building up and breaking down

I like so much things of this topic because it explains how mountains the differnt tipe of mountains and the craters.
Craters here they explained so much things of the craters like his layers that are the canyon,buttle,plateau,mesa.So much canyons have rivers.
The ferent layers of the soil the soil have 3 layers the horazon a horizon b and horizon c
the horizon a in also called topsoil and allot of humus, the horizon b is also called subsoil the roots penetrait this layer and have a little bit of humus and the horizon c is is slightly weathered rock and also is the bedrock.
I would like that yoou enjoy this summary