index. F. 427 



Page. 



Group Via, leuistown limestone. 

 •■ sometimes crowded with Leperditia alto, ... 180 



" place of the Waterlime formation in X. Y., . ... 180 



11 dark when freshly broken: weathers whitish ; shows lamination ; 



often very bituminous, "sulphury ;" Center t., ... 180 



M makes a hot, fat, strong lime, 180 



11 not dolomitic in Center t., 180 



44 blue limestone quarry rock in Madison t., . 259 



" 40 thick in Saville t., 325 



Group o/ VI b, Clark's Mill lime shale. 



" described in Centre t., 57,181 



" 150' thick at Clark's mills, 60 



" jPentamerus Lower lii?iestone ofSev? York, 61 



<J fossils enumerated, 61 



" L ewis town lime s hales of Report F, 181 



u seldom quarried in Madison t., 259 



M quarried at Bixler's mills, 259 



" Meristella beds, &c, fossils, not many here, 259 



" exposed near Falling spring, Spring t., 337 



" Stromatopora bed well exposed, . . 337 



11 exposed in Gibson's old quarry, Spring t., . . 337 



Group of Vic, Black Cherty limestone. 



" 8' thick, as described, 60 



" well exposed at Half Falls mountain, Buffalo t., 149 



" well exposed at Millerstown, 218 



" outcrops in Miller t., . . 266 



Group> VI d, Yellow flint shales. 

 " 80' in general section, 59,60 



Group Vie, White flint shales. 



" 10' in two beds, Half Falls mtn., described, 59,60 



" crowded with fossil casts, 60 



41 make hue ridge in Liverpool t 242 



u land surface covered with fragments, 242 



u can be traced in Rye t., nearly to Sterrett's gap, 309 



Formation No. VII, Oriskany sandstone. 



11 possibly coeval with Corni/erous limestone, 63 



" 25', never more; described, 62 



" thin and sometimes absent in Pfoutz's valley, 62 



" thickest in Sherman valley, 62 



11 often fossiliferous ; casts only, 63 



M very ferruginous in N. W. townships, 63 



" no real iron ore bed, 63 



" no glass sand, 63 



" beautiful puipit rocks, especially near Bloomfield, 63 



" folded into VI, repeatedly, 63 



" outcrops on Perry furnace road, 85 



«' faulted, 89 



11 very ferruginous N. E. of Plain : no ore, ...... 101 



" no sharply defined limit at base ; because top of VI grows sandy up- 

 wan K . . . 149 

 " conglomerate of fine white pebbles, Buffalo t., 150 



