GL101 Lecture Notes - Lecture 15: Subsidence, Slot Canyon, Suspended Load
Document Summary
Sediment tends to become finer-grained silt and clay sediment downstream. Meandering is common in the lower reaches of a river. The low velocity on the inside of a river curve promotes sediment deposition. Such a bar is called a point bar and usually consists of a series of arcuate ridges of sand or gravel. Delta a body of sediment deposited at the mouth of a river when the river"s velocity decreases. Sediment deposits may take the form of a bar, a ridge of sediment, usually sand and gravel, deposited in the middle or along the banks of a stream. Bars are formed by deposition when a stream"s discharge or velocity decreases. Placer deposits are found in streams where the running water has mechanically concentrated heavy sediment. The heavy sediment is concentrated in the stream where the velocity of the water is high enough to carry away lighter material but not the heavier sediment.
