INDEX. F\ 407 



Page. 



Fault in Half Falls mountain, 600'+, 88 



" cuts off VIII fossil ore, 100 



» in Carroll t. 1200' throw, 159 



11 in S. W. end of Spring t. described, .345 



" in Watts t., Half Falls mtn. ; throw, say 800' ; dies out 3 miles or so 



east of river, 380 



Fault of Little Germany described, 89 



" throws 400' to 500' at Knob, Spring t., 343 



" in Spring t, described, ... ; 346-7 



Fault intermediate, throws 200' to 300', 91 



Fishing creek, Penn t. ; Rye t., 19,283,303 



11 " run described, ... 26 



Flagstones from IX red SS., Liverpool t, good, . . 244 



Flags in middle of VIII c 1, an exceptional occurrence (in Saville t.), . 3i6 



Flint shale members of VI described, . . 59 



Flint gravel soil of VI, Centre t., 59,173 



Flint beds of VI, make tine ridge and rocky soil, narrow belt, Liverpool t.,242 

 " " section, Tuscarora t., 364 

 Flint of cornif. lime. for. of New York, not to be found in the fine expos- 

 ures of Madison t. (No corn. lim. fossils,) ... 260-1 



Folds in limestone 41 ; in VI, VII, Centre t., 185 



'• in VIII d ef belt of Watts t. numerous, 383 



Foose, (J.,) of Duncannon, . 292 



" tunnels for coal in VIII c 1, Spring t., 344-5 



Forest trees, . . 175 



•' described in Chapter III, . 43 



Formations tabulated, indexed— See end of Index, .36 



Fossils — See end of Index for list of genera and species. 



Fulling Mill gap, Centre t., 204 



Furnaces in Perry county, 102,387 



Furnace hills, N. and S., VIII c 2, ' 15 



" " beautiful scenery, Centre t., 202 



" " unproved VIII c 2 fossil ore crop, 205 



Fossils distorted by pressure, 41 



" of Chemung (VIII /) rarely well preserved, 70 



Fossil casts full of oxide of iron, (V1II-IX,) 74 



" " in Oriskany, (VII,) ... ........ 190 



" '• make up the Newport limestone, (base of VIII /,) 224 



•' " of lamellibranchs crowded in K. SS., Penn t., 287 



" « of dead drifted shells on breach of K. SS., 291 



11 "of Lejyerditia alta cover Bloomfield SS. slabs, 372 



Fossils help to show the lines of fault, 81,83 



Fossils of Clinton and L. Helderberg commingled, 51 



" of Oriskany found as high as Hamilton, 314 



Fossils of V a; abundant in ore SS.; scarce in lower shale; not frequent 



in iron SS. ; abundant in upper shale, 50 



" of iron SS. (Ya 2) in Madison t., 254 



" of sand vein ore bed, Tyrone t., 371 



" of V b scarce in the red shale, 53 



" " " in Jackson t. very interesting, 233 



11 " " red shale. Buffalo mills, Savage t., 324 



" " " " " seldom to be found elsewhere, 324 



