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Divergent Plate Movement: Seafloor Spreading; Seafloor spreading is the movement of two oceanic plates away from each other (at a divergent plate boundary), which results in the formation of new oceanic crust (from magma that comes from within the Earth's mantle) along a a mid-ocean ridge.
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www.enchantedlearning.com/subjects/astronomy/planets/ea...
www.enchantedlearning.com/subjects/astronomy/planets/earth/Continents.shtml
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Plates 'float' on the molten rock magma. As the core of the Earth heats up the materials inside, the molten magma also gets heated up. The heat causes convection currents, a movement of rising and sinking caused by heat, inside the molten magma. ... There Are Basically Three Types Of Plate Movements:
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library.thinkquest.org/17701/high/tectonics/ptproc.html
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Contains an online archive of images of the Earth from the late Precambrian era over 60 million years ago. Features information on climate history and research. ... At each stop there is more information about each geological time period. ... License & Credit Information...
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www.scotese.com/earth.htm
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Find out how and why certain plates move and learn some of the theories that scientists have used to explain these movement ... Magma injection This hypothesis invokes the injection of magma at a spreading centre pushing plates apart and thereby causing plate movement.
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www.hartrao.ac.za/geodesy/tectonics.html
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The consequences of plate movement are easy to see around Krafla Volcano, in the northeastern part of Iceland. Here, existing ground cracks have widened and new ones appear every few months. From 1975 to 1984, numerous episodes of rifting (surface cracking) took place along the Krafla fissure zone.
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pubs.usgs.gov/publications/text/understanding.html
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The movement of the Juan de Fuca plate beneath the North America plate is in many respects similar to the movements of plates in South America, Mexico, Japan, and Alaska, where the world's largest earthquakes occur.
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vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_...
vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_plate_tectonics.html
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Wonderful animations of Plate Tectonics movement. Including gif, avi and mov formats. ... Plate tectonics animations ... There are a number of excellent sites dealing with the modern theory of plate tectonics. Here is a modest sample:
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www.ucmp.berkeley.edu/geology/tectonics.html
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This animation takes the average plate motion observed over the past one million years and projects it 100 million years into the future. The model does not account for continental collisions, subduction, or sea-floor spreading;
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www.classzone.com/books/earth_science/terc/content/visu...
www.classzone.com/books/earth_science/terc/content/visualizations/es0807/es0807page01.cfm?chapter_no=visualization
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