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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 
dactyl
Earth science; Geology
A small asteroid which measures 1.6 x 1.4 x 1.2 km and orbits a larger asteroid, Ida. Dactyl is the first evidence that asteroids may have tiny moons.
deflation basins
Earth science; Geology
A topographic basin resulting from the removal of material from a beach, desert or other land surface by wind action.
deimos
Earth science; Geology
The irregularly shaped, dark colored moon of Mars. Deimos is smaller than its companion moon, Phobos. Both orbit very close to Mars, have short periods of revolution (1.3 days for ...
dendritic river systems
Earth science; Geology
Networks of interconnecting dry river beds that exhibited dendritic (from the Greek, meaning "treelike") drainage patterns characteristic of water-carved channels.
deposit
Earth science; Geology
Material of any kind that has accumulated through the activities of water, wind ice or other agents.
desert pavement
Earth science; Geology
A lag accumulation of pebbles or boulders that cuts off further deflation.
Devana Chasma
Earth science; Geology
A north-south trough located in the Beta Regiones highland regions in the equatorial zone of Venus.
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)