Soil How much soil is there?

How is soil formed?

Does soil come in different sizes?

Soil sizes:

Soil sizes: Sand: 0.05 to 2.0 mm diameter

Soil sizes: Sand: 0.05 to 2.0 mm diameter Silt: 0.002 to 0.05 mm diameter

Soil sizes: Sand: 0.05 to 2.0 mm diameter Silt: 0.002 to 0.05 mm diameter Clay: < 0.002 mm diameter

What are the layers of soil on top of the lithosphere?

Layers of soil (horizons)

Layers of soil (horizons) “O” horizon: top layer of litter (leaves, decaying plants, etc.)

Layers of soil (horizons) “O” horizon: top layer of litter (leaves, decaying plants, etc.) “A” horizon: topsoil that contains humus and minerals.

Layers of soil (horizons) “O” horizon: top layer of litter (leaves, decaying plants, etc.) “A” horizon: topsoil that contains humus and minerals. “B” horizon: subsoil such as clay, loam, or silt.

Layers of soil (horizons) “O” horizon: top layer of litter (leaves, decaying plants, etc.) “A” horizon: topsoil that contains humus and minerals. “B” horizon: subsoil such as clay, loam, or silt. “C” horizon: weathered parent rock and glacial deposits.

Layers of soil (horizons) “O” horizon: top layer of litter (leaves, decaying plants, etc.) “A” horizon: topsoil that contains humus and minerals. “B” horizon: subsoil such as clay, loam, or silt. “C” horizon: weathered parent rock and glacial deposits. “R” horizon: Un-weathered parent rocks.