link here  | |  tools  |  share:
photo size: medium 640 new

view large
Abrupt texture change (Figure 1).
Abrupt texture change (Figure 1).

Abrupt textural change.—A diagnostic soil characteristic of mineral soils defined as a considerable increase in silicate clay content within a short vertical distance (<7.5 cm) between the epipedon and an underlying argillic, kandic, glossic, or natric subsoil horizon. The required clay increase varies depending on the clay content of the epipedon. Where present, this feature significantly restricts the downward movement of water. From the standpoint of soil genesis, it generally suggests that the soil formed on a relatively stable geomorphic surface of significant age.

Figure 1.—The Chilcott series (fine, smectitic, mesic Abruptic Xeric Argidurids) have an abrupt texture change at a depth of about 8 inches with an estimated clay increase of 30 percent within a vertical distance of 1 to 3 inches (upper boundary of 2Bt horizon). The Chilcott series consists of moderately deep to duripan, well drained soils with slow permeability that formed in a thin mantle of loess and silty alluvium from loess and weathered volcanic ash over loamy or sandy and gravelly alluvium from igneous materials.

© All Rights Reserved
Taken on: November 29, 2024
Tags: Everybody's photos tagged with Glossary of Soil Survey Terms Glossary of Soil Survey Terms Everybody's photos tagged with environment environment Everybody's photos tagged with Pedology Pedology more » Everybody's photos tagged with soil soil Everybody's photos tagged with Soil Science Soil Science Everybody's photos tagged with Soil Survey Soil Survey Everybody's photos tagged with Soil taxonomy Soil taxonomy Everybody's photos tagged with USDA-Natural Resources Conservation Service USDA-Natural Resources Conservation Service Everybody's photos tagged with USDA-NRCS USDA-NRCS Everybody's photos tagged with U.S. Soil Taxonomy U.S. Soil Taxonomy Everybody's photos tagged with John A. Kelley John A. Kelley Everybody's photos tagged with Craig Ditzler Craig Ditzler Everybody's photos tagged with Soil Correlation Soil Correlation Everybody's photos tagged with Abrupt texture change Abrupt texture change Everybody's photos tagged with Chilcott Chilcott Everybody's photos tagged with Chilcott soil Chilcott soil « less
Sets appears in:   • Glossary of Soil Survey Terms [DRAFT]   
Stats: 196 views
Abrupt texture change (Figure 1).

go back

Link to this photo view:
Link to this photo large view: