194 J. .T. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



the Pittsburg. The "Big Red" rests on the Ames, but is only from 

 15 to 40 feet thick. Two other reds, 5 and 20 feet, are at 10 and 30 feet 

 above the Cambridge, but are not present in all of the wells.* 



Crossing into Washington county, east from Morgan and Athens, south 

 from Noble, and extending to the Ohio river, one finds the Conemaugh 

 for the most part deeply buried; but the Cowrun anticline brings it up 

 in a narrow strip east from the middle line of the county. 



A well record reported by Professor Bownocker from the northwestern 

 part of the county shows the Cambridge limestone at 120 feet below the 

 "Big Red/' which is 95 feet thick, broken by 15 feet of shale. The 

 Ames is not reported here, but it is present at 3 miles northeast, on the 

 Morgan border, where it is 4 feet below the "Big Pied." The Pittsburg 

 coal is wanting at both places and no coal appears in the section for 180 

 feet above the place of the Ames. In one record a sandstone 35 feet 

 thick and overlying a thin limestone is at 135 feet above the Ames, evi- 

 dently belonging almost directly under the place of the Pittsburg. Tu 

 the more northerly well the Cambridge is apparently about 125 feet below 

 the place of the Ames, and so somewhat less than 300 feet below the 

 Pittsburg. Macksburg, on the Noble County border, is at 17 miles 

 northwest; there the Ames is 125 feet above the Cambridge and the latter 

 is 363 feet below the Macksburg coal bed, which is about 90 feet above 

 the Pittsburg. The first, or 140-foot, sand of this region, the Cowrun, 

 is 35 feet thick at Macksburg and its top at a mile east in Noble county 

 is 99 feet below the Ames. The interval from Pittsburg to Cambrdige 

 is somewhat less than in western Washington. A great sandstone 78 feet 

 thick begins at 176 feet below the Cowrun and continues to 523 feet 

 below the place of the Pittsburg. This has been correlated with the 

 Mahoning, but it belongs more probably in the Allegheny in part, for the 

 bottom of the Mahoning in southern Monroe, 18 miles northeast, can not 

 be placed lower than 480 feet below the Pittsburg. 



Thirteen miles east of south from Macksburg and 15 miles southwest 

 from Green township of Monroe county is Cowrun, in Lawrence town- 

 ship of Washington. The Cowrun uplift passes north and south through 

 this township and exposes the Conemaugh to about 70 feet below the 

 Ames limestone. Good exposures of the interval above the Ames are 

 rare, but Professor Andrews found a limestone at 98 feet below the Pitts- 

 burg, 136 feet above the Ames in both Lawrence and Newport townships, 

 and in the latter a coal bed at 40 feet above the limestone, which is at the 



* E. B. Andrews : Vol. i, pp. 264-265, 270, 273-274, 278, 280, 289. 

 E. Lovejoy : Vol. vi, pp. 632-633, 645-646. 

 J. A. Bownocker : Bulletin no. 1, pp. 132-133. 



