106 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



the interval increases southwardly to 20, 30, and in central Greene coimty 

 to 40 feet. The increase is less rapid southwestwardly, for it is only 

 27 feet in Richhill of northwest Greene. The place of this limestone is 

 not reached north from the borough of Washington. It is thick in 

 Washington, but in Greene it is rarely more than 3 feet, is usually earthy, 

 and it disappears toward the southwest. The Eogersville limestone, 

 VIII of volume K, must be regarded as confined to central Greene 

 county, where it is 19 to 35 feet above the Ten-mile. Where last seen 

 before passing under the higher beds, it is earthy, so that one is not sur- 

 prised to find no traces of it in western Greene. A limestone is reported 

 occasionally in five townships of Washington county at 65 to 80 feet 

 above the Upper Washington, the place of the Eogersville. There are 

 evidently many limestone lenses at this horizon. 



The Jollytown limestone (I. C. White, 1891), IXa of volume K, is 

 a persistent deposit in a small area. It seems to be continuous in western 

 Greene and the adjacent part of West Virginia and it may be present in 

 the extreme southwest corner of Washington county. Its place is con- 

 cealed at all localities examined in Franklin, a central township of 

 Greene, but the Eogersville is persistent there, as also farther east in 

 Jefferson where a limestone is present at the proper distance above the 

 Eogersville, as measured in Center township. This bed was seen in 

 Perry township 9 miles south. The evidence is rather in favor of re- 

 garding this limestone, which Stevenson took to be the Nineveh, as at 

 the Jollytown horizon. The interval from the Jollytown to the Upper 

 Washington limestone decreases southwardly, in 12 miles, from 140 feet 

 in Center township to 29 feet at Jollytown, on the West Virginia line; 

 and this small interval prevails along the southern line, for near Belton 

 and Board Tree, in Marshall of West Virginia, it is shown by Doctor 

 White's sections to be only 30 feet. The maximum is in Center, for west- 

 ward in Aleppo the measurement gives only 115 feet, while northwardly 

 it decreases rapidly. 



The Nineveh limestone (I. C. White, 1891), X of volume K, is 25 to 

 35 feet below the Nineveh coal bed which underlies the Nineveh sand- 

 stone. It remains in several townships along the southern line of Wash- 

 ington county, the most northerly point at which it has been recognized 

 with certainty being about 30 miles south from the extreme northern 

 outcrop of the Upper Washington. It was seen at every place in Wash- 

 ington and Greene exposing its place. It is equally well marked in West 

 Virginia, where Doctor White has recognized it in almost every county, 

 reaching its place as far south as Jackson county, beyond the Little 

 Kanawha river. It is evidently the high limestone of Professor Andrews's 



