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Natural environment
Related to any physical feature of the earth's natural environment.
17Categories 71833Terms
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Natural environment > Volcano 
lava tube
Natural environment; Volcano
A tunnel formed when the surface of a lava flow cools and solidifies while the still-molten interior flows through and drains away.
limu o pele
Natural environment; Volcano
Delicate, translucent sheets of spatter filled with tiny glass bubbles.
lithosphere
Natural environment; Volcano
The rigid crust and uppermost mantle of the earth. Thickness is on the order of 60 miles (100 km). Stronger than the underlying asthenosphere.
maar
Natural environment; Volcano
A volcanic crater that is produced by an explosion in an area of low relief, is generally more or less circular, and often contains a lake, pond, or marsh.
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)