• Soil horizons are different layers of soil with depth.
  • The most weathering occurs in the top layer.
  • Each layer lower is weathered just a little bit less than the layer above.
  • Topsoil is usually the darkest layer of the soil.
  • The next layer down is the ā€œCā€™ horizon.
  • The C horizon is made of partially altered bedrock.
  • It is possible to identify the original rock type from which this soil formed.
  • Soil layers include topsoil, subsoil and the C horizon.
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