Aggregate (geology)

In the Earth sciences, aggregrate has three possible meanings.

In mineralogy and petrology, an aggregate is a mass of mineral crystals, mineraloid particles or rock particles. Examples are dolomite rock, which is an aggregate of crystals of the mineral dolomite, and rock gypsum, an aggregate of crystals of the mineral gypsum.Lapis lazuli is a type of rock composed of an aggregate of crystals of many minerals including lazurite, pyrite, phlogopite, calcite, potassium feldspar, wollastonite and some sodalite group minerals.

In mining geology, an aggregate (often referred to as a construction aggregate) is sand, gravel or crushed rock that is has been mined for use as a building material in the construction industry.

In pedology, an aggregate is a mass of soil particles. If the aggregate has formed naturally, it can be called a ped; if formed artificially, it can be called a clod.

Aggregates are used extensively in the construction industry. Often in making concrete, a construction aggregate is used.

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