The sentences below describe how the Grand Canyon formed. Put them in the correct order from oldest (1) to youngest/most recent (7). The sediments were compressed into sedimentary rocks.

The Colorado River cut down through the sedimentary rock layers to form the Grand Canyon.

There was a shallow ocean that deposited sediments.

Snow melt from the Colorado Rocky Mountains eventually formed the Colorado River.

Pacific ocean crust was pushed under the North American continent to create the Colorado Plateau (a high, flat area).

The mountains eroded down to very low hills.

There were ancient mountains taller than the Himalayan Mountains.