836 /. A. BOWNOCKER 



and about 580 feet below the Pittsburg, as is shown in the 

 following partial log of George Rice Well No. 18, at Macksburg. 1 



Meigs Creek coal 



First Cow Run sand 



Dunkard sand (300-foot) - 



500-foot sand 



Sand, pebbly (800-foot) 



Slate .... 



Salt sand - 



This sand commonly ranges from 10 to 30 feet in thickness. 

 It is usually quite coarse, but does not become a conglomerate. 

 Like the First Cow Run sand, it does not form a continuous 

 stratum, but is decidedly patchy. Stratigraphically considered, 

 the formation belongs near the top of the Conglomerate Coal- 

 measures, and its position with reference to the Cambridge lime 

 and Dunkard sand strongly indicates that it is the Tionesta sand- 

 stone. 



The Second Cow Run and the Macksburg 500-foot sand have 

 been regarded by many as equivalent. As has already been 

 suggested by Professor White, however, this cannot be the case. 2 

 Examination of the record of the Rice well shows that the inter- 

 val between the First Cow Run and 500-foot sands is only 307 

 feet, while, as already stated, the interval should be 400 feet. 

 Measuring from the Meigs Creek coal, equally conclusive figures 

 are secured. Thus the Second Cow Run sand lies 840 feet 

 below the Meigs Creek coal, while the interval between this seam 

 and the 500-foot sand is only 670 feet. The sand at Macks- 

 burg known as the 800-foot is probably the equivalent of the 

 Second Cow Run. 



The First Cow Run sand. — This is the most important and 

 best-known sand of the group. As is shown in the record of the 

 Dunn well, its position is 100 feet below the Ames limestone. In 

 western Morgan county, near the outcrop of the sand, the inter- 

 val ranges from 70 feet to 100. The Ames limestone there lies 

 170 feet below the Pittsburg coal. The identification of the 



1 lVesl Virginia Geo/. Sur., Vol. I, p. 298. 



3 West Virginia Geological Survey, Vol. I, p. 299. 



