Stevenson.] i44:U [jau. 21, 



4. Coal led 1' 2" to 3' 



5. Sandstone 20' 



6. Coal bed and shale , 1' 



7. Sandstone 200' 



8. Conglomerate 100' 



9. Concealed 60' 



10. Sandstone 45' 



11. Coal bed 0' 6'^ 



13. Shale, clay and sandstone 40' 



13. Flaggy sandstone 15' 



14. Massive sandstone 120' 



15. Concealed 45' 



16. Coal bed with much shale 5' 



17. Imperfectly exposed, much conglomerate 95' 



18. CoaZ 5ecZ and shale 1' 8" 



19. Shale 20' 



20. Goal bed and shale 2' 



21. Clay 7' 



32. Sandstone 15' 



23. Pots of coal in sandstone 7' 



24. Conglomerate 45' 



Total 1009' 2" 



The rocks are vertical ; but the gorge is very crooked and some diflSculty 

 was encountered in the effort to estimate the thickness of No. 7, which 

 may be somewhat greater than is given above. 



No. 1, the "Bee Rock" of Big Stone gap, forms a conspicuous comb 

 along Stone mountain from Little Stone gap to certainly 3 miles west from 

 Pennington's gap, and it is well shown at the head of each gap. The 

 upper part is flaggy and rather fine-grained ; but below, the rock becomes 

 massive and coarser, with numerous pebbles. No bedding is perceptible 

 for 65 feet from the bottom. Some plant impressions were seen and there 

 is much carbonized wood in large fragments. The shales underlying this 

 rock are brown to reddish brown, clayey and without distinct bedding. 

 The sandstone, No. 3, is blue and flaggy in the upper part, but becomes 

 gray and shaly below. 



The Coal bed, No. 4, is much crushed and its thickness has been much 

 reduced by the violent pressure. It is badly twisted and is from 14 inches 

 to 3 feet thick. The coal is good, caking, admirable for blacksmiths' use 

 and contains much mineral charcoal. The underlying sandstone is argil- 

 laceous and near the coal it is really a sandy fireclay containing many 

 stems and rootlets of Stigmaria. The little Coal bed, No. 6, is but 5 inches 

 thick and has black shale both above and below it. 



No full exposure of the sandstone, No. 7, could be found. The mass 

 varies from fine-grained sandstone to coarse conglomerate and holds some 

 bands of shale. A Coal bed is said to occur in this interval, but no traces 

 of it were seen. Nos. 8 and 10 are conglomerate. The latter crosses the 



