CONEMAUGH FORMATION IN OHIO 197 



Beturning to the western outcrop : A few insignificant areas in Vinton 

 county reach to the Cambridge limestone, which is gray fossiliferous and 

 108 feet above the Shawnee or Upper Freeport limestone. Coal beds 

 are at 31 and 50 feet below it, possibly Brush Creek, and that at an upper 

 horizon dividing the Buffalo sandstone as at some localities farther north. 

 But here, as in Jackson county, where Professor Orton found a coal bed 

 at 93 feet above the Upper Freeport and underlying a conglomerate, the 

 section is a single instance and so far from any other exposure that no 

 positive identifications can be made.* 



In Meigs county, south from Athens and extending eastward from 

 Jackson to the Ohio river, one finds the Conemaugh deeply buried in the 

 eastern portion, but exposed in the western. In this area, as in southern 

 Athens, the Pittsburg sandstone overlies the Pittsburg (Pomeroy) coal 

 or is separated from it at most by 17 feet of sandy shale. Professor An- 

 drews gives many sections. Seven miles west from Pomeroy the Ames 

 and Cambridge limestones are respectively 147 and 236 feet below the 

 Pittsburg coal bed, but nearer Pomeroy the latter interval is only 221. 

 In the western townships the Cambridge is frequently a "whitish fossil- 

 iferous" limestone, and a coal bed at the Harlem horizon often appears 

 about 60 feet above it. At 25 feet below the Cambridge is a coarse sand- 

 stone and conglomerate, of which 30 feet were seen; it is in the place of 

 the Buffalo sandstone, which belongs under the Lower Cambridge lime- 

 stone of southern Ohio, the Cambridge limestone of Pennsylvania and 

 northern Ohio. Mr Lovejoy finds the Cambridge limestone double in the 

 northwest part of the county, but the lower division becomes very uncer- 

 tain at a little way south. The Upper Cambridge, 27 feet above the 

 Lower, is 112 feet above the Upper Freeport within the interval, the 

 Anderson at 19 and the Brush creek at 45 feet below it. At another 

 localit} r , 2 miles away, Professor Andrews found the Upper Cambridge 

 at 47 and 109 feet above the Brush Creek and Upper Freeport coals. 



Five or six miles west from Pomeroy, red shale, 19 feet thick, is at 50 

 feet below the Pittsburg, and a coal bed near the Barton horizon is at 203 

 to 205 feet. Eed shale is exposed above the Ames at one locality, and at 

 another that limestone overlies a bed, 35 feet, the place of the Pittsburg 

 reds. The Mahoning is often sandstone, and Mr Lovejoy gives it as 56 

 feet in one measurement. The whole thickness of Conemaugh at 6 miles 

 west from the Ohio river is about 350 feet. 



Professor Orton publishes the record of a well drilled at Pomeroy, 

 beginning 64 feet below the Pittsburg coal bed. The record is im- 



* E. B. Andrews : Report for 1870, p. 117. 

 E. Orton : Vol. v, pp. 1025-1026. 



