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15 Cards in this Set
- Front
- Back
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portion of the seafloor adjacent to the contintents. it may include continental shelf, slope and rise
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continental margin
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the gently sloping surface at the base of the continental slope
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continental rise
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the glently sloping submerged portion of the continental margin, extending from the shoreline to the contiental slope
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continental shelf
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the steeep gradient that leads to the deep ocean floor and marks the seaward edge of the continental shelf
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continental slope
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the rigid outer layer of earth, including the crust and upper mantle
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lithosphere
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region in the upper mantel (beneath lithosphere) where rocks melt to form magma.
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asthenosphere
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about 5 miles thick, composed mostly of basalt
high density |
oceanic crust
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about 5-40 miles thick, consists of many different rock types
low density |
continental crust
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in any undeformed sequence of sedimentary rocks, each bed is older than the one above and younger than the one below
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law of superposition
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a rock or fault is younger than any rock or fault through which it cuts (whatever is cut is the older event)
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law of cross cutting relations
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time perid can be recognized by its fossil content
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law of faunal succession
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everything that happens today, we can assume happened in the past
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principle of uniformitariansim
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very level area of the deep ocean floor, usually laying at the foot of the continental rise
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abyssal plain
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the portion of the seafloor what lies between the continental margin and oceanic ridge system
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deep ocean basin
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a narrow elongated depression of the seafloor
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deep ocean trench
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