Forms of Igneous Rocks
Granites occur exclusively as intrusive bodies and may occur in almost any forms. Intrusive igneous bodies are found in two forms, concordant and discordant. Concordant bodies cooled along the planes of weakness like bedding plane, foliation etc. of the country
rock, while the discordant bodies cut across the structure of pre-existing
rocks.
After knowing the form of granitic body quarrymen can take advantage of it, as in what direction he has to extend mining and up to what depth the same body will continue. So this knowledge plays an important role in quarrying granites. Important granitic forms are shown in fig-1. Batholiths are the greatest bodies of igneous intrusions. According to Prof. Daly batholiths are located in mountain making zones and are elongated, parallel to the tectonic axes of the folded belts. If the surface area of batholith is less than 100 sq.km the intrusion is termed as 'Stock' and the term 'Boss' is applied to those stocks in which the outcrop is approximately circular (fig-1).

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