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Geology
The science that comprises the study of the solid Earth and the processes by which it is shaped and changed.
Industry: Earth science
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Geology
Migmatite
Earth science; Geology
"Mixed rock". A metamorphic rock that forms in one of two ways. The metamorphic rock may be heated enough to partially melt, but not completely. The molten minerals resolidify within the metamorphic ...
Mica
Earth science; Geology
Group of silicate minerals composed of varying amounts of aluminum, potassium, magnesium, iron and water. All micas form flat, plate-like crystals. Crystals cleave into smooth flakes. Biotite is ...
Lithosphere
Earth science; Geology
The outer layer of solid rock that includes the crust and uppermost mantle. This layer, up to 100 kilometres (60 miles) thick, forms the Earth's tectonic plates. Tectonic plates float above the more ...
Melange
Earth science; Geology
Mixture of rocks formed by tectonic disruption, such as multiple faulting, which brings disparate rock types together. Usually consists of a matrix of weak material, like shale, with hard pieces of ...
Lithification
Earth science; Geology
The conversion of loose sediment into solid sedimentary rock. Several processes, including compaction of grains, filling of spaces between grains with mineral cement, and crystallisation act to ...
Metamorphic rock
Earth science; Geology
A rock that has undergone chemical or structural changes produced by increase in heat or pressure, or by replacement of elements by hot, chemically active fluids.
Limonite
Earth science; Geology
A mineral composed of iron oxides and water. Rust. Very common in many rocks after weathering at the Earth's surface. Imparts brown or yellow colours to many rocks.
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