392 STANTON AND MARTIN — MESOZOIC SECTION ON COOK INLET 



by Dall,* who made some valuable original observations on the stratig- 

 raphy and paleontology at Tuxedni harbor (Snug harbor), Cold bay, 

 Kialagvik bay, and Wood island, near Kodiak. The fossils collected by 

 Doctor Dall were examined by Professor Alpheus Hyatt, who contrib- 

 uted a brief statement concerning them.f 



Professor J. F. Pompeckj J has examined and described some of the 

 Jurassic collections obtained by the Russians more than half a century 

 ago and has briefly discussed the age and correlation of the beds. Dr 

 E. 0. Ulrich § has described the fossils of the Yakutat series, which he 

 referred to the Lias. This formation occurs on Kodiak and adjacent 

 islands and on Yakutat bay, but has not been seen on the mainland of 

 the Alaska peninsula. Mr J. E. Spurr crossed the Alaska peninsula at 

 Naknek lake and Katmai in 1898, and has described || the Mesozoic sec- 

 tion. exposed in that region. 



The junior author visited a few localities on these shores in the summer 

 of 1903, and has described fl part of the Mesozoic stratigraphy, but no 

 connected account of the entire Mesozoic section giving any adequate 

 idea of the thickness and stratigraphic relations of the different forma- 

 tions has been previously published. 



General Geology of the Region 



The most prominent topographic features of this region are three dis- 

 tinct mountain ranges, with two intervening valley regions. These ex- 

 tend roughly parallel in an approximately northeast-southwest direction. 

 The Chigmit mountains are at the northwest and extend from mount 

 Redoubt, near the northern end of Cook inlet, to the southeast corner of 

 Iliamna lake. The Aleutian mountains occup} 7 the axis of the Aleutian 



Paul Fischer: Sur quelques fossiles de 1' Alaska, in voy. a la c6te N. W. de l'Am. 1870-72, par 

 Alphonse Pinart. Paris, 1875, pp. 33-36, pi. A. 



Charles A. White : On a small collection of Mesozoic fossils obtained in Alaska by Mr W. H. 

 Dall. Bull. U. S. Geol. Survey, no. 4, 1884, pp. 10-16, pi. vi. 



M. Neumayr: Die geographische Verbreitung der Jura-formation. Denkschr. der Wiener 

 Akademie, Bd. 50 (1885), pp. 93, 94. 



C A. White: Mesozoic mollusca of the southern coast of the Alaskan peninsula. Hull. U. S. 

 Geol. Survey, no. 51 (1889), pp. 64-70. 



* Report on the coal and lignite of Alaska. Seventeenth Ann. Rept. U. S. Geol. Survey, pt. i, pp. 

 865-869. 



t Report on the Mesozoic fossils : Report on the coal and lignite of Alaska. Appendix iii, Sev- 

 enteenth Ann. Rept. U. S. Geol. Survey, pp. 907-908. 



t Jura-Fossilien aus Alaska. Verhandl. Kais. Russ. Min. Gesellschaft., 2d ser., vol. xxxviii, pp. 

 239-282, pis. v-vii. St. Petersburg, 1900. 



g Harriman Alaskan Expedition, vol. iv, Geology, pp. 125-146. 



|| Reconnaissance in southwest Alaska. Twentieth Ann. Rept. U. S. Geol. Survey, pt. vii. 



It Petroleum fields of Alaska and the Bering River coal fields. Bull. 225, U. S. Geol. Survey, pp. 

 376-381. 



The petroleum fields of the Pacific coast of Alaska, with an account of the Bering River coal 

 deposits. Bull. 250, U. S. Geol. Survey. 



