Natural environment

Natural environment

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

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Natural environment > Speleology

aragonite

Natural environment; Speleology

A relatively rare form of calcium carbonate (CaCO3), chemically identical to the more common calcite but of orthorhombic crystal form. Its pure form is metastable in the cave ...

mineral

Natural environment; Speleology

Mineral components of a rock, often in macrocrystalline form.

dry valley

Natural environment; Speleology

Valley that lacks a permanent surface stream. Dry valleys are common on carbonate rocks with good primary permeability and occur on other permeable rocks such as sandstone. Dry ...

through cave

Natural environment; Speleology

Cave through which a stream runs from entrance to exit or formerly did so.

limestone

Natural environment; Speleology

Sedimentary rock containing at least 50% calcium carbonate by weight. The purer limestones consist almost entirely of calcite; less pure rocks may be referred to as, for example, ...

bolt

Natural environment; Speleology

A high tensile steel bolt used as an anchor; either a conical bolt screwed into a metal holder in a hole drilled in rock, causing expansion for grip, or a bolt with partially ...