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Sea Stack-a small island close to shore, once connected to the mainland. Sea Arch-a natural arch eroded by waves. Sea Cave-A cave on a beach or headland that was formed by constant erosion from waves. Sometimes under water at high tide. Sea-Cliff: A cliff that meets the ocean. .
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Sea Stack-a small island close to shore, once connected to the mainland.
Sea Cave-A cave on a beach or headland that was formed by constant erosion from waves. Sometimes under water at high tide.
Headland-A body of land that juts into the ocean and is surrounded by water on three sides.
Chesapeake Bay: A drowned River Valley During last glaciation, Sea level was lower and rivers Cut valleys through what is now The Chesapeake bay. When the Glaciers melted, sea Level rose and flooded the River valleys. Sydney Harbor in Australia and The Hudson Bay in New York Are also drowned river valleys.