The building and decorative stones of Maryland, containing an account of their properties and distribution (1898)
Merrill, George P. (George Perkins), 1854-1929, Mathews, Edward Bennett, b. 1869 · Baltimore, Johns Hopkins press · leaf 144
aces between the different boulders being filledwith incoherent granitic sand, derived from the decomposed edgesand the sides of the blocks. It is quite evident that the granitic masswas originally everywhere jointed, and that atmospheric decay tookplace much faster on the edges and corners than on… … ni:rAii.i:u \ ii:w. WKi.i.Kirs urAiniY. c.ii.wni:. iMARVI.AXD nKOLOGICAI. SDEVEY 155 usually from 5 to 10 inches in tliickness. The interior of the bouldersis perfectly fresh, and affords the best of rock for building purposes.As decomposition progresses the amount of interstratified sand…
Stone · Building stones
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