JURASSIC FOSSILS. 163 



One hundred and thirty-five feet above the same datum there is another 

 horizon, distinguished in the northern part of the Hills by its numerous 

 fossils, and in the following section, made by Mr. Patrick, one or two miles 

 west of the last section and immediately north of the forks of the Red- 

 water, its position in relation to the underlying strata is well shown: 



Jura. 



Feet. 

 6. Sandstone, white ; summit of the hill . 60 



5. Sandstone, pinkish white ... 25 



4. Sandstone, yellow and white, interstratifled with sandy shales ; a layer near 



the top 1J inches thick (135 feet above the Eed Beds) was found to be 



highly fossiliferous 25 



3. Sandstone, white, but reddish in places 50 



2. Clay, or clay shales, greenish 60 



Bed Beds. 



1. Gypsum and red clays to valley — 



The same horizon (4) was found to carry many fossils in the exposures 

 near Crow Peak. 



The following section was observed by Mr. Jenney in a butte which 

 stands in the Red Valley two or three miles south of the forks of the Red- 

 water : 



Jura. 



Feet. 



6. Sandstone, massive, ot a yellowish brown color 5 



5. Shales or clays, argillaceous and silicious 30 



4._ Conglomerate ; pebbles cemented by lime ; containing a few fragments of 



molluscan fossils 3 



3. Shales, soft and sandy, with some fossils 2 



2. Clay, gray 20 



Bed Beds. 

 1. Eed clays — 



Southwest of Sun Dance Hills and west of Inyan Kara there is an 

 inclining plateau cut into parallel ridges which run northwest and south- 

 east, parallel with the course of Inyan Kara Creek. These were not 

 examined critically, but manv of them are capped with the Cretaceous 

 sandstone, below which are the Jurassic strata, while others consist almost 

 entirely of the Jurassic. They are a direct continuation of the foothills on 

 the Beaver, but here, owing to the low angle of dip, they spread out and 



