INDEX TO GEOLOGY OF THE NORTH CREEK QUADRANGLE 



89 



Muscovite, 12, 38 



Natural Bridge, 10, 11 



Newland, David H., cited, 7, 8 



Norite, 29 



North Creek, 5, 11, 62, 85 



North Creek fault and branch, 54 



North Creek glacial lake, 'j'^ 



North Hudson, 72 



North River village, 44, 55 



Northville, 21 



Obsidian, 39 



Ogilvie, cited, 65 



Olivine, 29, 30, 31 



Olivine norite, 29 



Orthoclase, 13, 14, 17, 18, 19, 22, 28, 



29, ZZ, Z7, 38 

 Oven mountain, 12, 46, 55, 59, 61, 78, 

 81 ; faults, 54 



Paleozoic outliers, 44-45 



Paradox lake, 'j2 



Patterson brook, 6 



Pegmatite, 7, 38 



Pegmatite dikes, 'j'j 



Peneplains, 64-65 



Phlogopite, 12, 14 



Pine mountain, 12, 56 



Pine-Gage mountain mass, 61, 65 



Plagioclase, 13, 17, 18, 19, 22, 28, 29, 



ZZ, Z7, 40, 41, 42, 44 

 Porphyry, 19, 21-22, 58, 76, 84, 85 

 Porphyry gneiss, 23 

 Port Leyden quadrangle, 20 

 Postglacial drainage changes, 75 

 Potash mountain, 63 

 Potsdam sandstone, 44, 45, 77 

 Potter brook, 74 

 Potter mountain, 6, 18, 38, 46, 50, 61, 



•63, 70 

 Potter-Birch-Heath mountain faults, 



50 

 Pottersville, 5, 9, 12, 18, 22, 38, 59, 62, 



72, 82, 84, 85 

 Pottersville glacial lake, 70 

 Prospect mountain, 6, 13, 22, 23, 46, 



53, 63, 69 

 Pyrite, 12, 17, 29, 30, 2>Z, 2>7, 39, 40, 



41, 42 

 Pyroxene, 11, 12, 14, 17, 18, 25, 28, 58 



Pyroxene gneisses, 14, 25, 60 

 Pyroxene syenite, I/-18 



Quartz, 11, 12, 14, 17, 18, 19, 20, 21, 



22, 28, 29, 30, Z7, 40, 41, 58 

 Quartz syenite, 16-18 

 Quartzite, 12, 14, 15, 16 



Riverside, 18, 20, 84 

 Road metal, 84 



Schroon lake, 7, 74; faults, 56 

 Schroon Lake village, 44, 72 

 Schroon river, 6, 70, 72, 75 

 Serpentine limestone, ii 

 Serpentine marble, 43 

 Sillimanite-feldspar-garnet gneisses, 



14 

 Sillimanite gneiss, 15 

 Smith pond, 74 

 Smyth, C. H., cited, 28 

 Sodom, 9, 12 



South Horicon, 14, 26, 69, 72 

 Starbuckville, 14, 59, 62, 72 

 Steiger, George, analyses by, 34 

 Stockton mountain, 6, 25, 54, 58, 63, 



67 

 Stony Creek gorge, 70 

 Structural features, 45-61 

 Sullivan pond, 47, 52 

 Syenite, 16-18, 25, 29, 38, 58, 76; as 



road metal, 84; as building stone, 



85 

 Syenite gneiss, 23, 26 

 Syenite-granite, 7, 60-61 



Theresa formation, 44 



Thirteenth lake, 79 



Thurman, 9, 11, 14, 16, 50, 59, 60, 61, 



63, 67, 83, 85 

 Till, 69 



Titanite, 11, 17, 29, 30 

 Topography, 6-8, 61-65; relation to 



rock character, 61-62; relation to 



rock structures, 62 

 Tourmalin, 38 

 Trap rock, 84 

 Tremolite, 11, 12 

 Tripp mountain, 6z\ faults, 52 

 Tripp pond, 61, 69. 74; fault, 52 

 Trout brook, 70, 83 

 Tug Hill, 65 



