It is further contoured by strong currents along the continental rise.
Sea floor sediments and characteristics quizlet.
Latin for hole bearers.
Terrigenous pelagic and hydrogenous.
Foraminifera f ə ˌ r æ m ə ˈ n ɪ f ə r ə.
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Terrigenous sediment is derived from land and usually deposited on the continental shelf continental rise and abyssal plain.
Sediments that accumulate on the seafloor provide information about ocean conditions at the time that the sediment was deposited changes in the composition of the seafloor sediment reflect changes in the depositional environment.
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The oldest sediments so far recovered by a variety of methods including coring dredging and deep sea drilling date only to the jurassic period not exceeding about 200 million years in age.
The sea floor and its sediments.
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There are three kinds of sea floor sediment.
And commonly an external shell called a test of diverse forms and materials tests of chitin found in some simple genera.
Informally called forams are single celled organisms members of a phylum or class of amoeboid protists characterized by streaming granular ectoplasm for catching food and other uses.
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Measurements of the thickness of marine sediments and absolute age determinations of such bottom material have provided additional evidence for seafloor spreading.
Melting icebergs carry sediments and when melted the sediments are deposited down onto the sea floor 3rd way sediments reach ocean basins wind carries volcanic ash dust and sand from desert into ocean and it sinks down.
However very little lithogenous sediments travel out to the deep ocean leaving the accumulation of biogenous sediments more available on the pelagic sea floor.
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The sea floor and its sediments.
