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 16
a stretching process, per-haps even to the point of fracturing, while those in the lower portionwill bo con-espondingly squeezed and enih^lud as shown in tli,. figure.Between these two extremes will be a zone practically unaffw^ted,and known to geologists as the zone of no strain. Now it is… … Folded rocks (:iftcr \au Rise). it may be good, but if only the superficial beds {D) or the very lowest{E) are accessible, the materials may be all so seriously shattered asto be full of joints, dry seams and other defects, so as to renderthe production of blocks of large size an impossibility.…
Stone · Building stones
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