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The fourth layer is the unconsolidated material that was once the parent material. Due to it being so far removed from most biological activity and weathering, this layer retains most of the characteristics of the parent material.
The fourth layer is the unconsolidated material that was once the parent material. Due to it being so far removed from most biological activity and weathering, this layer retains most of the characteristics of the parent material.
Parental material, is the material from which the soil originated. This can range from bedrock, sand, till, or any combination of these materials depending on the region.
Parental material, is the material from which the soil originated. This can range from bedrock, sand, till, or any combination of these materials depending on the region. Over time, erosion and weathering causes larger rocks to brake down into smaller particles and eventually soil.
[[category:geology]]
[[category:geology]]