Fluvial terrace
Depositional terrace is a terrace that the tread represents the surface of a valley fill. Valley filling occurs when the amount of sediment produced in a basin exceeds the amount that the river system can carry away. It is usually triggered by glacial outwash, climate change, or change in base level, slope, or load caused by rising water level. Depositional terrace is climatically controlled, whereas erosional terrace is tectonically controlled.