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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).
Organisms that live on the ocean floor may be responsible for keeping manganese nodules from being buried in
Sediments which are poorly sorted and made of a variety of minerals could have been deposited by:
All of the following are lithogenous sediments
a. beach sand.
c. glacial deposits.
d. illite clays.
e. volcanogenic particles.
All of the following are hydrogenous sediments
c. manganese nodule.
The element found in some sediments which suggest that a meteorite or asteroid impact occurred nearby is:
The most likely place to find abundant manganese nodules is on the
abyssal plain far from a continent
In contrast to manganese nodules which form on the abyssal plain, phosphate-rich nodules form in:
intermediate to shallow depth water
A pelagic clay contains lots of material that settle to the seafloor through the water column and are:
less than 30% biogenous material.
A very important way to increase the settling rate of fine particles in the open ocean is via:
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