The origin of submarine canyons is not well understood, but most likely
A) is erosional, started by streams during periods when the sea level was lower.
B) is tectonic, and represents down-folds of rock within the continental shelf.
C) is organic, resulting from the activities of burrowing organisms.
D) is glacial, the work of glaciers depositing rock debris on the shelf.

Question

Quizplus · Accepted Answer

The current understanding is that submarine canyons are erosional features carved by rivers and streams during periods of lower sea level when the continental shelf was exposed. The canyons were then submerged as sea level rose. Tectonic activity can also contribute to the formation of submarine canyons, but erosion is considered to be the primary cause. Organic and glacial activity are not considered significant factors in the origin of submarine canyons.

The Origin of Submarine Canyons Is Not Well Understood, but Most