CHAPTER XYIf. 
THE ARCTIC URAL AND THE TIMAN RANGE. 
(MAP, PL. VI., AND COLOURED SECTIONS, PL. V.) 
Easte ™ Plank °f the Ural from 62° to 65° North Latitude .—Jurassic Deposits in 
65° North Latitude.— Western Flank of the Arctic Ural.— Section of the River 
Iletsk, with fossiliferous Lower as well as Upper Silurian Rocks.— Carboniferous 
Limestone and peculiar Development of its overlying Whetstones.— Isolated Trappeean 
Ridge of SabUu.—The Tinian Range— Constitutes the North-eastern limit of the 
Gi eat Pei mian Basin Its Granite and Schists. — Upper Silurian Rocks with Pen- 
tameri. The Domanik Schists shown to he of Upper Silurian age. — Devonian 
Rocks of the same type as in the Valdai Hills.— Carboniferous Limestone like that 
of Russia in Europe.— Eruptive Rocks of the Timan Range.— Large area between 
the Timan and the Ural occupied by Jurassic deposits.— Conclusions, and Results of 
the Survey of the Petcliora. 
Quitting for a time the colonized portions of these mountains, let us now 
extend our view to wilder regions, which, as distinguished from the North Ural of 
the miners, may be termed the “ Arctic Ural.” 
Eastern Flank of the Ural Chain Mountains, extending from Bogoslofsk by Petro- 
pavlosk to 65° North Latitude . — Our own researches between Ekaterinburg and 
Bogoslofsk having completely satisfied us concerning the true nature of the eastern 
flank of the Ural, a reference to an excellent geological map of these environs, 
prepared by Captain Karpinski, sufficed to convince us, that the same limestones 
and igneous rocks extended to Petropavlosk and its environs, the most northern 
establishment of the Russian mines. It was not, therefore, necessary to follow 
these deposits further northwards upon their line of bearing ; for we had before us 
all the fossils and specimens of Petropavlosk, and from them we clearly perceived 
that the limestone nearest to the Ural ridge contained Silurian Pentameri whilst 
Devonian shells occurred upon the east. On the banks of the Sosva, as upon 
