Stevenson. 1 J-*^t) [Nov. 21, 



road grade near Mendota iu Washington county, which, condensed, is as 

 follows : 



Chemung. 



1. Shales and sandstones, shales gray to reddish blue, 



sandstones gray and flaggy 33' 



2. Sandstone, above brownish-blue, hard, irregular 



fracture, flaggy with nodules of clay ; belcw 

 irregularly flaggy, clayey, micaceous, with large 

 fucoids 31' 



3. Conglomerate 0' 4" 



4. Sandstone, brownish, fossiliferous, with Spirifera, 



Rhynchonella, Chonetes, GoniopJiora, Edinondia, 



etc 11' 8" 



5. Conglomerate, ferruginous, pebbles as large as 



chestnuts 0' 1 0" 



6. Sandstone with some fossils 5' 



7. Conglomerate 0' 6" 



8. Sandstones, not wholly exposed, with Spirophyton 



and ^Productella in the lower portion 268' 



350' 



The upper part becomes harder and thicker further eastward.. Whether 

 or not the conglomerates are persistent was not determined, but no frag- 

 ments of them were seen at any locality beyond Little Moccasin creek ; 

 nor were any traces seen on Little Walker mountain along the road lead- 

 ing from Lyons gap to Chilhovvie Springs. 



The Chemung appears to be wholly absent along Stone mountain in Lee 

 and Wise counties and no trace of it was found along Buckner's ridge in 

 Scott county between the Hamilton black shale and the Lower Carbon- 

 iferous limestones. But the group is present further east among the Clinch 

 faults, for it was recognized on Indian creek at the mouth of Laurel fork, 

 on Dry fork of Sandy and in Crockett's cove. 



The Hamilton consists almost wholly of shales, is ill-exposed every- 

 where and no satisfactory line of separation could be found between it 

 and the Clinton below. It was measured near Mendota, Avhere the total 

 thickness appears to be not far from 9U6 feet. The relations of these 

 shales to the group in more northern localities could not be determined as 

 the few fossils observed were so imperfect as not to be identifiable. The 

 greater part of the shales, however, appears to represent the Marcellus 

 epoch and the black shales alone remain under the Stone mountain anti- 

 clinal in Lee and Wise counties. 



The Hamilton is shown on the northerly side of Little Walker and 

 Brushy mountains; without doubt it is present on Eagle Nest and Dump 

 creeks in Russell county as well as on Dry fork of Sandy and on Cavitt's 

 creek in Tazewell county, but no separation from Clinton was attempted 

 on any of those streams. 



