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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 
habit
Earth science; Geology
A general term for the outward appearance of a mineral, defined by the relative sizes and arrangement of characteristic crystal faces.
half-life
Earth science; Geology
The amount of time that it takes for one half of an original population of atoms of a radioactive isotope to decay.
hanging valley
Earth science; Geology
A valley whose mouth is high above the floor of the main valley to which it is tributary. Usually, but not always, the result of mountain glaciation.
hanging wall block
Earth science; Geology
The body of rock that lies above an inclined fault plane. compare foot wall block.
hiatus
Earth science; Geology
A gap or interruption in the continuity of the geologic record either because the record was never formed or because it was destroyed by erosion. It represents the time interval ...
high level nuclear waste
Earth science; Geology
Radioactive waste from defense activities of the U. S. government and from spent fuel rods from nuclear reactors.
hinge fault
Earth science; Geology
A fault along which there is increasing offset or separation along the strike of the fault plane, from an initial point of no separation.
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)