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Chapter 10

The Sea Floor and Continental Margins

QuestionAnswer
What is a continental shelf The edge of a continent that lies under the ocean
Which features CANNOT be observed on a seismic-reflection profile Orientation of rock layers, shape of the seafloor, folds, and faults
What information can be determined directly by analyzing drill cores? The type of sediment on the seafloor, the type of rock on the seafloor, the rate of sediment deposition.
Which of the following is associated with mid-ocean ridges? As two oceanic plates move apart, solid rock and magma rise to occupy the space between the plates
What is an abyssal plane? An abyssal plain is one that occurs underwater, generally just along the edge of a continent and is almost entirely flat.
The deepest parts of the seafloor are Ocean trenches
The shallowest parts of the seafloor are Mid-ocean ridges
What rock type forms oceanic plateaus? Basalt
What do the island chains of Hawaii, Tahiti, and Tristan de Cunha have in common They formed from hot spots
Example of island arc Japanese islands
What processes can occur in front of or behind some island arcs? A trench rollback or back-arc rifting
Island arcs form in association with what type of tectonic setting? Ocean-ocean convergent
Sea formed when subduction jumped or shifted outward from the continent Bering Sea
The Sea of Japan formed as a deep basin between Asia and Japan because of: Back-arc seafloor spreading
What sea was formed by rifting or seafloor spreading? Red Sea
What sea was formed by loading of thrust sheets of the Zagros Mountains? Persian Gulf
Why did the Great Barrier Reef in Australia grow upward, forming the largest organic structure on Earth? The sea level rose
Created by: user-1765399
 

 



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