an area where water flows over a vertical drop after rock is eroded away.

A delta is the area where water flows into a larger source

a hollowed out underground area that was formed from weathering

an underground mineral deposit formed by water leaking through cracks.

Sea stacks are segments of rock that have been disconnected from land via erosion.

Barrier islands are long sections of sand that arn't connected to land.

desert varnish is a thin layer of clay minerals

Sand dunes are built by wind folow, and sand particals.

A Hanging Valley is a small, shalow valley careved out by a glacier

A kettle lake is teh stopping point of a glacier, formed when a glacier melts.