Question

Distinguish the Abyssal plains and Ocean deeps.

Answer 1

S. No.	Abyssal plain	Ocean deeps
(i)	Abyssal plains are under water plains found on the deep ocean floor	These are the deepest part of the oceans.
(ii)	These plains extend from continental rise to the midoceanic ridges.	Trenches are the deepest part of the oceans. They occupy about 7% of the total relief of the ocean flour.
(iii)	Abyssal plains are usually covered by the thick layer of sediments composed of clay, silt and sand.	These are sediment free. So most trenches are Vshaped with steep sides.
(iv)	Abyssal hills, sea mounts, guyots,coral atoll, etc., are the characteristic features.	Epicentre of the great earthquakes is all found in the trenches.