Stevenson.] ^^^5 [Oct. 7, 



8. Sandstone 6' 



9. Concealed 122' 



10. Sandstone 10' 



11. Concealed 12' 



12. Sandstone 8' 



13. Goal bed 5' 



14. Sandstone 6' 



15. Concealed 20' 



17. Shale 5' 



18. Goal bed 2' 



19. Imperfectly exposed, much whitish sandstone ... 75' 



20. Sandstone 10' 



21. Concealed 160' 



22. Goal bed 3' 2" 



23. Clay 1' 



24. Sandstone 30' 



With this all exposures cease along the line examined, but Mr. Alex. 

 Bowie, local superintendent of the coal mines at Rockvale on Oak creek, 

 states that another bed of coal has been seen by him below the sandstone. 

 Pnfortunately no determination of the distance was made by him. 



The conglomerate at the top of the section is very coarse and altogether 

 unlike any rock seen elsewhere in the field. If Mr. Bowie's observations 

 be accurate, this rock is higher in the series than any exposed in the typi- 

 cal section obtained on Oak creek and it has been eroded from the mesas 

 in the southern part of the field, from Chandler creek southward. The 

 sandstones down to No. 12 are soft, with a yellowish tint and readily dis- 

 integrate when exposed to the weather. Thin beds of shale occur here 

 and there in the upper part, but are not persistent and they have been ig- 

 nored in making up the section. 



The Goal bed, No. 13, is exposed at the roadside as one enters the gap 

 from the west. Its dip is 85 degrees at the top of the shaft and 75 degrees 

 at the bottom. No detailed measurement was made as the shaft has been 

 abandoned and the edge is unsafe. The bed shows five benches of coal, 

 with a layer of dark shale fully 5 inches thick. A parting of sandy clay, 

 nearly 2 inches thick, appears to be persistent. Goal bed, No. 18, has been 

 opened by a shaft probably 20 feet deep. The dip is irregular but is some- 

 what more than 75 degrees. The coal so far as exposed is friable and 

 worthless. No bed was seen between this and No. 24, but Mr. Bowie 

 states that another bed exists in this interval and that it is shown at a little 

 way from the line followed. It is 1 foot 7 inches thick and contains very 

 fair coal. No. 22 dips at 85 degrees, almost due east ; it is in four benches, 

 separated by thin partings of sandy shale. It has been opened by two 

 shafts, each about 20 feet deep ; but the coal as far as seen is badly broken 

 by exposure to the weather. 



In the absence of detailed measurements below the bed, No. 22, one may 

 not undertake to identify these beds with any in the Oak creek section ; 



