Natural environment

Natural environment

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

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Natural environment > Speleology

rappel rack

Natural environment; Speleology

A long U-shaped steel bar that holds several brake bars and is used for rappelling.

vertical caving

Natural environment; Speleology

Caving that includes a lot of ascending and descending.

vertical cave

Natural environment; Speleology

A vertical passage within a cave system, formed along joints by which underground watercourses are transferred from a higher to a lower bedding plane. They may become transformed ...

abseil

Natural environment; Speleology

A controlled descent of a rope using friction obtained by either wrapping the rope around the body in a particular way or passing the rope through a carabiner or passing the rope ...

rappel

Natural environment; Speleology

The art of descending a rope using some sort of friction between the rope and the rappeller to control the rate of descent. Synonym: abseil.

fossil

Natural environment; Speleology

Any remains or traces of animals or plants that lived in the prehistoric past, whether bone, cast, track, imprint, pollen, or any other evidence of their existence.

calcium carbonate

Natural environment; Speleology

Naturally occurring compound with the chemical formula CaCO3. It occurs commonly as the mineral calcite and less commonly as aragonite, and is the major component of carbonate ...