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The amount of Argon sublimation that occurs is a function of the purity of the sample, the composition of the mother material, and a number of other factors.

These factors introduce error limits on the upper and lower bounds of dating, so that final determination of age is reliant on the environmental factors during formation, melting, and exposure to decreased pressure and/or open-air.

Geology also plays a role in geotechnical engineering and is a major academic discipline.

The majority of research in geology is associated with the study of rock, as rock provides the primary record of the majority of the geologic history of the Earth.

Geology can also refer generally to the study of the solid features of any terrestrial planet (such as the geology of the Moon or Mars).It is most useful for rocks which have been exposed for between 10 years and 30,000,000 years.The most common of these dating techniques is Cosmogenic radionuclide dating.Thus, a granite containing all three minerals will record three different "ages" of emplacement as it cools down through these closure temperatures.Thus, although a crystallization age is not recorded, the information is still useful in constructing the thermal history of the rock.




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