5i° 



NEW YORK STATE MUSEUM 



Hobbs, W. H., cited, 493. 



Hornblende, in anorthosite, 471 ; in 

 border gabbro, 474; in Grampus 

 gneiss, 468; in granite, 482, 510, 

 511; in Grenville rocks, 461; in 

 Long Lake gneiss, 464, 465 ; in 

 syenite, 477, 512, 515, 516, 518, 520. 



521, 522, 523, 524. 



Hornblende-andesin rocks, 527. 



Hyperite, 465. 



Hypersthene, in anorthosite, 471 ; in 



granite, 511; in Grenville rocks, 



527; in syenite, 512. 



Igneous intrusions, 455. 

 Igneous rocks, 454 ; later, 456 ; petrog- 

 raphy, 510-27. 



Jenkins pond, 452. 

 Joints, 485-88. 



Kemp, J. T., cited, 460, 468, 474, 489, 

 455, 502, 503. 



Labradorite, in Grampus gneiss, 468. 



Lake Sanford, titaniferous ores, 502. 



Lakes, number in Long Lake quad- 

 rangle, 452 ; in St Regis quadrangle, j 

 497- 



Little Falls syenite, 518. 



Long Lake gneiss, 463-67. 



Long Lake quadrangle, situation and 

 character, 451-53; general geology, 

 453-59. 



Magnetite, in anorthosite, 471, 475 ; 

 in border gabbro, 474; in Grampus 

 gneiss, 468; in granite, 510, 511; in 

 Grenville rocks, 509, 526, 527; in 

 syenite, 477, 512, 513, 515, 516, 518, 

 520, 522, 523, 524. 



Meade, A. P. jr, acknowledgments to, 

 451- 



Mica, in Grenville rocks, 461, 504, 

 508 ; in Long Lake gneiss, 464, 465. 



Microperthite, in granite, 510; i" 

 syenite, 477, 515, 516, 520, 522, 523, 



524- 

 Monzonite, 477. 

 Moose creek belt, 459. 



Moraines, 496. 

 Morley, E. W., cited, 505. 

 Morris granite, 482 ; analysis, 525 ; 

 petrography, 510. 



Ogilvie, I. H., cited, 467, 491, 495. 

 Ophicalcite, in Grenville rocks, 461. 



Paleozoic submergence, 456-57. 

 Pegmatite of Piercefield gneiss, 469. 

 Peneplains, 491-92. 

 Petrography of the rocks, 503-27. 

 Phlogopite mica, in Grenville rocks, 



461, 504, 507, 508. 

 Pickerel pond, 452. 

 Pickwacket pond, 452. 

 Piercefield gneiss, 463, 469-70. 

 Pitted plains, 497-98. 

 Precambric rocks, four great groups, 



453- 



Pyrite, in syenite, 512, 513, 516, 518. 



Pyroxene, analysis, 504; in border 

 gabbro, 474; in Grampus gneiss, 

 468; in Grenville rocks, 461, 504, 

 505, 506, 508, 509, 510; in Long 

 Lake gneiss, 465 ; in Piercefield 

 gneiss, 470; in syenite, 477, 518, 520. 



Quartz, in granite, 482, 510; in 

 Grampus gneiss, 468; in Grenville 

 rocks, 504, 50s, 506, 507, 508, 509, 

 526; in Long Lake gneiss, 464; in 

 syenite, 477, 478, 512, 515, 516, 518, 

 520, 522, 523, 524. 



Quartz gneisses, 460. 



Quartz-pyroxene gneiss, chemical 

 composition, 506. 



Quartz syenite, 525. 



Raquette river, 452, 499. 

 Road metal, 503. 

 Rock pond belt, 459. 

 Rock structures, 484-90. 



St Regis quadrangle, number ol 



lakes, 497. 

 Santanoni quadrangle, 474, 492. 

 Saussurite in anorthosite, 472, 475. 

 Scapolite in anorthosite, 476. 

 Seward pond, 452. 



