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WATER. RILL—LONG NARROW TRENCH OR VALLEY FORMED DURING SOIL EROSION. STREAM—SMALLER BODY OF WATER FLOWING IN A CHANNEL. RIVER—LARGE BODY OF WATER THAT WILL EVENTUALLY EMPTY INTO THE SEA OR OCEAN AMAZON RIVER.
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RILL—LONG NARROW TRENCH OR VALLEY FORMED DURING SOIL EROSION
RIVER—LARGE BODY OF WATER THAT WILL EVENTUALLY EMPTY INTO THE SEA OR OCEAN AMAZON RIVER
Alluvial fan--A fan-shaped mass of sediment, especially silt, sand, gravel, and boulders, deposited by a river when its flow is suddenly slowed. Alluvial fans typically form where a river pours out from a steep valley through mountains onto a flat plain. Unlike deltas, they are not deposited into a body of standing water.
TRIBUTARY— A RIVER OR STREAM THAT FLOWS INTO ANOTHER STREAM, RIVER OR LAKE (BODY OF WATER)
FLOOD PLAIN--the flat area bordering a river, composed of sediment deposited during flooding
OXBOW LAKE—A STAGNANT LAKE THAT IS FORMED ALONGSIDE A WINDING RIVER