| A | B |
|---|
| Horizon A | dark layer of accumulated organic matter |
| Horizon B | just below topsoil, also know as subsoil |
| Horizon C | not weathered enough to call soil |
| Horizon R | underlying bedrock such as granite or shale |
| Horizon E | usually light due to leaching out of minerals |
| Horizon O | made up of decomposed and undecomposed organic matter |
| parent material | the original material soil is created from |
| subsoil | second soil layer also known as horizon B |
| topsoil | another word for horizon A |
| texture | word used to describe the feel and look of soil |
| clay | smallest granules, holds lots of water |
| sand | large grainy granules |
| silt | medium grain size |
| leaching | the process that takes out the minerals in soil due to water running through |
