GEOLOGICAL SUEVEY OF THE TERRITORIES. 539 



City, wTiere we stopped and made some examinations, the results of 

 ■which are given elsewhere by Mr. Meek. 



EvAisSTON. — After leaving Bear Eiver City and Aspen, we spent a 

 day or two at Evanston, and made sections of the rocks about the coal- 

 mines at Almy, on the north side of Bear Eiver, some three miles to the 

 northwest of the station. The section given below was taken in the 

 hill back of the mines, and though not altogether a continuous one, it 

 nevertheless represents pretty fairly the general character of the beds 

 and their alternations. Nos. 1 to 24 inclusive were taken from near 

 the summit of the hill down to the bottom in a ravine, which enters the 

 bottom-lauds of Bear Eiver a mile and a half or more east of Almy ; of 

 the rest, Nos. 25 to 39 inclusive were taken from exposures in a ravine 

 immediately back of the village, and the remainder chiefly from artifi- 

 cial exposures at the mines. The thicknesses as here given of the dif- 

 ferent beds, except in the case of the last-named ones, are, as in most 

 of our other sections, estimates made by the eye, more accurate meas- 

 urements being impracticable with the attention we were able to give : 



Section of Mil hack of the Almy coal-mines. 



Feet. . 



1. Coarse, pebbly, conglomerate with some intercalated sand- 



stones and clays , 50 



2. Yellowish and gray sandy clays, or soft, decomposing sand- 



stone = 70 



3. Massive gray, sandstone 6 



4. Yellowish and gray sandy shales or soft sandstone 8 



5. Coarse grayish sandstone weathering brown 25 



6. Eeddish and yellowish sandy clays or shales 100 



7. Coarse grayish-brown sandstone and conglomerate 15 



8. Eeddish and ash-colored sandy clays or shales 100 



9. Massive light-grayish sandstone 12 



10. Yellowish sandy clays 15 



11. Coarse, pebbly, reddish-gray sandstone 15 



12. Soft grayish sandstone passing downward into decomposing 



reddish conglomerate = 52 



13. Yellowish sandy clays, some sandstone at base. . . , 50 



14. Sandstone and conglomerate , . . , 25 



15. Gray and yellowish-gray sandstones and sandy shales 45 



16. Coarse sandstone and conglomerate 8 



17. Sandy clays or shales, some parts reddish 50 



18. Conglomerate passing into coarse sandstone „ 16 



19. Yellowish sanely clays or soft sandstone 32 



20. Conglomerate 22 



21. Yellowish or reddish sandy shales or clays 50 



22. Conglomerate ; 13 



23. Yellowish sandstone and sandy clays : . 50 



24. Coarse conglomerate 140 



25. Yellowish and whitish sandstone with some sandy clays 170 



26. Dark-grayish sandstone and shales 22 



27. Light-colored sandy cla^ s or shales 12 



28. Grayish-buff sandstone 10 



29. Grayish sandy shales with apparently some carbonaceous seams 



near base 150 



30. Eeddish and gray sandstone 12 



31. Grayish shales or sandy clays 150 



32. Eeddish and gray sandstone 4 



