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 248
FiG. i.-YoUK .\.\]l IKAGilliuTruM UL:A1:UY, CAMBltlA. … Ilu. -J. XuXlii A\U rKACllHUTTOM QUARRY. CAMBRIA. MAKYLA.ND GEOLOGICAL SURVEY 227 brown-red decomposition product, the decay penetrating irregidarlylike the processes of oxidation into a piece of metal. The first physicalindication of decay is shown by a softening of the slate, so that itmay be…
Stone · Building stones
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