http://www.ucmp.berkeley.edu/tectonics/atlantic.html
(this is an interesting URL.. be sure to clilck on the word Jurassic (in red) to get more information .
http://www.whoi.edu/oceanus/viewArticle.do?id=2502
This is the most interesting......http://en.wikipedia.org/wiki/Oceanic_crust
2006-06-05 16:24:32
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answer #1
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answered by Anonymous
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Ocean crust is the part of Earth's lithosphere which surfaces in the ocean basins.
It is thinner, generally less than 10 kilometres thick, but more dense than the continental crust, or sial, having a mean density of about 3.3 grams per cubic centimeter. Ocean crust is composed of mafic basaltic rocks, or sima. Most of the present day oceanic crust is less than 200 million years old because it is continuously being created at oceanic ridges and destroyed by being pulled back under the continental crust in subduction zones by the convection currents in the lower mantle. Plate tectonics is the study of these processes.
2006-06-07 06:18:21
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answer #2
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answered by jas 2
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the crust of the earth that the ocean sits on
2006-06-05 21:55:08
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answer #3
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answered by c.a.s.o.m.e.s. 2
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That part of the crust containing the ocean basins that are composed mostly of basalt.
2006-06-06 12:32:20
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answer #4
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answered by Amphibolite 7
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Sima is oceanic crust, sial is continental crust
2006-06-05 22:09:25
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answer #5
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answered by Anonymous
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it is the thing we put all the yummy topping on before we put it in the ocean oven, need to melt the cheese!
2006-06-05 21:55:48
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answer #6
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answered by lotsofloveya 3
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