Records of the Geological Survey of India, Volume 69

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Includes the "Annual report of the Geological Survey of India," 1867-

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Page 380 - Physical properties of the principal commercial limestones used for building construction in the United States : US Bur.
Page 180 - Sahni, B., and Singh, TCN (1926). On some specimens of Dadoxylon arberi Sew. from New South Wales and Queensland.
Page 406 - Under tropical conditions, acidic rocks such as aplites, pegmatites or granites and granitic gneisses, do not undergo primary lateritization but gradually change through katamorphism into pipe or pot-clays, or more or less quartziferous and impure kaolins. (!') Under tropical conditions, lateritic earths and even pot-clays may undergo desilication, with the formation of concretionary and surficial masses of bauxite. (g) Under temperate conditions, the katamorphism of basic rocks is not a lateritic...
Page 113 - X«ira + aXj ) is proposed for the era of unknown marine sedimentation between the adjustment of pelagic life to littoral conditions and the appearance of the Lower Cambrian fauna.
Page 119 - JA 1927. Brachiopod morphology and genera (Recent and Tertiary). New Zealand Board of Science and Art, Manual No.
Page 406 - Under tropical conditions, the katamorphism of basic and intermediate rocks, at or close to the water-table, under conditions of more or less perfect drainage, is accompanied by the almost complete removal of silica, and of calcium, magnesium, potassium and sodium oxides, leaving an earthy...
Page 234 - ... whole course of it are to be found springs of water, cropping up here and there. Both from the presence of water and from its forming a short cut across mountain spurs, this crack is largely used as a thoroughfare. We found that the old greybeards of the tribes residing in the neighborhood all knew of its existence. They told us that during their lifetime, on some three occasions after severe earthquake shocks, deep fissures had appeared along this line, and that they had similar accounts handed...
Page 180 - Sahni, B. (1933). Dadoxylon zalesskyi, a new species of Cordaitean trees from the Lower Gondwanas of India. Rec. Geol. Surv. India, 66 (4), 44-429.
Page 421 - ... who heated amorphous silica with water to 200° in a sealed tube. In two days the silica had caked together to a granular mass of glass. The quartz crystals which line cavities in chalcedony or wood opal may have been formed by the action of alkaline silicates upon the last-named mineral. Much has been written upon the solubility of quartz, and the corrosion of quartz pebbles, pre• See J.
Page 201 - Preliminary geological report on the Baluchistan (Quetta) earthquake of May 31st, 1935.

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