96 



NEW YORK STATE MUSEUM 



Northville, 66, 68 

 Number Four, "j^i 



Oligoclase, 84 

 Oneida county, 46, 48 

 Ordovician period, 46-49 

 Orthoclase, 39, 84 

 Oswegatchie river, 25 ; course, 26 



Paleozoic history, 43-50 



Paleozoic strata, 51, 52 



Panther mountain, 21 



Paradox lake, 63, 66 



Pegmatite, 42 



Peneplain, 11, 44, 50 



Phlogopite, 86 



Physical history of the Adirondacks, 



31-73 

 Piseco lake, 22, 29, 30, 63, 64 

 Plagioclase, 42, 43, 84 

 " Plains of Abraham," ']^ 

 Plutonic rocks, 9, 2f7^ 39. 4°, 42 

 Porphyry, 39 

 Port Henry, 78, 79, 80 

 Potsdam sandstone, 44, 46, 62, 71 

 Potsdam sea, 44 

 Pownal, Thomas, cited, 75 

 Prepaleozoic history, 31-43 

 Pyrite, 86 



Pyroxene, 34, 37, 39, 42, 43, 86 

 Pyrrhotite, 87 



Quarries, 78-80 

 Quartz, 34, 39, 42, 46, 87 

 Quartzite, 10, 34 

 Quaternary period, 57 



Rand Hill, 38 

 Raquette falls, 26, 70, 71 

 Raquette lake, 22, 26, 27, 28, 64, 70 

 Raquette river, 25, 70; course, 26 

 Red Horse chain of lakes, 26 

 Redfield, Mt, 21 

 Rivers, 23-26 

 Rock lake, 22 

 Rock river, 70 

 Rogers mine, 80 



Sacandaga lake, 29, 64 

 Sacandaga river, 23, 24, 66, 68; 

 course, 24 ; valley of, 23 



Saddleback mountain, 21 



St Lawrence channels, "^2 



St Lawrence river, 25, 2(i, 70 



St Lawrence valley, 18, 2^^, 25, 2^, 31, 



44, 49, 55, 58, 60, (i2 

 St Regis lakes, 27 

 St Regis quadrangle, 27, 63 

 St Regis river, 25 

 Salmon river, 25 

 Salt, 10 

 Sand, 34 

 Sandstone, 9, 10, 18, 19, 20, 23, 33, 



34, 46 

 Santanoni mountain, 21 

 Santanoni quadrangle, 16, 23, 63 

 Saranac lakes, 22, 27, 28, 64 

 Saranac lakes valley, 66, 71 

 Saranac river, 22, 25 ; course, 25 

 Saratoga county, 35, 66 

 Saratoga Springs, 68 

 Schenectady shales and limestones, 48 

 Schists, 10, 34 



Schroon lake, 32, 2^, 30, 46, 56, dz, 66 

 Schroon Lake quadrangle, 23 

 Schroon Lake village, 62' 

 Schroon river, 24, 68 

 Sea weeds, z(i 

 Sedimentary rocks, 9, 10 

 Sentinel range, 37, 61 

 Serpentine, ^^-j 

 Settlers, 75-78 

 Seward mountain, 21 

 Shale, 9, 10, 19, 20, 2i2>^ 47 

 Silurian period, 49 

 Silurian sea, 49 



Sixmile-Fishing Brook Valley, 71 

 Skylight, Mt, 21, 63 

 Smith, Gerrit, T] 

 Smith's lake, "jd 

 Smyth, Charles H., cited, 8 

 Snowy mountain, 21 

 Squaw Brook valley, 23 

 Starfishes, 48 

 Stillwater, 76 

 Stoddard, S. R., cited, 78 

 Stone quarries, 80 

 Stony Creek gorge, 68 

 Stony Creek station, 23, 24, 68 

 Strata, 9 

 Streams, 23-26 

 Susquehanna river, 57 



