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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 
magnetite
Earth science; Geology
Iron oxide mineral (Fe3O4). Usually tiny black, metallic crystals. Magnetite will attract a magnet and sometimes, in a rock, a hiker's compass needle.
carbonic acid
Earth science; Geology
A mild acid formed when water and carbon dioxide chemically combine in the atmosphere and soil.This acid is a very important component in the development of cave decorations ...
calcareous
Earth science; Geology
A descriptive term used for rocks and other earth materials that have an abundance of calcium carbonate (CaCO3). For example, a calcareous sandstone has up to 50% calcium ...
lichenometry
Earth science; Geology
A dating method that uses the growth rate of certain lichen species as an indicator of the age of the surface the lichen is growing on.
Gondwana
Earth science; Geology
A continent formed in the Southern Hemisphere during the Late Paleozoic. It included most of South America, Africa, India, Austrailia, and Antarctica.
shale
Earth science; Geology
A sedimentary rock that is made of hardened clay, silt, or mud. Shale has many layers and splits easily into slabs.
spreading ridge
Earth science; Geology
An area where two of the Earth's plates are moving away from each other is called as spreading ridge.
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)