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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 
ripples
Earth science; Geology
Formations in fine-grained sediment caused by the movement of water or wind over a depositional surface. They can be asymmetrical indicating flow direction, or they can be fairly ...
rock forming minerals
Earth science; Geology
Said of those minerals than enter into the composition of rocks, and determine their classification. The more important rock forming minerals include quartz, feldspars, micas, ...
Roche limit
Earth science; Geology
The Roche limit was first described by Edouard Roche in 1848. The Roche limit is the closest distance an object can come to another object without being pulled apart by tidal ...
sand sea
Earth science; Geology
A large area completely, or nearly completely, covered with sand dunes.
sapping
Earth science; Geology
Spring fed channels that are created when soft sediment layers are removed by underlying water erosion.
scarp
Earth science; Geology
A cliff or steep slope of some extent that may form a marked topographic boundary.
schiaparelli
Earth science; Geology
Giovanni Virginio Schiaparelli (1835-1910). Italian astronomer at the Milan Observatory who reported markings on Mars which he called "canali".
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)