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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 
outflow channels
Earth science; Geology
Structures on Mars that are more than 200 kilometers wide and can stretch for 2,000 kilometers or more. These channels emanate from what is called chaotic terrain, regions of ...
outwash
Earth science; Geology
Sand and gravel deposited by meltwater streams in front of the end moraine to the margin of an active glacier.
ovda regio
Earth science; Geology
The tectonic fabric of this region on Venus trends predominantly east-west. The large radar-dark areas are probably tectonically formed basins that have been filled in by fluid ...
oxides
Earth science; Geology
A mineral compound characterized by the linking of oxygen with one or more metallic elements, such as Cuprite, Cu 2 O.
paleozoic
Earth science; Geology
An era of geologic time, from the end of the Precambrian to the beginning of the Mesozoic Era, or from about 570 mya to about 225 mya.
patterned ground
Earth science; Geology
A group term for the more or less symmetrical forms such as circles, polygons, nets, steps, and stripes that are characteristic of, but not necessarily confined to, surficial ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)