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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 
sinking stream
Earth science; Geology
A stream that empties into the underground into a cave, usually through a sinkhole.
sima
Earth science; Geology
The oceanic crust, also the lower layer of the continental crust, so called because it is enriched in silica and magnesium oxide. compare sial.
sill
Earth science; Geology
A tabular igneous intrusion that parallels the planar structure of the surrounding rock.
silica tetrahedron
Earth science; Geology
The basic structural unit of which all silicates are composed, consisting of a silicon atom surrounded symmetrically by four oxygen atoms. The structure, therefore, has the form ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)