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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ... but it is very probable that experimentation will show that by mixing the interbedded shales with them the required composition will be attained. Analysis of compact, black, argillaceous limestone, Chambersburg formation, Riverton, Va. (J. H. Gibboney, Analyst.) Per cent. Insoluble 15.88 Alumina (A1,0.) 1 0 92 Iron oxide (FejO,) j Lime (CaO) 4(5.34 Calcium carbonate (CaCO,) 82.75 Magnesia (MgO) 0.21 Magnesium carbonate (MgCO,) 0.44 Total 99.99 PAGE COUNTY. Practically the same conditions of cement rock occurrence as that just described for Warren county hold for Page county, the line of outcrop cutting across the various meanderings of the South Fork of the Shenandoah river and following approximately a northeast-southwest direction. In addition to the fact that the argillaceous and pure limestones are usually covered by recent deposits, the transportation facilities in Page county are some distance from this line. An argillaceous limestone outcropping on the extreme northern edge of Page county along the line mentioned gave the following very favorable composition: Analysis of argillaceous (Chambersburg) limestone 5 miles east of Woodstock, Va. (Wirt Tassin, Analyst.) Per cent. Silica (SiO,) 16.34 Alumina (A1,0.) ) 7.„ Iron oxide (Fe2O,) ) Calcium carbonate (CaCO,) 74. 14 Magnesium carbonate (MgCO,) 1.00 Water (H,0) 2.00 Total 100.97 The dolomitic limestones of Page county received considerable attention from Professor Rogers, as is evident from the following table of analyses quoted from the "Geology of the Virginias": Analyses of dolomitic limestones, Page county, Virginia. I. Dingy blue limestone of firm texture, from vicinity of Luray, Virginia. II. Light brown compact limestone, south side of Shenandoah river, 2 miles from Blackford's...