Prince William Sound‚ 75 miles east of Anchorage. This earthquake was and still is the second larges earthquake ever recorded (Christensen). The plates involved In this major earthquake were the Pacific plate and North American plate. This subduction zone is know as Aleutian-Alaska megathrust zone (Sokolowski). This region was known for its active plate tectonics‚ but this earthquake did come as a surprise to the public and scientists in the area. About 200-250‚000 kilometers squared of the earths
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Geological Hazards Plate Tectonics- Theory Alfred Wegener Crust- Solid Mantle- Liquid Outer Core- Liquid Inner Core- Solid (Too much pressure for it to be liquid. Doesn’t have the space to expand.) Convections cells- Due to the pressure in the earth’s core‚ when it heats up the pressure causes the heat to push against the earth’s mantle‚ triggering it to move‚ caused by convection currents. Convection Currents- it’s a concept of what causes the plate tectonics to move. http://www.scotese
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Tectonics and Continental Drift Past and Present Locations Abstract When we look at our earth’s surface now it has seven continents‚ and five of them are divided by the oceans that surround them. In 1912 Alfred Wegner (1880-1930)‚ came up with a theory called the continental drift; stating that over three hundred years ago all seven continents were once one super continent called Pangaea. Wegner tried to convince other scientists and geologist for many years that the continents
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morphology. Colonies can be classified according to their colour‚ form‚ elevation‚ margin and size. Pure cultures of microorganisms are those that are uniform and are of the same descendants of the same organism. The isolation of colonies by streak plate technique allows the obtainment of pure cultures which can be studied further. Good quality aseptic technique and proper sterilisation are a required to ensure that all samples produced are free from unwanted organisms that can lead to contamination
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(accessed March 23‚ 2013). Murano‚ Grace. 10 Geological Wonders you didnt know. 27 March 2009. http://www.oddee.com/item_96619.aspx (accessed March 23‚ 2013). National Oceanic and Atmospheric Administration. The Puerto Rico Trench: Implications for Plate Tectonics and Earthquake and Tsunami Hazards. http://oceanexplorer.noaa.gov/explorations/03trench/trench/trench.html (accessed March 23‚ 2013). Portland Cement Association. Cement & Concrete Basics: Aggregate. http://www.cement.org/basics/concretebasics_aggregate
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landforms have. For instance‚ lava domes may be shaped like hills‚ but the two landforms have very different origins. The major forces that produce landforms are erosion‚ plate tectonics and volcanic activity. Different physical forces can create similar landforms‚ such as the case of rift valleys (created by the separation of tectonic plates) and river valleys (created by erosion). Understanding what created a landform is crucial to explaining many of the smaller features within the landform (such as the
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Bhavna Sharma EST 330 TA Notes Week 2 Predictions of Natural Disasters Most disasters are unpredicted 99% of the time With earthquakes‚ history will tell us that one is possible‚ but it can’t say when one will occur‚ or at what time‚ or at what magnitude With tropical cyclones we know of the existence of a storm about 7 or 8 days in advance‚ but there is still great uncertainty about exact location of landfall until 24 hours before. Useful tools: satellites- ability to see where tropical
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can the movements of the continents be explained‚ or how do deep ocean trenches affect us? The three main theories that explain how these things work are sea-floor spreading‚ continental drift‚ and plate tectonics. These are the theories that give us explanation as to why the continents move‚ how plate tectonics work‚ etc. These theories were formed by different scientists and with different forms of evidence‚ some scientists used one of the other two theories to support theirs‚ and one theory is
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crust‚ & continental crust. Plates: The lithosphere broken up into individual pieces. They move over the mantles Asthenosphere. Movement of Earth’s Plates:The plates move due to the mantles CONVECTION CELLS: warm material rises toward surface‚ cools&descends back into the interior. Creating volcanoes‚ earthquakes‚ MTNS. Crust: Earth’s outer most layer 2typesContintinential: thick w/silicon‚aluminum-Oceanic crust:Thin denser w/ dark igneous rocks (basalt/gabbro) PLATE TECHTONIC THEORY:The lithosphere
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native only to itself. The purpose of this essay is to discuss the geological history of the formation‚ as well as the biological origins‚ of New Zealand. It will also discuss how the major land-forming processes of volcanism‚ glaciation and tectonic plates have shaped the country and defined it’s native flora and fauna. Eighty-five million years ago the landmass now known as New Zealand broke away from the supercontinent Gondwana. This massive landmass moved into the Pacific Ocean and eventually became
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