produced a phreatic eruption. The volcano is a strata volcano also. Mount St. Helens is a composite volcano which lies near to a destructive plate boundary where the small Juan de Fuca Plate is being subducted underneath the North American Plate where as the eruption in Montserrat was due to subduction‚ but the Atlantic tectonic plate subducts beneath the Caribbean plate. Mt St Helens went on to erupt in a Plinean style‚ spewing out ash and produce pyroclastic flows -currents of hot gas and ash. The magma
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Evolution of Australian Biota 1. Evidence for the rearrangement of crustal plates and continental drift indicates that Australia was once part of an ancient super continent Identify and describe evidence that supports the assertion that Australia was once part of a landmass called Gondwana including: Matching continental margins Gondwana once consisted of South America‚ Africa‚ Madagascar‚ India‚ Antarctica‚ Australia‚ New Zealand and New Guinea. Continental margin: zone between the ocean basin
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atmosphere was still thin‚ accumulating fresh water from space that filled the basins in the formative crust. 5. Define Pacific Ring of Fire: A. Ocean-girdling zone of crustal instability‚ volcanism‚ and earthquakes resulting from the tectonic activity along plate boundaries in the region. 6. When do scientists suggest that Homo sapiens appeared on the Earth? A. A warming phase that occurred between 120‚000 and 100‚000 years ago. 7. What came close to exterminating humanity about 73‚500 years ago
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Associate Level Material Earthquake Technology Worksheet Answer the lab questions for this week and summarize the lab experience using this form. Carefully read Ch. 9 of Geoscience Laboratory. Complete this week’s lab by filling in your responses to the questions from Geoscience Laboratory. Although you are only required to respond to the questions in this worksheet‚ you are encouraged to answer others from the text on your own. Questions and charts are from Geoscience Laboratory‚ 5th ed. (p
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The Importance of Ocean Exploration. As soon as humanity existed‚ people were tempted to explore and discover everything around them. This invincible desire has led humanity on its way of discovering Earth. And it seems that our planet is totally explored‚ everything is revealed and there is no place where any man has not gone before (or any robot hasn’t recorded). The next step is outside Earth. After the first space flight humankind concentrated its attention on exploring the galaxy‚ searching
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eventually formed limestone and other similar carbonate rocks. Preservation of marine invertebrate fossils provides evidence for a marine setting for the Paleozoic. Starting around 250 million years ago‚ the Mesozoic era‚ the earths crust rose due to tectonic shifts. This forced water out of the area leaving behind rock formations of salt and gypsum‚ this lead to the exposure of the former sea bed causing the rock to oxidize to the now characteristic red-orange color. The Paleozoic carbonates are dominantly
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materials that make up the earth and the processes that form and change those materials -4.6 billion Oceanography- study of earths oceans 3/4 Of earths surface * subspecialties are climatology‚ ecology‚ paleontology‚ geochemistry‚ hydrology and tectonics Lithosphere - rigid outer shell of the planet and includes the solid uppermost part of the layer below the crust‚ called the mantle -oceanic crust-dense rock called basalt -continental crust-less dense rock called granite
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http://homeworkfox.com/questions/general-questions/1166/sci-209-complete-course-oceanography/ SCI 209 Complete Course Oceanography SCI 209 Complete Course Oceanography SCI 209 Week 1 SCI 209 Week 1 Individual Assignment NOAA Activity Part One Ocean Exploration Navigate to the National Oceanic and Atmospheric Administration (NOAA) site at http://oceanservice.noaa.gov/ Select Explore from the menu‚ then select Ocean Exploration listed below Oceans. Choose an explorative mission that took place
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A metamorphic Rock can be formed by simply being under the earth’s surface‚ being exposed to extremely high temperatures and a huge amount of pressure from the layers of rock above. These rocks can be formed by tectonic processes‚ some which include‚ continental collisions (this is a process that causes friction‚ distortion and horizontal pressure). These rocks can also be formed when rock becomes heated rapidly by the intrusion of a hot molten rock‚ (called magma) and it comes from the earth’s interior
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GENERAL GEOLOGY - GEOL 1113 EXAM I WITH ANSWERS - Spring 2002 Below you will find the questions and answers for Exam I in my General Geology class. The correct answer for each question is highlighted in bold face green type. While you are reviewing the exam‚ pause at the questions you find you missed and try to understand why you missed them. Really understanding this will require not only that you understand why your answer is incorrect‚ but also why you chose it in the first place. Were you confused
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