GEOLOGICAL SURVEY OF THE TERRITORIES. 537 



As far west as Carter tlie flat table-topped hills, composed of the whitish 

 beds of the superior Bridger group, characterize the scenery, but be- 

 tween that station and Bridger the underlying greenish and reddish gray 

 sandstones appear, and near the latter station predominate. About a 

 mile or more southwest of the station, in a hill on the right bank of 

 Muddy Creek, and near the railroad track, the following section was 

 taken wdiich I copy from Mr. Meek's note-book. It shows the general 

 character and variations of the lower formation, which is characterized 

 by more massive sandstones and clayey beds, differing in color and 

 other respects from the shales above : 



Section near Bridger Station. 



Feet. 



1. Alternations of gray, rather coarse sandstones, and reddish and 



ash-colored arenaceous clays, some layers of the sandstone 



fossiliferous 165 



2. Massive gray sandstone, stained reddish above 13 



3. Ash-colored and reddish sandy clays 23 



4. Gray sandstone 3 



5. Eeddish and yellowish-gray sandy clays 16 



6. Massive grayish sandstone, stained reddish above 23 



7. Eeddish and ash-colored sandy clays 20 



8. Gray sandstone 4 



9. Whitish sandy clays 3 



10. Gray sandstone 2 



11. Eeddish sandy clays with some soft sandstone 15 



12. Gray massive sandstone 8 



13. Eeddish and yellowish clays 10 



14. Grayish sandstone •. . 5 



15. Eeddish and ash-colored arenaceous clays, with perhaps some 



layers of sandstone 42 



The upper inember of this section closely resembles, and is probably 

 identical with, the beds forming a hill on the southeast side of the rail- 

 road-track three-fourths of a mile or more northeast of the station. The 

 same fossils (chiefly rough casts of a Melania.n and a Unio) occur in a thin 

 layer near the top of the hill. The dip in both cases was the same, 

 nearly east, from 4P to 6°. From the summit we could see the reddish 

 layers in ledges to the eastward, thus indicating that we were far, 

 perhaps many hundred feet, below the top of the series.. The beds 

 seemed to dip unconformably below the more horizontal whitish strata 

 of the Bridger group, and at one point, at least, I saw a patch of 

 the upper formation lying between the ridges of reddish sandstone. It 

 would thus appear that there had been considerable denudation here, 

 and that portions of the upper group had been washed away, leaving 

 only these outlines to indicate their greater extension in former times. 



Piedmont. — Beyond Bridger the railroad, following the valley of 

 Muddy Creek, turns to the south, and then bends slightly to the eastward, 

 carrying the traveler again into the area of the higher group, but still 

 showing at the base of thejiills the heavy grayish sandstones and red- 

 dish clays of the Wasatch formation. The junction was well observed 

 in some high hills about a mile, or little more, east of Piedmont Station, 

 in which the lower, 210 or 211 feet, was made up of the heavy-bedded^ 

 grayish sandstone, weathering reddish, with intercalated beds of softer 

 sandy clays, the whole without, as far as we could detect, any trace of fos- 

 sils, either animal or vegetable. Above this we roughly measured with a 

 pocket-level some 229 feet of whitish beds, mostly argillaceous, but with 



