The Abyssal Plain

Question

The abyssal plain
A) Drains large river systems such as the Amazon River
B) Is an average of about 4,000 m deep
C) Actually has a slope of 3 degrees seaward
D) Never connects with an oceanic trench

Accepted Answer

The abyssal plain is a vast, flat, and deep part of the ocean floor, averaging about 4,000 meters (about 13,123 feet) in depth. It does not drain river systems, have a significant slope, or necessarily avoid connection with oceanic trenches.