Key to Subgroups
ACBD. Other Aquorthels that have either:
1. Organic soil materials that are discontinuous at the surface; or
2. Organic soil materials at the surface that change in thickness fourfold or more within a pedon. Ruptic-Histic Aquorthels
Description of Subgroups
ACBD. Ruptic-Histic Aquorthels.—These are the Aquorthels that have an organic layer at the surface that is either discontinuous or thins and thickens because of periglacial microrelief. These soils are common in Alaska, Canada, and Siberia.
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