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(L08)Volcanoes_and_Volcanism_E10

(L08)Volcanoes_and_Volcanism_E10 - Volcanoes and Volcanism...

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1 Volcanoes and Volcanism GLY 2010 – Summer 2010 – Lecture 8 Eruption of Mt. Vesuvius, Italy
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2 Volcano A vent in the surface of the Earth through which magma and associated gases and ash erupt Also, the form or structure, usually conical, that is produced by the ejected material Plural: volcanoes Etymology: the Roman deity of fire, Vulcan
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3 Pyroclastic Eruptions Magma spews upward with great force through a central vent Left: Mt. St. Helens, 1980 Right: Kilauea, Hawaii
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4 Fissure Eruptions Volcanic eruptions may occur much more quietly along long cracks in the ground
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5 Fissure Image Eruptive fissure on southeast rim of Kilauea caldera, Hawaii
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6 Fissure Eruption Mauna Loa Volcano, Hawaii
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Lava Flow Video Kilauea, Hawaii, July 13, 2007 7
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8 Flowing Lava Video (Upper left)Lava falls Kilauea, Hawaii (Lower left) Fissure eruptions, Hawaii (with sound) (Below) Lava flow damage (with so und)
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9 Columbia River Flood Basalt Imnahu River Canyon Photo: Stephen Reidel
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10 Columbia River Flood Basalt Grande Ronde Basalt
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11 Pillow Basalt
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12 Pillow Flow, Hawaii Click video to play
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13 Pillow Deltas
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14 Vesicles
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15 Scoria
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16 Lava Tube or Tunnel
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17 Nahuku Lava Tube Thurston (Nahuku) lava tube Near summit caldera of Kilauea Volcano, Hawaii Volcanoes National Park
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18 Lava Tube, Hawaii
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19 Lava-Sicles Ape Cave, Mt. St. Helens
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20 Andesite Volcanoes Nevado Ojos del Salado, Chile /Argentina frontier
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