540 GEOLOGICAL SURVEY OF THE TERRITORIES. 



Feet. 



33. Light-colored sandy shales, perhaps some sandstone.." 45 



34. Light-gray or whitish sandstone 14 



35. Dark and light-colored sandy shales 60 



36. Dark grayish-brown sandstone 20 



37. Dark-grayisli shale with some carbonaceous layers and perhaps 



some thin seams of coal near base 100 



38. Hard reddish sandstone 5 



39. Soft argillaceous sandstone, some harder layers 20 



40. Coal 4J 



41. Dark clay 4" 



42. Hard, impure coal — " rock coal". 2 



43. Coal 9^ 



44. Hard, impure coal — " rock coal " 4| 



45. Coal - 10 



46. Shale and clay 10 



47. Coal 5i 



48. Shaly clay, about 20"^ 



49. Iron ore, (ferruginous sandstone) 3 



50. Clay 15 



51. Coal 1 



Still above the highest member of this section, we could see from 500 

 to 700 feet of sandstones and sandy clays or shales, which we did not 

 examine closely. In fact, the whole of the upper part of the section is 

 onlj' valuable to give an idea of the alternations and the general char- 

 acter of the whole series. The sandstones afforded in no instance any 

 trace of animal or vegetable remains, and the exposures of the softer 

 beds were such as to give no evidences of any fossil contents, being 

 generally slopes more or less covered with debris. The dip was through- 

 out nearly northeast, varying perhaps a little to the eastward; its angle 

 averaged from 17"^ to 20°. 



The first fossils found in place were seen in No. 32, which contained 

 impressions of large leaves of dicotyledonous trees. About this hor- 

 izon also we picked up a fragment of sandstone containiug the cast 

 of a Helix, which however might, judging from its appearance, have 

 come from bed No. 30. Farther down bed No. 34 also contained leaf- 

 impressions, and in No. 35 we found imperfect casts of bivalve shells 

 resembling Unio. In No. 37, below its middle, we found a two-foot band 

 exposed in a prospecting trench, almost entirely made up of small fresh- 

 water-shells, Ct/clas, P/tysa, &c., all crushed together and almost unrecog- 

 nizable, except as to genus. 



Nos. 42 to 45 inclusive comprise the 26-foot seam worked at this 

 point. The beds below were not seen by us, that portion of the section 

 having been furnished by Mr. Deuel, superintendent at the mines of 

 the Rocky Mountain Coal and Iron Company at this point. 



We also visited the hills on the north side of Bear Eiver, northeast 

 of Evanston, which we found to be composed of very similar strata to 

 those in the upper part of the Almy section, viz, alternations of coarse 

 sandstones, conglomerates, and sandy clays. There seems to have been 

 a considerable disturbance here besides the mere tilting of the beds, 

 and from the altered direction of the strike, which is here nearly north 

 and south, we were led to suspect a considerable lateral displacement 

 with faulting, which might very possibly cause the appearance of the 

 same beds in both these hills, and those about Almy, although at first 

 sight these would appear much higher in geological position. We did 

 not attempt, however, to work out tl)e geological structure to any great 



