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Download PDF, EPUB, MOBI Bulletin of the United States Geological Survey Volume 76-79

Bulletin of the United States Geological Survey Volume 76-79 by Geological Survey

Bulletin of the United States Geological Survey Volume 76-79
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Author: Geological Survey
Number of Pages: 202 pages
Published Date: 19 May 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781236264374
File size: 26 Mb
File Name: Bulletin.of.the.United.States.Geological.Survey.Volume.76-79.pdf
Download Link: Bulletin of the United States Geological Survey Volume 76-79
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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. 1891 Excerpt: ...collections which were before obtained. The principal results of that examination, together with other relevant matter, are recorded in this bulletin.8 The formation from which these Texan fossils were collected is the one which, upon the geological map compiled from previously published works by Mr. W. J. McGee,3 as well as the one by Prof. C. H. Hitchcock,4 is represented as Triassic; but, so far as I am aware, it has never beeu claimed by those who have so referred it that any Triassic fossils have been found in it. It is also the same formation that has for a number of years been referred to the Permian by Prof. Cope, who claims that its vertebrate fauna fully warrants such a reference. Although composed of ordinary sedimentary strata it is a copper-bearing formation, certain layers of it having long beeu known to contain considerable quantities ol copper ore in the form of nodules and small xyloid masses. The former are composed of chalcocite, coated with a film of malachite, and the latter of melaconite, combined with which is some chloride of copper.8 A large part of the vertebrate fossils which Prof. Cope has published 'See Giornale di Sci. Nnt. ed Econom., vol. 19, 1888. La Fauna dot Calcari eon Fnsulinn della Vallo del Fiurue Sosio nella Provlneia di Palermo: per Gaetano Giorgio Getnmellaro; pp. 2-106, Tav. A and I-X. After the manuscript of thia bulletin had gone to the printer I received two important publications of a character similar to that of those which have just been referred to, The first is by Mr. A. Karpmsky, concerning certain Carboniferous strata in Knssia. See Ueber die Ammoneeu der Artinskstufe, etc., M6m. l'Acad. Imp. Sol. de St, Petersbourj;, VII serie, tome 37, No. 2. The other is the second publication of Prof. G. G. Gemmelhiro...

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