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a shallow submarine platform at the edge of a inclines very gently seaward at angle of oil vary in which |
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ocean floor that separates oceanic & continental crust |
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a giant undersea mountain range the extends around the world like the seams on a baseball. Made mosty of basalt |
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conical undersea mountain that rise 1, 00 meter or more above the sea floor some rise above sea level to from island. Scattered on the flanks of the midocean ridge & other parts of the sea floor including abyssal plains |
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are flat-topped seamount found mostly in the western pacific ocean |
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Active continental margin |
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Typically characterzed by earthquakes & young mountain belt & volcanoes on land consist of continental shelf continental slop & an oceanic trench lacks a continental rise & an abyssal plain & is associated with convergent boundaries. |
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What are the tree layers of the oceanic crust? describe the compositions of the oceanic crust. |
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a relatively deep slope that extends from a depth of 100-200 meters at the edge of the continental shelf down to oceanic depths. |
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runs down the crust of a mid ocean ridge, present in atlantic & indian oceans but not the pacific. Bounded by normal faults diverging plate doundaries. |
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Passive continental margin |
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includes a continental shelf, continental rise & extend down to an abyssal plain. Develops on geologically quiet coast that lack earthquakes, volcanoes & young mountain belts. Board must parts of the Arctic & Indian oceans & a Few parts of the pacific |
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a distinctive rock squence found in many mountain ranges on continents. |
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Wave resistant ridges of coral, algea, & other calcareous organisms. From in warm, shallow sunlit water. Stands above surrounding sea floor |
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3 layers of oceanic crust |
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- marine sediment
-layer 2 pillow basalt overlying dikes of basalt
-layer 3 thought to consist of silk like gabbro bodies |
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flat table like reefs attached directly to share |
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parallel the shore but are separated from it by wide, deep lagoon has relatively quiet water because the reef shelters it by absorbing the energy of large, breaking waves. |
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