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20 Cards in this Set
- Front
- Back
Lithogenous sediments are
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made of material derived from pre-existing rock material
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which of the following is the most fine-grained sediment?
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abyssal clay
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all of the following are examples of sediment transporting media; except:
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levitation
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in sediments, what does the Wentworth scale describe?
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grain size
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how is sediment transported from the shore out to the continental rise?
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by turbidity currents
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microscopic shells that create biogenous sediment on the sea floor are called
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tests
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beneath the calcite compensation depth (CCD)...
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calcium carbonate dissolves in seawater
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Calcareous ooze is associated with ________ surface water conditions, and siliceous ooze is associated with ________ surface water conditions.
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warm; cool
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Deep sea oozes are
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all of the above.
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Most chalk is made from
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coccoliths
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The only way for siliceous ooze to be preserved in the ocean is
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to have it accumulate faster than it dissolves.
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True or False? Because they tend to move downslope, most lithogenous sediments are deposited in abyssal plains.
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false
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True or False? The calcite compensation depth (CCD) represents the depth where wave action ceases to form calcareous oolites
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false
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True or False? Black volcanic beach sand is a type of hydrogenous sediment.
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false
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The similarity found in marine microbe populations near the ocean surface and on the ocean floor, despite the 10 to 50 years it takes for an individual organism to sink to the abyssal depths, can be explained by
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being concentrated in fecal pellets.
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Where are most modern-day calcareous oozes found in the ocean?
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along the mid-ocean ridge beneath warm surface waters
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Manganese nodules are NOT
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a type of foraminifer.
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Which of the following marine organisms lives in cold, polar waters?
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diatoms
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Which of the following is the most abundant component by weight for deep-ocean sediments?
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clay
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The Deep Sea Drilling Project (DSDP) confirmed that
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all of the above are true
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