1O6 STRATIGRAPHY THE DUNKARD SERIES. 



DESCRIPTION OF FORMATIONS. 



RUSH RUN SANDSTONE. 



The Rush Run Sandstone of Hennen 1 , the highest forma- 

 tion of the Dunkard Series definitely recognized in Lewis 

 and Gilmer, appears only in a few of the highest knobs along 

 the northwestern border. It is usually soft, massive, green- 

 ish brown and micaceous. In Chapter IV its thickness and 

 position are noted in the sections for Hurst and Conings, and 

 in the present Chapter it is noted in the Dry Fork Section. 

 So far as observed it has not been quarried. 



JOLLYTOWN SANDSTONE. 



The Jollytown Sandstone of Hennen 3 appears in some of 

 the high hills along the northwestern border. It is usually 

 soft, massive and brown. In Chapter IV its position and 

 thickness were noted in the sections for Hurst and Conings, 

 and in the present Chapter it appears in the Dry Fork Sec- 

 tion. No quarries were observed. 



HUNDRED SANDSTONE. 



The Hundred Sandstone of Hennen 2 occurs in some of the 

 high knobs along the northwestern border. At Racket, on 

 the Ritchie-Gilmer Line, it forms a prominent cliff, 1210' above 

 sea level. In Chapter IV it is noted in the sections for Con- 

 ings, Hurst and Newberne, and in the present Chapter it is 

 recorded in the Dry Fork Section. At Conings it was being 

 quarried locally for chimney blocks and stove pipe fittings 

 but its soft character would usually make it unfit for build- 

 ing stone. 



UPPER MARIETTA SANDSTONE. 



The Upper Marietta Sandstone, a member of the group 

 first described by White 4 as the Marietta Sandstones, and later 



'Ray V. Hennen Marshall-Wetzel-Tyler Kept., W. Va. G. S., p. 191; 

 1909. 



2 Ray V. Hennen, Marshall-Wetzel-Tyler Rept., W. Va. G. S., p. 196; 

 1909. 



3 Ray V. Hennen, Marshall-Wetzel-Tyler Rept, W. Va. G. S., p. 214; 

 1909. 



I. C. White Bull. 65, U. S. G. S., p. 35-36; 1891. 



