The type of marine sediment that forms the thickest deposits worldwide is:
a. neritic siliceous sediment deposits.
b. neritic coarse lithogenous sediment deposits.
c. abyssal clay deposits.
d. manganese nodule deposits.
e. pelagic biogenous calcareous deposits.

b. neritic coarse lithogenous sediment deposits.

Explanation:

Sediments are formed from different sources, both terrestrial and aquatic and are deposited by the movement of water, glaciers and wind. The type of deposits formed from erosion of terrestrial materials are known as Lithogenous sediments. The range in size from fine to coarse particles.

Neritic and Pelagic refer to different depths in an ocean. While neritic refers to the area close to the coast, Pelagic refers to the the deep ocean. Neritic, coarse lithogenous deposits are found on shallow ocean floor s as well as along the coast, and make the thickest deposits worldwide.