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When you have longshore currents that transport the sand along a beach, they can create a spit where there is a projection along the coast. Spits develop from a wave train that is oblique to the shore causeing the sand to be deposited longitudinally projecting from the protruding point on the shore. They are attached to the shore at one end.

Trombolos can occur when currents create a bar from the beach out of a large quantity of oceanic sediment called a stack. A trombolo is somewhat like a large ripple created from the stack accumulation.

The are alike in a general sense of oceanic deposits but are very different in that the currents are oblique (tombolo) and more perpindicular (spit).

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11y ago

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