ENDEX. P a . 425 



Page. 

 Formation No. V b, Onondaga shale. 



" sub-divided in Madison t., 256 



" 1400' thick in live t. ; lower (red) layers not well exposed ; 400' sec- 

 tion of upper beds complete at the Susq. river bridge, . . . 312,313 



" makes Raccoon valley, Saville t., fertile, 324 



" non-fossiliferous, . . . 324 



" fossil iferous at Buffalo mill, Saville t., . . 324 



" crop a mile wide (Elliotsburg valley) bet. Limestone and Mahony 



ridges, Spring t., . . . 335 



" makes broad flat plain around Bridgeport, 336 



11 makes (Polecat) valley bet. Blue mtn. and Pisgah hill, 336 



" vertical along Raccoon valley, Tuscarora t., 363 



Group Yb 1, Bloomsburg red shale of Report G 1 . 



" no Clinton fossil form as yet found in it, 51 



" fossiliferous only in a few places, 51 



" 700' thick ; spotted green, 53 



" 830' thick in Madison t., 255 



11 good section got west of Waggoner's mill, 256 



" fills all the synclinal valleys of Toboyne t., 359 



" 700' thickness of red shale well exposed south of Landisburg, .... 371 



" saddles all the anticlinals of Tyrone t., . . 373 



Group V b 2, Bridgeport sandstone. 



" described ; Bistline's Mill section, 57 



" 5' thick ; under 200' ; over 500' red shale, 58 



" at Bistline's mill, and at other places in the county, . . 255 



" curious bed of flinty sandstone, cropping out on Sherman's creek, 



south of Bridgeport on the Welsh mtn. anticlinal, 336 



11 makes Quaker hill, Spring t., 336 



Group Vb S, Onondaga variegated upper shale. 



" 700' thick over Bloomsburg red shale, . . 54 



" 200' to 250' (?) grey shale at foot of slope and in fiat of valley, Cen- 

 tre t., ... 179 

 " absent from the Susquehanna river bridge section in Rye t., 313 

 11 700' to 800' thick in Tyrone t., measured from Bloomfield SS. down to 



solid Bloomsburg red shale, 372 



" (327 ) in the Landisburg section, 372 



" well exposed in Sherman's cr., H m. W. of Loysville, 373 



" 800' of upper more calc. beds here seen, 373 



" may be traced several miles along middle of Kennedy's and Shaeffer's 



valleys, . . 373 



'* gray shales, over top of Landisburg section and under VI ; as usual, 



about 200 feet, 372 



Group V b 4, Bloomfield sandstone. 



" described; thin in Centre t. ; makes ridges, 54,177 



" .makes a low ridge along the middle of valley, 179 



" noticed in Jackson t. : nineteenth mile-stone section, 233 



Formation No. VI, Lower Helderberg. 



" limestone ranges described, 12 



" formation stops at Sterrett's gap, 14 



" formation as a whole described, 58 



" limestone bottom beds bituminous, 58 



