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Geographic Landforms. Key Terms and Definitions For Washington State History-7. Mountain. A landform that rises at least 1,000 feet above the surrounding area. Valley. An elongated depression, usually with an outlet, between bluffs, hills or mountains. Basin.
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Geographic Landforms Key Terms and Definitions For Washington State History-7
Mountain • A landform that rises at least 1,000 feet above the surrounding area.
Valley • An elongated depression, usually with an outlet, between bluffs, hills or mountains.
Basin • A depression like a bowl that is a circular or oval shape in the ground.
Plateau • An elevated plain or flat-topped region of considerable extent.
Peninsula • An elongated portion of land nearly surrounded by water and connected to a larger body of land.
Harbor • A water area nearly surrounded by land or seawalls forming a safe anchorage for ships.
Bay • A body of water that is partly enclosed by land and is smaller than a gulf.
Coastline • The line that forms the boundary between land and the ocean.
Strait • A narrow waterway between two larger bodies of water.
Island • Land that is surrounded by water.
Slough • A tidal waterway that creates a muddy marshland and usually connects other tidal areas.
Tributary • A stream or river that flows into a larger river.
Headwater • The source of a stream or river.
River Mouth • Where a stream or river flows into a sea, lake, reservoir or ocean.