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Which of the following contains silica (SiO2) ?


A) coccolithophores
B) corals
C) foraminiferans
D) phosphorites
E) radiolarians

F) A) and D)
G) B) and C)

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E

The major force bringing continental sediments to the open ocean is (are) :


A) glaciers.
B) neritic currents.
C) rivers.
D) turbidity currents.
E) wind.

F) C) and E)
G) A) and D)

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Phosphate nodules are found on the continental shelf.

A) True
B) False

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tektites


A) biogenous sediment
B) cosmogenous sediment
C) hydrogenous sediment
D) terrigenous sediment

E) A) and B)
F) A) and C)

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Which of the following is not an important control on oceanic sediment accumulation?


A) degree of preservation
B) dilution
C) input from other sediment types
D) rate of deposition
E) All of the above factors are important.

F) B) and C)
G) B) and E)

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E

Refer to the figure below illustrating the world-wide distribution of marine sediments.Different areas of ocean sediments are indicated by different numbers.Use these numbers to answer the questions below. Refer to the figure below illustrating the world-wide distribution of marine sediments.Different areas of ocean sediments are indicated by different numbers.Use these numbers to answer the questions below.    -Biogenous sediments are indicated by the number(s) : A) 1. B) 2 & 3. C) 2 & 4. D) 2,3,& 4. E) 2,3,4,& 5. -Biogenous sediments are indicated by the number(s) :


A) 1.
B) 2 & 3.
C) 2 & 4.
D) 2,3,& 4.
E) 2,3,4,& 5.

F) All of the above
G) A) and E)

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Match the term or person with the appropriate phrase.You may use each answer once,more than once or not at all.

Premises
tektites
halite
silaceous ooze
diatomaceous ooze
coccolithophores
metal sulfides
oolites
abyssal clay
stromatolites
manganese nodules
Responses
cosmogenous sediment
biogenous sediment
hydrogenous sediment
terrigenous sediment

Correct Answer

tektites
halite
silaceous ooze
diatomaceous ooze
coccolithophores
metal sulfides
oolites
abyssal clay
stromatolites
manganese nodules

A very important way to increase the settling rate of fine particles in the open ocean is via:


A) carbonate dissolution.
B) deposit feeders.
C) fecal pellets.
D) precipitation.
E) wind.

F) B) and D)
G) C) and E)

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The element found in some sediments which suggest that a meteorite or asteroid impact occurred nearby is:


A) iridium.
B) manganese.
C) strontium.
D) uranium.
E) yttrium.

F) A) and E)
G) C) and E)

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Manganese nodules are an example of a:


A) biogenous sediments.
B) cosmogenous sediments.
C) hydrogenous sediments.
D) terrigenous sediments.
E) volcagenic sediments.

F) C) and D)
G) All of the above

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Calcium carbonate is most likely to dissolve in water with which characteristics?


A) low carbon dioxide and warm temperatures
B) lots of carbon dioxide and cold temperatures
C) lots of carbon dioxide and warm temperatures
D) low pressure and warm temperatures
E) low pressure and cold temperatures

F) All of the above
G) B) and D)

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Sediments produced by plants and animals in the sea called:


A) cosmogenous.
B) biogenous.
C) hydrogenous.
D) terriginous.
E) volcagenic.

F) C) and D)
G) A) and B)

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Sediments derived from weathered rock and volcanic activity are called biogenous sediments.

A) True
B) False

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False

stromatolites


A) biogenous sediment
B) cosmogenous sediment
C) hydrogenous sediment
D) terrigenous sediment

E) A) and C)
F) None of the above

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The deposition of radiolarian oozes is affected by the carbonate compensation depth.

A) True
B) False

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Sediments which are poorly sorted and made of a variety of minerals could have been deposited by:


A) a glacier.
B) a river delta.
C) turbidity currents.
D) a volcanic eruption.
E) the wind.

F) C) and E)
G) B) and D)

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In general,polar neritic sediment has more:


A) clay than in temperate waters.
B) coral debris than in tropical waters.
C) rock and gravel than in tropical waters.
D) shell fragments than in temperate waters.
E) silt and sand than in tropical waters.

F) A) and B)
G) None of the above

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silaceous ooze


A) biogenous sediment
B) cosmogenous sediment
C) hydrogenous sediment
D) terrigenous sediment

E) All of the above
F) C) and D)

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Calcareous shells will not accumulate on the ocean floor when the water depth exceeds about 4500 meters (around 15,000 feet).

A) True
B) False

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The organisms in this photograph would most likely produce oceanic sediments that are: The organisms in this photograph would most likely produce oceanic sediments that are:   A) calcareous. B) cosmogenous. C) lithogenous. D) neritic. E) siliceous.


A) calcareous.
B) cosmogenous.
C) lithogenous.
D) neritic.
E) siliceous.

F) C) and D)
G) A) and B)

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