08_volcano_10_post

08_volcano_10_post - 08: Volcanoes ture 8: 1 M t. St....

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cture 8: 1 08: Volcanoes Mt. St. Helens eruption, May 18, 1980. Photo: USGS.
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cture 8: 2 Why is this topic important? Distribution of most volcanoes is related to boundaries between tectonic plates (volcanoes above sea level) Note: Numerous small volcanoes are present along spreading centers; larger volcanoes make up most seamounts (submerged volcanic islands) Fig. 6.19
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cture 8: 3 Why is this topic important? Studying lava flow, Kilauea, Hawaii Lava reveals hints about the composition and pressure- temperature conditions of rocks that melted. Kilauea Volcano, Hawaii. Photo: M. Krafft
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cture 8: 4 Volcanism forms a significant geologic hazard Santorini (Thera), Greece (eruption ~3500 BC). Photos: R.W. Schlische Why is this topic important? Eruption may have wiped out Minoan civilization
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cture 8: 5 Volcanism forms a significant geologic hazard Pompeii & Vesuvius, Italy (Eruption 79 AD). Photos: R.W. Schlische Why is this topic important?
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cture 8: 6 Undersea eruption produces steam Volcanic eruptions affect climate and were responsible for forming Earth's atmosphere. Why is this topic important?
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cture 8: 7 Photos: R.W. Schlische Photos: R.W. Schlische Igneous processes form a variety of mineral deposits and contribute geothermal energy. Why is this topic important? Sulfur deposits on Sierro Negro Volcano, Galapagos Islands. Photo: C. Grzimek Photo: C. Grzimek
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cture 8: 8 Yellowstone National Park, Wyoming. Photos: R.W. Schlische Igneous processes form a variety of mineral deposits and contribute geothermal energy. Why is this topic important?
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cture 8: 9 Volcano geometry Volcano : constructional feature built up around a vent through which magma escapes to the surface. Multiple flows build up cone Fig. 9.10 Fig. 9.10
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cture 8: 10 Magma withdrawal Magma withdrawal --> collapse --> --> collapse --> depression depression Caldera Caldera : large : large depression depression Crater Crater : small : small depression depression Fig. 9.10 Fig. 9.10 Volcano geometry
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cture 8: 11 Magma withdrawal --> collapse --> depression Photo: G. Vaughn Photo: F. Villa Volcano geometry Crater Caldera
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cture 8: 12 El Misti volcano, near Arequipa, Peru. Photos: R.W. Schlische Volcano geometry
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cture 8: 13 Volcano size and shape Q1. Which volcano is smallest? A. Mauna Loa B. Mt. Rainier C. Sunset Crater Q2. Which volcano has the gentlest average slope? A. Mauna Loa B. Mt. Rainier C. Sunset Crater
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Volcano size and shape Q3. What is the average slope angle of the right side of Mauna Loa? A. 5° B. 30° C. 40° D. 50° E. 85° Q4. What is the slope angle of the left side of the top of Mt. Rainier? A. 5° B. 30° C. 40° D. 50° E. 85° Q5. What is the slope angle of the left side of the top of Sunset Crater? A. 5°
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This note was uploaded on 02/25/2012 for the course 460 100 taught by Professor Schlsche during the Spring '09 term at Rutgers.

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08_volcano_10_post - 08: Volcanoes ture 8: 1 M t. St....

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