Author Question: When a large amount of dense water sinks at polar ocean basins, the same quantity rises elsewhere in ... (Read 56 times)

swpotter12 · **on:** Aug 22, 2018

When a large amount of dense water sinks at polar ocean basins, the same quantity rises elsewhere in the world ocean.
Indicate whether the statement is true or false

Question 2

What are submarine canyons and how are they formed?

miss.ashley · **Reply #1 on:** Aug 22, 2018

Answer to Question 1

True

Answer to Question 2

A submarine canyon is a canyon that cuts into the continental shelf and continental slope often ending on the deep seafloor in a fan-shaped wedge of sediment. Submarine canyons usually travel at right angles or perpendicular to coastlines and are located on continental margins. As similar to canyons on land, submarine canyons are created by erosion. The mass movement of sediment on the ocean floor is called turbidity current. Turbidity currents occur when turbulence mixes sediment into water above a sloping bottom (that is, on continental shelves or slopes). The steeper the slope, the faster the denser turbidity current will flow, sometimes reaching speeds of 17 miles per hour. Over long periods of time, these abrasive turbidity currents can carve canyons into the continental shelf.