450 



NEW YORK STATE MUSEUM 



Camptonites, 39G 2 . 

 Cassin formation, 3G2 7 -G4 9 . 

 Cenozoic history, 290 r -92 s . 

 Chalcopyrite, 304 6 . 

 Chainberlin, cited, 441°. 

 Champlain dikes, age of, 39G-97 5 . 

 Champlain valley, 43S 3 . 

 Chazy formation, 282 7 -83 4 , 365 1 , 389*- 

 90 9 . 



Cheirurus polydorus, 36G 9 . 

 Chemical analyses, 33l 3 -38\ 350 5 -5l 4 , 



39T 8 , 398*-99 4 . 

 Chlorite, 304 7 , 348 7 , 351 9 , 352 T . 

 Cumings, cited, 377 s , 383 7 . 

 Cushing, H. P., cited, 374 3 . 



Dannemora formation, 303 1 . 



Darton, cited, 397 s . 410 2 . 



Diabase, 278 9 , 348 9 -54 2 , 355 7 , 35G 2 ; 

 analyses, 351 1 , 353 5 . 



Diabase dikes, 345 7 , 346 6 , 348 9 -54 : ; 

 faulting, 403 s . 



Diana syenite belt, 315*. 



Dikes, 278 7 , 345 6 ; black. 279 2 ; dia- 

 base, 345 7 , 34G 6 , 348 9 -54 2 , 403 s ; red. 

 279 1 ; syenite, 346 7 . See also 

 Basic dikes ; Champlain dikes. 



Drainage, 437 6 -45 3 ; present, youthful 

 character of, 442M5 5 . 



Eakle, cited. 351 9 . 

 Elevation, main axis of. 427 2 -29-. 

 Emmons, cited, 369 9 , 372 s , 3S0\ 

 English river, 440*. 

 Enstatite, 300 7 . 

 Epidote. 304 7 , 348 7 , 3ol 9 . 

 Erosion, paleozoic, 288 6 -89\ 

 Erosion interval, surface topography 

 at close of, 277\ 



Faults, 403 5 -12 1 ; crossing Appalach- 

 ian uplift, 422 1 ; production of, 

 286 6 ; as topographic features, 

 430 2 -33 2 . 



Feldspar, 295 9 , 297 3 , 299°. 300 7 , 301 1 , 

 304 4 . 304 7 , 309 2 , 309 7 , 309 9 , 313 1 , 

 313 3 , 313 7 . 319\ 319 5 , 320 6 , 321*, 

 32G 7 , 328 s , 328 s , 329 7 , 334\ 336*, 

 337 3 , 337 s , 338 7 , 339 s . 348 3 , 348 8 , 



349 2 , 349 4 , 349 9 , 331 8 , 352 2 , 352 4 , 

 352 s , 352 7 , 354 7 , 354 9 , 355\ 35G 2 , 

 356 7 , 395 6 , 396 2 ; white, 311 1 . 



Folds, 402°-3 4 . 



Foliation, 399 9 -402 5 . 



Fourchites, 396 2 . 



Gabbros, 275 s , 306 7 , 327 8 -31 3 , 335 9 , 

 338 7 , 340 5 ; analyses, 332 7 , 353 4 . 



Garnet, 295 s , 296% 304 6 , 30G 4 , 309 1 , 

 309 s , 311 6 , 313 5 , 313 6 , 314\ 319\ 

 328 9 , 334 4 , 335 s , 337 1 , 337 5 , 337 s , 

 354 s 



Geologic history, summary of, 272 7 - 

 94 3 . 



Glacial history, 292 s -93 s . 



Gneisses, 273 3 , 294 9 , 295 7 , 338 2 , 343 1 , 



356 5 ; analyses, 333 3 ; doubtful, 



299 6 -303 3 . 



Granites, 275 s , 322- 5 -27 s , 338 6 , 338 9 ; 



foliation, 401 4 . 

 Graphite, 295 4 , 295 s , 29G 3 . 

 Grasse river, 439 1 . 

 Grenville rocks, 295 4 -99 3 , 435 3 . 



Harpes sp., 366 9 . 



antiquatus, 366 2 . 



ottawaensis, 366 2 . 

 Helderberg submergence, 386 2 . 

 Hematite, 348 6 , 348 7 , 352°, 352 7 35G 7 , 

 395 7 . 



Hornblende, 29G 5 . 300 2 , 300 s , 301 1 , 

 304 9 , 309 7 , 309 s , 309 9 , 310 1 , 311 4 , 

 313 3 , 314 1 , 314 9 , 315 s . 319 4 , 323*, 

 32G 7 , 328 9 , 329 s , 330 7 , 334 4 , 335 s , 

 33G 4 , 337 5 , 33T 7 , 34S 6 , 352 s , 39G 2 , 

 39G 7 . 



Hoskins, L. M., cited, 401 9 . 

 Hudson river, 439 s , 441*. 

 Hyperite, 330 7 ; analyses, S32 6 , 353 4 . 

 Hypersthene, 300 7 , 304 5 , 305 2 , 309 7 , 



309 9 , 312 9 , 313 5 , 313«, 313 9 , 319 4 , 



32S 3 , 329 s . 



Igneous activity, 287 7 -88 5 . 



Igneous intrusions, 275 4 . 



Igneous rocks. 274 1 ; foliation, 400 7 ; 

 paleozoic, 394*-99 4 ; late Precam- 

 bric, 345 5 -54 2 ; of the upper Mo- 

 hawk region, 397 s -98 5 . 



