Top surface soil. Udecomposed organic debris and humus
eluvial zone. Second layer down. a leached mineral horizon with a lot of organic matter. Dark in color
Eluvial zone. 3rd layer down. A lighter colord layer representing maximun leaching.
Zone of accumulation for leaching materials such as clay, iron aluminum, silica. 4th lalyer down. Illuvial Zone.
Unaltered, unconsolidated parent material. 5th layer down. Illuvial zone
Hard bedrock. Illuvial zone. 6th and deepest layer
North america Soil Horizon