A tunnel-like structure created by a burrowing animal and filled with soil material from another horizon is called?

A tunnel-like structure created by a burrowing animal and filled with soil material from another horizon is called?

• A. Krotovina
• B. Caliche
• C. Mixture cavity
• D. Mammillated deposit

Answer: (A)

A tunnel-like burrow that is later filled with soil from a different horizon is called a krotovina. This feature records bioturbation by a burrowing organism, with the fill material often differing in texture or color from the surrounding matrix, making the burrow visible as a distinct pocket within the soil profile. Caliche is a cemented calcium carbonate horizon, not a burrow fill. A mixture cavity and mammillated deposit are not standard terms for this type of trace.

A tunnel-like burrow that is later filled with soil from a different horizon is called a krotovina. This feature records bioturbation by a burrowing organism, with the fill material often differing in texture or color from the surrounding matrix, making the burrow visible as a distinct pocket within the soil profile. Caliche is a cemented calcium carbonate horizon, not a burrow fill. A mixture cavity and mammillated deposit are not standard terms for this type of trace.