74 



WESTER:Nr 



Three 



1 xv: 



XIX 



Fossil, 



obtained from 



mation 



curios. On the side of the river opposite Fish Cut the Green River 

 shale has been eroded into a variety of picturesque forms, such as are 



XVII, B, and X\ 



ma} 



'o 



om 



On the okl grade just below the present road in Fish Cut there are 

 several oil seeps, where the surface is kept moist by oil that oozes from 

 the shale. Little oil occurs in the Green River formation. Its car- 



m 



3 XIX, 1 

 ammonia 



from 



the presence of oil yielded, on distillation, 31 gallons of oil to the ton 

 and an amount of ammonia equivalent to 34 pounds of ammonium 

 sulphate, a product that is nearly as valuable as the oil. 



occur 



ained 



occurs in such a way as to suggest that it fills old river channels. It 

 is this channel sandstone that caps the curious pinnacles which are so 

 conspicuous near Green River. The softer shale surrounding and 

 underlying the masses of hard sandstone softens and crumbles nnder 

 the influence of the weather and is washed by the rain or blown by the 

 \vind from the bluffs, the portions that are protected by the hard cap- 

 ping standing as isolated monuments or precipitous cliffs. 



From Peru station the traveler may catch glimpses toward the 



high peaks of the Uint 



Peru. 



r 



Elevation 6,3S1 feet. 

 Omaha 831 miles. 



Colorado. These appear more conspicuous from 

 points farther west. 



From Green River the road rises by a relatively 



steep grade over strata that dip shghtly to the west, 



the younger Eocene or Bridger beds » occupy the sur- 



and at Peru 



face. Where they are cut b 

 brown shalj or limj 





the raih-oad these beds consist of 



jreat numbers of fossil bones, most of them 

 unspecialized types of mammals, havf^ ho 



from the 



takes its name 



from Fort Bridger, whicli stands iu the 

 valley of Blacks Fork about 10 miles south 

 of Carter station. To the traveler on the 

 train this formation is not readily dls- 



track, are composed of rocks belonging 

 to this formation. Probably those most 

 noticeable from the train are the buttes 

 near the station of Church Butte, which 



ma: 



■ing 



■cinity, especially 



takes 

 group. 



Most 



of the formations exposed in 

 western Wyoming and eastern Utah are 



