Bulletin - United States Geological Survey Volume 135-138 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 edition. Excerpt: ...On ancient devitriiied pitchstones and perlites from the Lower Silurian district of Shropshire. Quart. Jour. Geol. Soc, London, Vol. XXXIII, 1877, p. 449. Bayley, W. S. Sphcrulitic volcanics at North Haven, Maine. Hull. Geol. Soc, Am., Vol. VI, 1894, pp. 474-476. Blake, J. F. On the folsites and conglomerates between Bethesda and Llanllyfni, North Wales. Quart. Jour. Geol. Soc, London, Vol. XLIX, 1893, pp. 441-165. Bonney, T. G. On certain rock structures as illustrated by pitchstones and felsites in Arran. Geol. Mag., Vol. IV, 1877, pp. 499-511.. Note on the felsite of Brittadon, North Devonshire. Geol. Mag., Vol. V, 1878, pp. 207-209.. On some nodular fclsites in the Bala group of North Wales. Quart. Jour. Geol. Soc, London, Vol. XXXVIII, 1882, p. 289. Bornemann, T. G. Die Quartzporphyre von Hoiligcnstein mid seine Fluidalstructur. Zeitschr. Deutsch. geol. (iesell., Berlin, Vol. XXXIX, 1887, p. 793. Chapman, F. On a method of producing perlitic and pumaceous structures in Canada balsam. Geol. Mag., Vol. VII, 1880, p. 79. Clements, J. Morgan. The volcanics of the Michiganime District of Michigan. Jour. Geol., Vol. Ill, No. 7, Oct.-Nov., 1895, pp. 801-822. Cole, Grenville A. J. On the artificial production of the perlitic structure. Geol. Mag., Vol. VIII, 1880, p. 115.. On hollow spherulites and their occurrence in ancient British lavas. Quart. Jour. Geol. Soc, Loudon, Vol. XLI, 1885, p. 102.. On the alteration of coarsely sphcrulitic rocks. Quart. Jour. Geol. Soc, London, Vol. XLII, 1886, p. 186.. On the devitrification of cracked and brecciated obsidian. Min. Mag., Vol. IX, No. 44, 1891, pp. 272-274. Cole, Grenville A. J., and Butler, G. W. On lithophyste in the obsidian of the Rocche Rosse, Lipari. Geol. Mag., Vol. IX, 1892, p. 488.. On..