Natural environment

Natural environment

Related to any physical feature of the earth's natural environment.

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Natural environment > Speleology

jumar

Natural environment; Speleology

An ascender with a simple finger-operated safety catch, a handle and several attachment points.

cave fill

Natural environment; Speleology

Insoluble deposits of clay, silt, sand, or gravel flooring or filling a cave passage. In a more restricted sense, cave earth includes only the finer fractions: clay, silt, and ...

rock shelter

Natural environment; Speleology

Shallow cave under an overhanging rock ledge. Many sea caves are rock shelters. Also found in limestone and other rock types where streams have undercut their banks at bends, or ...

natural bridge

Natural environment; Speleology

A residual portion of the roof of a subterranean stream which has not collapsed and is found bridging a valley. Normally a surface feature, but may be used to describe a similar ...