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| Description: Passive continental margins Found along most coastal areas that surround the Atlantic Ocean Not associated with plate boundaries Experience little volcanism and Few earthquakes Passive continental margins Features comprising a passive continental margin Continental shelf Flooded extension of the continent Varies greatly in width Gently sloping Contains oil and important mineral deposits Features comprising a passive continental margin Continental shelf Some areas are mantled by extensive glacial deposits Most consist of thick accumulations of shallow-water sediments Features comprising a passive continental margin Continental slope Marks the seaward edge of the continental shelf Relatively steep structure Boundary between continental crust and oceanic crust Features comprising a passive continental margin Submarine canyons and turbidity currents Submarine canyons Deep, steep-sided valleys cut into the continental slope Some are seaward extensions of river valleys Most appear to have been eroded by turbidity currents Features comprising a passive continental margin Submarine canyons and turbidity currents Turbidity currents Downslope movements of dense, sediment-laden water Deposits are called turbidites Picture Stats: Views: 875 Filesize: 208.92kB Height: 632 Width: 1397 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39455 |