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chapter 2 test
chapter 2 test
21
Geology
Undergraduate 2
02/17/2011

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Term
Continental Shelf
Definition
a shallow submarine platform at the edge of a inclines very gently seaward at angle of oil vary in which
Term
Continental Margin
Definition
ocean floor that separates oceanic & continental crust
Term
Mid-Oceanic ridges
Definition
a giant undersea mountain range the extends around the world like the seams on a baseball. Made mosty of basalt
Term
Seamounts
Definition
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
Term
Guyouts
Definition
are flat-topped seamount found mostly in the western pacific ocean
Term
Active continental margin
Definition
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.
Term
What is ophiolite?
Definition
Term
What are the tree layers of the oceanic crust? describe the compositions of the oceanic crust.
Definition
Term
Continental slope
Definition
a relatively deep slope that extends from a depth of 100-200 meters at the edge of the continental shelf down to oceanic depths.
Term
Rifft Valley
Definition
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.
Term
Passive continental margin
Definition
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
Term
Ophiolite
Definition
a distinctive rock squence found in many mountain ranges on continents.
Term
Reef
Definition
Wave resistant ridges of coral, algea, &  other calcareous organisms. From in warm, shallow sunlit water. Stands above surrounding sea floor
Term
3 layers of oceanic crust
Definition

- marine sediment

-layer 2 pillow basalt overlying dikes of basalt

-layer 3 thought to consist of silk like gabbro bodies

Term
Fringing reef
Definition
flat table like reefs attached directly to share
Term
Barrier reefs
Definition
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.
Term
Atolls
Definition
Term
Formation of atolls
Definition
Term
Oceanic trench
Definition
Term
Pelagic sediment
Definition
Term
Exclusive Economic zone
Definition
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