submarine canyon

(redirected from Undersea canyon)

submarine canyon

[¦səb·mə′rēn ′kan·yən]
(geology)
Steep-sided valleys winding across the continental shelf or continental slope, probably originally produced by Pleistocene stream erosion, but presently the site of turbidity flows.
References in periodicals archive ?
The big wave rider of Braunton, Devon, heard an Atlantic storm was predicted and headed straight to Nazare where an undersea canyon creates giant rollers.
Added to this is the fact that Nazare has a 1,600-foot-deep undersea canyon, which points like an arrow toward the town, and there are enough scientific reasons to explain the giant waves that can strike awe into those who set out to capture them.
But the formation of Monterey's undersea canyon has left scientists puzzled.
At least 150 kilometers short of their destination, the sonar revealed a previously unknown undersea canyon deep enough to swallow an 85-story skyscraper.
FAR OUT The location of the head of an undersea canyon often determines how frequently its turbidity flows occur.
Researchers are studying undersea canyons with a variety of tools.
Undersea canyons are some of Earth's unsung geological masterpieces.
However, along North America's eastern coast, where continental shelves typically are wide and have gentle slopes, the heads of undersea canyons usually lie many kilometers offshore.
block exploration at 31 undersea canyons and will prevent drilling across 3.8 million acres of federal waters.
Although the processes may be much different, it would be interesting to compare the height and relative size of the depositions within Mars' channels-rivers versus undersea canyons.