'Basaltic lava flow reaching' presentation slideshows

Volcanic Hazards Primary Effects -lava flows -pyroclastic eruptions -poisonous gas emissions

The slope angle of the of strato (composite) volcanoes is controlled by the angle of repose for unconsolidated pyroclasts and the viscosity properties of the silica-rich andesite and dacite flows. The volcanoes shown above are part of the Aleutian Island, Alaska.

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