

CONEMAUGH FORMATION EAST OF ALLEGHENIES 165 



mass of black shale with only thin streaks of coal. All of these changes 

 appear within an insignificant area. 



The Harlem (Friendsville) coal bed has been recognized in the north- 

 ern, or Georges Creek, region at about 100 feet above the Barton, but it 

 is very thin. The Elk Lick coal bed and another a few feet higher seem 

 to be equally persistent. The Franklin, certainly very near the Little 

 Clarksburg horizon, shows variations as abrupt and as interesting as those 

 of the Barton and Brush Creek. A bed at 50 to 90 feet below the Pitts- 

 burg, sometimes divided into two beds, is correlated with the Little Pitts- 

 burg of western areas. The unstable conditions still prevail, for the bed 

 is often broken by partings whose thickening leads to distinct division of 

 the bed. 



In Tucker county of West Virginia Doctor White finds coal beds at 

 16, 130, 173, 204, and 404 feet below the assumed place of the Pittsburg 

 coal bed, the lowest being 180 feet above the Upper Freeport. The only 

 limestone is 20 feet thick and 42 feet above the Upper Freeport; there- 

 fore at the Mahoning horizon. The lowest coal bed is not far from the 

 place of the Barton, but the relations of the higher beds can hardly be de- 

 termined in the present state of information. 



The exposed sections and bore-hole records show no red shales in the 

 Conemaugh east from the Alleghenies. 



Professor Clark and his associates have recognized the Morgantown and 

 Connellsville sandstones as well , as the Pittsburg and Clarksburg lime- 

 stones; whether or not the correlations of the several coals, limestones, 

 and sandstones be absolutely exact is unimportant; they show sufficiently 

 the similarity of conditions east and west from the Allegheny mountains.* 



FIRST BITUMINOUS COAL BASIN OF PENNSYLVANIA 



The Conemaugh is recognizable in this basin with certainty no farther 

 north than Center county, where a few feet of rock overlie the Upper 

 Freeport coal bed. In Clearfield county Doctor Chance finds the Ma- 

 honing at Morrisdale with the Gallitzin coal bed near the bottom and 

 separated by 40 or 50 feet of shaly measures from a coal bed which he 

 correlates with the Upper Freeport. Near Houtzdale, 8 miles southwest, 

 Doctor White's section shows the Mahoning 100 feet thick and holding the 



* I. C. White : Geology of West Virginia, vol. ii, p. 235. 

 C. C. O'Harra : Maryland Survey, Allegany county, p. 119. 

 C. S. Prosser cited in same, p. 122. 

 G. C. Martin : Garrett county, pp. 127-128, 134. 

 W. B. Clark et al. : Vol. v, pp. 307-308, 344, 348-349, 350-368, 372, 376. 



