Soil profile
This soil profile shows the different soil layers (O horizon, A horizon, B horizon, and C horizon) found in typical soils.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, The Soil. October 17, 2013."
http://cnx.org/content/m44715/latest/Figure_31_02_02.png
OpenStax CNX
CC BY 3.0.
