The drift-clays are the result of the grinding up of graniticrocks.
2
A gramen of Switzerland grows on the graniticrocks of the straits of Magellan.
3
The graniticrocks included granite, gneisses, syenites and norite.
4
Such crystals occur either in cavities in mineral-veins and in graniticrocks, or as a lining in agate geodes.
5
Plants disappeared; the graniticrocks lost all trace of solidity; the liquid state was suddenly substituted for that which had before existed.
6
These enormous stony masses appear sometimes in rhombs, sometimes under those hemispheric forms, peculiar to graniticrocks when they separate in blocks.
7
Much fine amethyst comes from Russia, especially from near Mursinka in the Ekaterinburg district, where it occurs in drusy cavities in graniticrocks.