condition in which the earth's surface is worn away by the action of water and wind

the process by which one rock type changes into another rock type

material formed from decaying leaves and other organic matter

the layer of soil on the surface

the layer of soil between the topsoil and bedrock

The solid layer of rock beneath the soil

a layer of soil held together by the roots of grasses

process in which sediment is laid down in new locations

fine soil found on river bottoms

a very fine-grained soil that is hard when fired

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