Volcanoes |
Contents
Narrative of Two Eruptions | 1 |
Some Definitions | 21 |
Volcanic Rocks and Magmas | 42 |
Copyright | |
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Common terms and phrases
activity andesite ash flows basalt beds beneath Bezymianny block lava bombs breccia caldera central Chapter cinder cones cloud collapse commonly conduit cooling Crater Lake crust crystals cubic miles dacite debris deposits depth dikes dome earth earthquakes edge ejected erosion erup eruption explosions feet high feldspar fissure flank formation formed fractures fragments fumaroles G. A. Macdonald gases Geol Geological Survey photo geyser glass glowing avalanches graben Hawaii Hawaiian heat hyaloclastite Iceland ignimbrites Island Jaggar Kilauea Volcano Krakatoa lapilli lava flows lava lake layers liquid magma mass material Mauna Loa minerals molten mountain mudflows nearly ocean pahoehoe partly Pelée peridotite photo by G. A. pillow Plate probably pumice region result rhyolite rift zone rising sea level shield volcanoes slope spatter steam Strombolian summit surface temperature tephra thick tion tuff upper valley vent Vesuvius viscous volcanic rocks volcanology volume Vulcanian walls welding