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
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