Earth science

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

amphibole

Earth science; Geology

A family of silicate minerals forming prism or needlelike crystals. Amphibole minerals generally contain iron, magnesium, calcium and aluminum in varying amounts, along with ...

amphibolite

Earth science; Geology

A rock made up mostly amphibole and plagioclase feldspar. Although the name amphibolite usually refers to a type of metamorphic rock, an igneous rock composed dominantly of ...

andesite

Earth science; Geology

A fine-grained volcanic rock of intermediate composition, consisting largely of plagioclase and one or more mafic minerals.

anhydrous

Earth science; Geology

Literally, "without water". Refers to minerals or other materials which do not have water as an primary constituent.

anticline

Earth science; Geology

A fold that is convex upward, or that had such an attitude at some stage of its development. compare syncline

annual snowline

Earth science; Geology

A term used by glaciologists (scientists who study glaciers) for the boundary where the amount of snow loss from melting equals the amount of snow accumulation from snowfall (also ...