EVANSTON AND HODGES PASS. 149 



formable, though it has about the same dip at this place. The coal- 

 bearing series itself has been provisionally referred to the Wasatch by 

 Dr White,* and those who have studied its fossil flora have agreed in 

 placing it in the upper part of the Laramie. 



A much more satisfactory section of what appears to be the same series, 

 and especially of the underlying beds, may be seen about 50 miles north 

 of Evanston, in the neighborhood of Hams Fork station and Hodges 

 pass, where the Oregon Short Line cuts through the divide between the 

 Green River and Bear River drainage areas. Professor Ward f called 

 attention to it as a plant-bearing locality and suggested its correlation 

 with the Evanston horizon. The lithologic character of the beds, the 

 great thickness of the coal, and the general structure of the region all 

 favor this correlation. The coal series is overlain by reddish conglom- 

 erates, sandstones, and shales like those of the Wasatch near Evanston, 

 and still higher the light-colored Green River shales are well developed 

 and clearly unconformable with all the older beds. The coal-bearing 

 series is here full} T 2,000 feet thick and it rests directly on marine Cre- 

 taceous beds belonging to the Montana formation, of the facies so well 

 developed at Bear River City, Wyoming, and Coalville, Utah ; that is, it 

 has the stratigraphic position of the Laramie, though its upper portion 

 may possibly belong to a later horizon. The prominent Cretaceous sand- 

 stone ridge which is called " Oyster ridge " in the Fortieth Parallel Survey 

 reports is about three miles east of Hodges pass, and may be traced con- 

 tinuously for many miles both north and south. Near its western base, 

 at Diamondville, on the railroad, a coal bed is now mined that is much 

 older than those of Hodges pass, though probably belonging to the Mon- 

 tana formation. The apparent thickness of the strata between the two 

 horizons is about 4,000 feet, in which several bands of Cretaceous fossils 

 were found, including Ostrea coalvlllensis, Meek, and Inoceramus frag ilis, 

 H. and M. (?), immediately above the Diamondville coal; Inoceramus 

 erectus, Meek. Cardium, Cyprimeria, and Anomia from a higher horizon at 

 Hams Fork station, and Inoceramus sp. from the top of the clays at the 

 foot of Hodges pass. On the published geological maps of the region all 

 these beds above the sandstone of Oyster ridge are colored as Wasatch. 



Other Localities. 



carbon, wyoming. 



In discussing the fossil flora of this place the paleobotanists have 

 usually associated it with that of Evanston, though on account of local 



* Bull. U. S. Geol. Survey, no. 34, pp. 9-12. 

 |6th Ann. Rep. U. S. Geol. Survey, p. 541. 



