on the continental shelf in deep trenches not far offshore
Of the following environments, where would you expect to find large amounts of lithogenous sediment? on the continental shelf on coral reefs that exist just below the water surface in deep trenches not far offshore along the mid-ocean ridge on the continental slope
A
A. siliceous ooze B. quartz sand C. rock fragments D. clay E. volcanic ash
pelagic deposit
A sediment sample dominated by microscopic lithogenous sediment grains would be classified as a ___________.
The ooze accumulates above the CCD and then is covered before being transported to deeper depths by sea floor spreading.
Which of the following conditions allows for calcareous ooze to be found beneath the CCD? Select only one answer.
Diatoms Radiolarians
Which of the following organisms are responsible for the creation of siliceous ooze? Foraminifers Diatoms Radiolarians Coccolithophores
quartz
The most abundant mineral in lithogenous sediments is __________.
well sorted
Sediments with all grains of about the same size are classified as __________.
associated with glacial deposits
Match the term or person with the appropriate phrase. ice rafting
associated with submarine canyons and deep-sea alluvial fans
Match the term or person with the appropriate phrase. turbidite
True
Texture refers to the size and shape of sediment particles.
True
Coastal sand dunes are usually well sorted due to winds.
lithogenous (terrigenous) sediment.
Sediment that begins as rocks on continents or islands is called:
a glacier.
Sediments that are poorly sorted were most likely deposited by:
lithogenous.
Sediments derived from pre-existing rocks on land are called:
manganese nodules coatings of metal sulfides near black smokers
Of the following sediments, which one(s) is/are considered hydrogenous? Of the following sediments, which one(s) is/are considered hydrogenous? manganese nodules abyssal clay black volcanic beach sand radiolarian ooze tests of foraminifers coatings of metal sulfides near black smokers
the biogenous component tends to be overwhelmed by the amount of lithogenous material derived from the nearby continent
Oozes are uncommon on continental margins because __________.
biogenous sediment
Match the term or person with the appropriate phrase. coccolithophores
biogenous sediment
Match the term or person with the appropriate phrase. siliceous ooze
True
The organisms that contribute to biogenous sediment are chiefly algae and protozoans.
False
Radiolarian tests are dissolved beneath the carbonate compensation depth.
False
Calcareous ooze is found in cooler waters at depth around the world.
foraminiferans
Which of the following contains calcium carbonate (CaCO3)?
low salinity
Calcium carbonate is most likely to dissolve in water with which characteristic?
D
A. coccolithophores B. diatoms C. foraminiferans D. oolites E. radiolarians
They all precipitate from water oversaturated in their respective minerals.
What do manganese nodules, metal sulfides, and evaporites all have in common?
hydrogenous sediments
Salt beds of the U.S. Gulf Coast are __________.
hydrogenous sediment
Match the term or person with the appropriate phrase. halite
True
Organisms that live on the ocean floor may be responsible for keeping manganese nodules from being buried in the sediment.
stromatolites.
All the following are examples of hydrogenous sediment except :
abyssal plain far from a continent.
The most likely place to find abundant manganese nodules is on the:
E
A. halite and other salts B. manganese nodules C. metal sulfides D. phosphates E. tektites
cosmogenous sediment
Match the term or person with the appropriate phrase. tektites
True
Tektites are glassy rock fragments created during impact events.
cosmogenous.
Sediments with an extraterrestrial origin are called:
tektites.
The particles found in some sediment that suggests that an extraterrestrial impact event are:
Abyssal clays are more abundant in the Pacific than the Atlantic because calcareous oozes dissolve before reaching the sea floor in the latter ocean basin.
Based on this data, choose the statement that offers the best explanation for the differences in sediment abundance between the Atlantic and Pacific basins. PICHHHA
clay
You take a sediment sample from the ocean floor at a depth of 5500 m. The area has low biological productivity and the CCD is at 4500 m depth. Your sample will probably consist of __________.
neritic.
Sediments found on continental margins are called:
less* than 30% biogenous* material.
Pelagic clays contain lots of material that settles to the seafloor through the water column and are:
they are primarily composed of calcareous deposits of biological origin.
All the following are true concerning neritic sediment deposits except :
All the above factors are important.
Which of the following is not an important control on oceanic sediment accumulation? Which of the following is not an important control on oceanic sediment accumulation?
4
Calcareous oozes are represented by the number(s): PICHHA q58
ALLLL
Marine sediments provide valuable clues about which of the following Earth history events? the climate on Earth millions of years ago movement of the ocean floor past catastrophes, such as major extinction events the ancient geographical locations of ocean basins previous ocean circulation patterns
Coal
Ocean sediments provide all the following mineral resources except :
hydrogenous sediment
Match the term or person with the appropriate phrase. metal sulfides