Question

The deep sea plains are also called ________ plains.
A.Continental shelf
B.Continental slope
C.Abyssal
D.None of these

Answer 1

Hint: A continental shelf is a part of a landmass that is lowered under a territory of generally shallow water known as a shelf ocean. A lot of these shelves have been uncovered during frigid periods and interglacial periods. The shelf encompassing an island is known as a separate shelf.

Complete answer: A deep plain is a submerged plain on the profound sea floor, normally found at profundities between 3,000 meters (9,800 ft) and 6,000 meters (20,000 ft). Lying for the most part between the foot of a continental rise and a mid-sea edge, deep fields cover over half of the Earth's surface. They are among the flattest, smoothest, and least investigated areas on Earth.Abyssal fields are key geologic components of maritime bowls (different components being a raised mid-sea edge and flanking deep slopes).
Diagrammatic cross-segment of a maritime bowl, indicating the relationship of the deep plain to a continental rise and a maritime channel. Portrayal of the deep zone corresponds to other significant maritime zones.The making of the deep plain is the consequence of the spreading of the ocean bottom (plate tectonics) and the dissolving of the lower maritime covering. Magma transcends the asthenosphere (a layer of the upper mantle), and as this basaltic material arrives at the surface at mid-sea edges, it frames new maritime covering, which is continually pulled sideways by spreading off the ocean bottom.

So the correct answer is C.

Note: Deep fields result from the covering of an initially lopsided surface of maritime outside layer by fine-grained residue, mostly mud and sediment. A lot of this residue is saved by turbidity flows that have been diverted from the continental edges along submarine ravines into more profound water.