Publisher's Synopsis
Excerpt from A Dictionary of Applied Chemistry, Vol. 3 of 5
It is not uncommon to find in granite nod ular masses which appear as dark patches on the fractured or polished surface of the rock. Whilst some of these inclusions seem to be fragments of foreign rock which have been caught up in the granitic magma and altered, others may be regarded as parts of the original magma differentiated during consolidation and it is notable that the inclusions are usually more basic than the matrix. (for comparative analyses of the granite and its inclusions, v. J. A. Phillips in Quart. J ourn. Geol. Soc. 1880, 36, Granite is extensively employed for construo tive purposes where massive work is required, as in the foundations Of buildings, in docks, sea walls, the piers of bridges, and lighthouses. The specific gravity of granite is about 26; a cubic foot weighing about 166 lbs and a cubic yard 2 tons.
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