5o8 



NEW YORK STATE MUSEUM 



Labradorite, 494^, 495^, 498^, 498^, 

 4985, 4^89, 499"^ 499^ 500^ 500^, 

 50i3. 



Lawson, A. C, cited, 501^. 



Limestone, 479^, 479''. 



Limonite, 504'^. 



Lower base-level, age of, 469*. 



Magnetite, 494I, 494^ 495*, 496^ 4969, 

 498^, 498^, 504^; nontitaniferous, 

 505^-6'^; titaniferous, 499"^, 500^, 501^, 

 501^ 5055. 



Mica schist, 4792, 4899-81'^. 



Microcline, 494^, 494^, 4948, 4958, 

 496^ 497^ 



Microperthite, 495"^, 496^, 496^, 497*, 

 497^ 4978, 4981, 498^. 



Muscovite, 496". 



Newland, D. H., work on the geol- 

 ogy of the Adirondacks, 463^. 

 Norites, 500^. 



Oligoclase, 4952, 497*. 

 Orthoclase, 494^, 494^, 496*^, 496®, 497*, 

 498^. 



Paleozoic formations, 490^-915. 



Paradox Lake quadrangle, location 

 and topography, 464''-65'*; physiog- 

 raphy and glaciology, 465^-78*. 



Pegmatites, 487^-89^, 493^. 



Peneplains, 468^ 



Petrography, 492^-503^; of sedimen- 

 tary rocks, 4938-959; of igneous 

 rocks, 4959-5019. 



Pharaoh lake, 477^. 



Physiography of the Paradox Lake 

 quadrangle, 465^-78*. 



Piedmontite, 494^ 494^, 494^. 



Plagioclase, 4942, 4948, 496^, 496^, 

 4985, 499*. 



Porphyritic gneiss, 4968. 



Potsdam sandstone, 466^, 478^, 490^. 



Preglacial erosion history, summary 

 of, 468^-69* . 



Putnam creek valley, 4668. 



Pyrite, 4956, 4959, 5045. 



Pyroxene, 496*^, 4979, 4996, 5013^ 

 501^. 



Quartz, 494I, 494^, 4946, 4948^ 4949^ 



495^ 495^ 495^ 496^ 496^ 497^ 

 4974, 4977, 4979, 498I, 4982. 

 Quartzite, graphitic, 479^; shaly, 479^, 



483^ 

 Quartzose gneiss, summary and con- 

 clusions, 502^-35. 



Rutile, 4959. 



Saussurite, 494'^ 

 Schroon valley, 466^, 477^. 

 Sedimentary rocks, petrography of, 



493^-95^- 

 Shaly quartzite, 4832, 

 Shear zones, 492^. 



Sherman Corners, valley near, 4668. 

 Sillimanite gneiss, 479^, 48i'^-83^; 



description, 495^. 

 Smyth, C. H. jr, work on the geology 



of the Adirondacks, 463^; men- 

 tioned, 483'^; cited, 484^. 

 Spinel, 4988. 

 Stratigraphic relations, summary of, 



483^. 

 Syenite, 484^-85^ 493^ 495^ 503^; 



description, 497^-98^; summary and 



conclusions, 502'-3-''. 



Ticonderoga, 472^-771, 

 Titaniferous iron ores, 500^^. 

 Titaniferous magnetite, 499"^, Soo^, 



50i3, 5oi7, 5055. 

 Titanite, 498*, 500^. 

 Topography of the Paradox Lake 



quadrangle, 464^-65*. 

 Towner pond, 472^, 

 Trap, 493^. 

 Trap dikes, 4898. 

 Trenton limestone, 4999-915. 

 Trout brook valley, 466'^, 476''. 



Van Hise, cited, 4888. 



Weinschenk, Ernst, cited, 504^. 

 Whortleberry pond, 477^. 

 Williams, E. H., cited. 4888. 

 Williams, G. H., cited, 498^^, 501^. 

 Wolf pond, 4772. 



Zeolites, 494^, 496"^. 



Zircon, 495^,495^ 496^, 4982, 4988, 



