Module 05 Volcano Tour Via Google Earth Lab

Name ____________________________________________ Part 2: Find Cinder Cone/Lava Dome Volcanoes Find two cinder cone volcanoes and fill in the following chart. Use Google Earth for this. Volcano #1 Volcano #2 Volcano Name Sunset Crater Mount Fox Location (City, State, Country) Flagstaff, Arizona, USA Shire of Hinchinbrook, Queensland, Australia Latitude & Longitude Lat.: 35.3642° N Lon: 111.5040° W Lat.: 18.8317° S Lon: 145.8011° E Summit elevation in meters 2450 m 120 m Describe its appearance (steep sides, gentle sides?) Steeply sided volcano with mild greenery Steeply sided volcano with mild greenery Sketch it. Active, dormant, or extinct? Extinct Dormant Has it ever caused property damage and/or loss of life? If so, how bad? There’s no evidence of people dying as a direct result of eruption, but it did burn and bury many Sinagura pit houses. No one has died due to an eruption, and no property damage has been caused. Location: hot spot, divergent boundary, or convergent subduction zone? Hotspot Hotspot What type of eruption? Gentle or explosive? Fluid lava flows or pyroclastic flows? Explosive with fluid lava flows Explosive with fluid lava flows Rock Type? Basaltic, Andesitic, Rhyolitic? Basaltic Basaltic Page 3 of 9

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Name ____________________________________________ Part 5: Summative Assessment (10 points) What do plate tectonics have to do with the type and/or explosiveness of the volcanoes that you found? What patterns in volcanic style can be found at convergent vs. divergent boundaries? How does the expression of hot spots differ in continents vs. oceans? Explain. The types of plates involved in any given interaction, as well as the type of interaction they have, will cause different kinds of magmas to form, and therefore different kinds of volcanoes as well. For example, when two oceanic plates diverge, basaltic magma rises, forming basaltic volcanoes, but when an oceanic plate subducts beneath a continental one, it melts the overlying continental crust, creating more rhyolitic or andesitic magmas, forming rhyolitic and andesitic volcanoes. Shield volcanoes are more likely to occur over hotspots and divergent plate boundaries. Cinder cones and composite volcanoes are more common over convergent plate boundaries. Calderas can form anywhere where there is a fierce eruption that destroys the volcano. In the ocean, hotspots form submarine volcanoes, and some may eventually form volcanic islands. Hotspots are less common in continents because it takes a much larger mantle plume to break through the thicker crust, but when they do occur they can also generate geysers with volcanoes. Page 9 of 9