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10-Aug-2017 23:51

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Geology describes the structure of the Earth beneath its surface, and the processes that have shaped that structure.

All three types may melt again, and when this happens, new magma is formed, from which an igneous rock may once more crystallize.) is an earth science concerned with the solid Earth, the rocks of which it is composed, and the processes by which they change over time.Geology can also refer to the study of the solid features of any terrestrial planet or natural satellite, (such as Mars or the Moon).Geology, a major academic discipline, also plays a role in geotechnical engineering.