400,000 years ago Mt Tehama collapse(?) and erosion Domes, glaciers and more domes Most recent activity 1914-1917. June 14, 1914 One of more than 150 steam-blast (phreatic) eruptions. May 14 th dome. May 19 th flow.

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MASS MOVEMENT

MASS MOVEMENT. LET’S LOOK AT PAGE 32 OF NEW GEO . Mass movement. Mass movement is the movement of any loose weathered material down a slope under the influence of gravity. WHAT CAUSES MASS MOVEMENT. HUMAN TRIGGERS OVER GRAZING CATTLE DEFORESTATION ROAD BUILDING QUARRYING.

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