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Seafloor Notes

Definitions of parts of the sea floor.

CONTINENTAL MARGINregion of the sea floor that contains the shelf and slope
CONTINENTAL SHELFpart of the continent that is underwater
CONTINENTAL SLOPEwhere water deepens abruptly and the edge of the continental land mass drops off
OCEAN BASIN FLOORbegins where the slop ends, region made up of mountains, ridges, trenches, valleys, rifts, guyots, abyssal plains, and canyons plateau
ABYSSAL PLAINvast smooth areas on floor
TRENCHEScracks on the earth’s crust, deepest part of the oceans
GUYOTSflat topped volcanic mountains
RIFTa valley that runs along the center of a ridge
SEAMOUNTisolated mountain that rises more than 3000 ft. above the sea floor
MID-OCEAN RIDGEgreat undersea mountain ranges characterized by frequent earthquakes and volcanoes
ISLANDseamount that rises above the surface of the water
Water coverage on Earth75%

Penn Strandberg

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