There are monuments in Luxor, Egypt that have remained visible for over 3500 years, but when the same ruins are sent to New York as a gift from the government in Egypt, the monument quickly is worn away and is no longer legible. All in all, the rate of chemical weathering is controlled by the surface environment, grain size, and the climate. Alluvium is all the sediment that is deposited by running water. Deltas are formed where running water moves into standing water. The Missouri River Valley has been formed by this slow-moving erosional force.
Tributaries are bodies of water which flow into a larger river.
These form valleys within a larger valley, leaving hills on each side. Fluvial landscape is the landscape formed by rivers. Rivers move back and forth in a snake-like pattern causing erosion and deposition. This may cause the river to become so tightly curved that the river may take a short cut across the corners and create a loop or an oxbow lake. An oxbow lake is the explanation for the creation of Lake Manawa and Carter Lake.