4 Terms
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Geology
The science that comprises the study of the solid Earth and the processes by which it is shaped and changed.
Industry: Earth science
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Geology
Magnetite
Earth science; Geology
Iron oxide mineral (Fe3O4). Usually tiny black, metallic crystals. Magnetite will attract a magnet and sometimes, in a rock, a hiker's compass needle.
Grain size
Earth science; Geology
Refers to the size of individual mineral crystals or particles within a rock or sediment deposit.
Biotite
Earth science; Geology
A common rock-forming mineral of the mica family. Biotite is a black or dark brown silicate rich in iron, magnesium, potassium, aluminum, and, of course, silica. Like other micas, it forms flat ...
Avalanche
Earth science; Geology
Masses of rock or ice that fall or slide suddenly under the force of gravity.
Cave
Earth science; Geology
A natural open space underground, large enough for a person to enter. Most commonly occur by the dissolution of soluble rocks, generally limestone.
