CONEMAUGH FORMATION IN OHIO 191 



which becomes the important bed in Morgan and other counties beyond 

 toward the south. Here Professor Andrews found 6 inches of fossil- 

 iferous ore on 6 inches of f ossiferous shale resting on the Anderson 

 coal bed, 1 foot 6 inches thick and 10 feet above the Cambridge limestone 

 proper, also fossiliferous, which is 125 feet above the Upper Freeport 

 (Cambridge) coal bed. Farther south he finds a fossiliferous limestone, 

 below which, at 90 feet, is another fossiliferous limestone, dark blue and 

 sandy, resting on a coal bed. Still farther south, and near the "Washing- 

 ton County line, he finds the lower limestone resting on its coal bed. 

 The higher limestone is the Ames and the lower, or main portion of 

 the Cambridge, is about 100 feet below it. An oil record on the border 

 of Washington county and 18 miles northeast from the Browns Mill 

 well, in Morgan county, shows the Ames at 125 feet above the Cam- 

 bridge with the 140-foot, or Cowrun, sandstone, 5 feet thick and .26 feet 

 above the Cambridge. It overlies a thin coal bed separated from the 

 limestone by red shale.* 



Monroe county is east from N"oble and extends to the Ohio river. The 

 Conemaugh and even much of the Monongahela formation are deeply 

 buried. The Pittsburg coal bed is insignificant and in a great part of 

 the county it is wanting; the well records are of the ordinary type and 

 the thinner limestones can not be recognized, but the "Big Lime" of the 

 Lower Carboniferous is persistent. The Mahoning and other sandstones, 

 so insignificant on the western outcrop, reappear in these records, and it 

 is not altogether easy to correlate them with those in Noble and Morgan, 

 as the "Big Lime" is not present in those counties. Professor Bownocker 

 gives records of borings in Summit, Wayne, Perry, Jackson, and Green 

 townships, and Doctor White adds one on the Ohio river opposite Sister- 

 ville, in Tyler county of West Virginia. These extend southeastward 

 across the county, the first being about 6 miles west from the Noble 

 County line. A thin coal bed is present in most of them and it is taken 

 as the main horizon, the numbers indicating distance below it. 



Feet. Feet. Feet. Feet. Feet. Feet 

 Coal bed [Pittsburg] .... 

 Big Red : 



Top 153 105 



Bottom 253 245 



Cowrun sandstone : 



Top 453 507 520 470 534 430 



Bottom 678 900 540 485 565 480 



Coal bed [Brookville] . . 678 705 



"Big Lime" 1032 1060 1060 1050 



* E. B. Andrews : Vol. ii, pp. 510, 511, 513, 515, 517, 518. 

 J. A. Bownocker : Bulletin no. 1, p. 1G0. 



