The Russian Carboniferous and Permian compared with those of India and America : a review and discussion / by Charles Schuchert.
- Charles Schuchert
- Date:
- 1906
Licence: In copyright
Credit: The Russian Carboniferous and Permian compared with those of India and America : a review and discussion / by Charles Schuchert. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
3/38 page 29
![Art. VII.—The Russian Carboniferous and Permian com- pared with those of India and America. A Review ayif Discussion / by Charles Schuchert. (With Plate I.) Part I. Part II. Part III. Part IY. Contents: The Work of Tschernyschew. The Work of Noetling. The Work of Diener. The Work of Girty in the Trans-Pecos Region of Texas/ Part I. The Work of Tschernyschew. Die Obercarbonischen Brachiopoclen cles Ural und des Timan. Von Th; Tschernyschew. Mem. du Comity G4ol., vol. xvi, 1902 [1903J, pp. i-viii, 1-749, and 63 plates. This large and exceedingly valuable monograph describes the brachiopods collected by the author and others during eight years in the Ural and two years in the Timan districts of European Russia. The great number of 213 species are de- scribed, and two new genera—Keyserlingina and Spiriferella. In the present review of this monograph, the author’s gen- eral conclusions regarding the occurrence of these forms in the various horizons and their significance in correlation only will be taken into account. In fact, Tschernyschew’s correla- tions are of the first importance, and will be fully presented here. In the introduction the author states : — “ It is my opinion that the exceptional richness of the fauna of the Upper Paleozoic sediments of Russia and the positive succession of the various horizons give us the right to regard eastern and northern [ European ] Russia as the starting point for the correlation of similar deposits in other countries. . . . Not infrequently my views differ from those of my colleagues in western Europe and America, and in recording these con- clusions in the final chapter of my work my chief object has been to present the views of one geologist who in the course of many years has studied the upper Paleozoic deposits in the vast territory of Russia. It is very probable that some of my freely-stated assertions will be strongly criticized by geologists both at home and in foreign countries, and I shall be the first to greet such criticisms with pleasure” (pp. vi, vii). Of the 213 species of brachiopods known in the “Upper Carboniferous ” of Russia, 61 pass into the Artinsk zone and but 10 into the typical Permian. The latter are Dielasma elongatum, Rhynchopora nikitini, R. variabilis, Ccomaro- phoria crumena, C'.superstes, C. globidina, Atliyrispectinifera, A. roissyi, Spiriferina cristata, and Productus aff. leplayi.](https://iiif.wellcomecollection.org/image/b22407194_0005.jp2/full/800%2C/0/default.jpg)
