CompuServe Messages

Kamron, >>They are located mainly around the perimeters of the continents where land basins drain into shallow basins above the shelf and continue over the shelf through the sediments at the continental bases. They look like erosion canyons in the sediments. Continuations of the land erosion marks in many cases. What you are describing are the canyons that eroded into the continental shelves during the most recent ice age. Sea level was as much as 300 feet lower then. This allowed the rivers to cut into the esposed surface and erode the canyons. River volume was much higher because of runoff from the glaciers. Jim