206 J. J. STEVENSON— CARBONIFEROUS OF APPALACHIAN BASIN 



in Ohio ; frequently present as sandstone in Ken- 

 tucky, as well as in many sections within West 

 Virginia, but not named in either state except in 

 northern part of the latter; Connoquenessing of 

 the Maryland reports. • 



Quakertown coal bed In Quakertown shale of I. C. White in Pennsylvania 



(I. C. White.) and northern West Virginia ; Quakertown of Orton 



in Ohio ; coals 2 and 2a of Crandall and Hodge in 

 Kentucky ; not identified in southwestern Virginia ; 

 Cedar Grove (?) of Kanawha river. 



Sharon coal bed Sharon and Campbell's Ledge of I. C. White, Marsh - 



(H. D. Rogers.) burg of Ashburner in Pennsylvania; Block, Brier 



Hill, Massillon, and Wadsworth of Newberry, 

 Sharon and Wellston of Orton in Ohio ; number I 

 of Crandall and Hodge, Laurel of Norwood, Pitts- 

 burg of Crandall and Campbell, Adamsville of Les- 

 ley, Warfield of Lesley and I. C. White in Ken- 

 tucky ; not named in Tennessee ; not identified in 

 southwestern Virginia; Campbells Creek, Sharon, 

 and Cook of authors in the Kanawha region. 

 Rockcastle. 



Sharon sandstone Sharon of I. C. White, Olean of Ashburner, Garland 



(H. D. Rogers.) of Caril in Pennsylvania; Sharon conglomerate in 



Ohio ; conglomerate in northern and central Ken- 

 tucky, Corbin of Campbell in southern Kentucky ; 

 Corbin in northern Tennessee ; Dotson of Camp- 

 bell in southwestern Virginia ; Nuttall of the Ka- 

 nawha region, "salt sand" in part of drillers in 

 West Virginia. 



Jackson Shaft coal bed Jackson Shaft of Andrews and Orton in Ohio ; Barren 



(E. B. Andrews.) Fork of Crandall in southern Kentucky, not named 



in northern part of the state ; represented probably 

 by several beds in southeastern Kentucky ; present 

 in Harlan county, Kentucky, but not named by 

 Campbell ; persistent inWest Virginia,Virginia, and 

 northern Tennessee, but not named by observers; 

 probably bed underlying Sharon sandstone on the 

 Potomac; disappears northward in central Ohio 

 and West Virginia; removed by erosion from 

 southern Tennessee and northern Alabama. 



Rockcastle sandstone The hornstone bearing part of the conglomerate in 



(M. R. Campbell.) Ohio underlying Jackson Shaft coal bed; Rock- 



castle of Campbell in Tennessee and southern Ken- 

 tucky ; "Bee rock" of Campbell and Stevenson, 

 Bearwallow (?) of Campbell in southwestern Vir- 

 ginia ; removed from northern Alabama and most 

 of southern Tennessee ; may be Gibson's Third 

 conglomerate in Alabama ; present in middle and 



