submarine canyon

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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 creature was swimming over a deep sea canyon on the northern edge of the Bay of Biscay.
The Deep Sea Conservation Coalition (DSCC), a group of more than 50 environmental and other groups dedicated to protecting cold-water corals and vulnerable deep-sea ecosystems, reports that trawlers today are capable of fishing deep sea canyons and rough seafloors that were once avoided for fear of damaging nets.
These Sanctuaries encompass deep coral gardens, near-shore coral reefs, whale migration corridors, deep sea canyons, historic shipwrecks and even underwater archeological sites.