Many landforms were created by weathering and erosion. For example most valleys were created by receding ___________while several sandstone columns was created by ___________. When the Colorado River cuts through Stone clips, it created the _____________ and the Mississippi River delta was created by the process called ____________.

Many landforms were created by weathering and erosion. For example, most valleys were created by receding glaciers while several sandstone columns were created by wind erosion. When the Colorado River cuts through stone cliffs, it created the Grand Canyon, and the Mississippi River delta was created by the process called deposition.