Natural environment

Natural environment

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

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Natural environment > Speleology

lava cave

Natural environment; Speleology

A cave that formed in a partly cooled, broadly basaltic or phonolitic lava, not by erosion but by molten material flowing away. In most cases, an initial active lava conduit is ...

lava tube

Natural environment; Speleology

A cave that formed in a partly cooled, broadly basaltic or phonolitic lava, not by erosion but by molten material flowing away. In most cases, an initial active lava conduit is ...

marl

Natural environment; Speleology

Unconsolidated sedimentary rock consisting largely of calcium carbonate and clay; usage varies from calcareous clay to earthy limestone, and in some parts of the United States, ...

marble

Natural environment; Speleology

Metamorphosed and recrystallized carbonate rock that is generally capable of supporting cave development.

meander

Natural environment; Speleology

Overdeveloped and selfexaggerated bend is a stream course either on the surface or underground, caused by more erosion on the outside than on the inside of a bend due to natural ...