Geological description and occurrences of some rocks:
GRANITE
GRANITE
- It is a plutonic, light coloured igneous rock
- It is the most common rock
- Two essential mineral constituents of granite are quartz and feldspar
- Mica and hornblende are also found in granite
- Granites are generally coursed to medium grained holo-crystalline and equi-granular rocks
- Types of granites are distinguished on the basis of relative abundance of some particular accessory mineral in them.
- Granite is the most widely distributed igneous rock in the crust of the earth.
- They occur chiefly as deep-seated intrusive bodies like sills, boses, stocks and phacoliths
- Granites find extensive use in architectural and massive construction where they are found in abundance.
- These rocks have been used extensively in monuments and memorials, as columns and steps and as flooring in buildings.
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