Weathering, erosion, and deposition
Ryan Davis and Carter Towers.
A delta is formed by a river flowing through the land and eroding it.
A glacier is formed by wind blowing against the ice and then breaking and flowing away and being deposited somewhere else.
A canyon is formed by wind blowing into the rocks causing them to erode and water flows through the rocks causing them to erode and make a canyon.
The sand gets weathered away and much of the sand forms a dune.