There are other factors that may cause weathering such as humidity, pollution, acid rain, and wind. 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. Caves are also products of chemical weathering. All in all, the surface environment, grain size, and the climate control the rate of chemical weathering. Rivers, mainly fast moving rivers erodes the land by carrying sediment away from one location and depositing it in another.
Gravity moves water down, degrading plains and other landforms over time.
Deltas are formed where running water moves into standing water. This slow moving erosional force has formed the Missouri River Valley. Tributaries are bodies of water which flow into a larger river. Fluvial landscape' is the landscape formed by rivers. Rivers, at a certain stage of development move back and forth in a snake-like pattern causing erosion and deposition. and forth in a 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.