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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

wave base

Earth science; Geology

A depth equal to one half the wave length of waves in deep water, below which stirring due to wind is negligible.

waterfall

Earth science; Geology

The perpendicular or very steep descent of a stream.

water power

Earth science; Geology

Power generated through the agency of moving water.

water gap

Earth science; Geology

A gap in a ridge or mountain through which a stream flows.

vulnerable mineral

Earth science; Geology

A mineral that does not easily resist decomposition.

volcanogenic massive sulfide deposit

Earth science; Geology

A mineral deposit of metallic sulfides formed directly through processes associated with volcanism, commonly in a submarine setting.

volcanic cinder

Earth science; Geology

A pyroclastic fragment, 0.5 to 2.5 cm in diameter, formed as magma spatters into the air during a volcanic eruption and cools as it falls to Earth.