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Natural environment
Related to any physical feature of the earth's natural environment.
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Natural environment > Speleology 
self belay
Natural environment; Speleology
In mountaineering, a climber can employ a self-belay with an ice axe to prevent a slide down a snow-covered slope. To use an ice axe to self-belay, a climber will hold the axe by ...
paleokarst
Natural environment; Speleology
A karstified rock or area that has been buried by later sediments; in some places, ancient caves have been completely filled by the later sediments.
column
Natural environment; Speleology
A flowstone formation, generally cylindrical, formed by the union of a stalactite and stalagmite.
figure eight loop
Natural environment; Speleology
A type of knot created by a loop on the bight. It is used in climbing and caving where rope strains are light to moderate and for decorative purposes.
anastomosis
Natural environment; Speleology
The development of a network of branching, intersecting, and rejoining channels in a two dimensional system. Anastomosing tubes, or cave anastomoses, which are generally formed ...
helmet
Natural environment; Speleology
A miner's, climber's or other kind of non-metallic, protective helmet used in caving.
chasm
Natural environment; Speleology
A deep, fairly narrow breach in the earth’s surface; an abyss; a gorge; a deep canyon.
Sub-categories
- Air (43)
- Atmosphere (59)
- Climate (1147)
- Climate change (10457)
- Coral reefs (23903)
- Deserts (738)
- Earthquake (7143)
- Flood (34)
- Forests (37)
- Grassland (35)
- Land mass (144)
- Landslide (66)
- Mountains (203)
- Plateau (39)
- Speleology (1857)
- Volcano (5852)
- Water (18527)