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Earth science
Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.
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Earth science > Geology 
durable crust
Earth science; Geology
An outer rind or crust formed on a rock. Durable crusts form when rock chemically reacts with water and possibly atmospheric dust, producing a hard outer surface that resists ...
earthquake
Earth science; Geology
A sudden ground motion or vibration of the Earth. Produced by a rapid release of stored-up energy along an active fault.
ejecta
Earth science; Geology
Material that is thrown out by a volcano, including pyroclastic material (tephra) and, from some volcanoes, lava bombs.
eocene
Earth science; Geology
An epoch of the Tertiary period, spanning the time between 54.8 and 33.7 million years ago.
eolian
Earth science; Geology
Term describing the process of wind erosion, transport, and deposition, and wind-created deposits and structures such as sand dunes.
eon
Earth science; Geology
The primary division of geologic time which are, from oldest to youngest, the Hadean, Archean, Proterozoic, and Phanerozoic eons.
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)