94 



NEW YORK STATE MUSEUM 



Gneisses, black hornblende, 20^ ; con- 

 taining garnets, 22'; gray, 23^; 

 greenish, 2r, 23*; greenish gray, 

 20*; igneous, SS^-SO"; red, 2^\ 

 syenite, 20'-21\ 



Granite gneisses, 88^. 



Graphite, 18«, 86», 87^, 88^ 



Gravel, 83^ 



Grenville rocks, 1T-1Q\ 21^ 28», 85«- 

 88* ; igneous rocks associated with, 

 19«-20». 



Hall, James, cited, 25^ 

 Hornblende, 15^ 18% 20«, 21», 22S 22», 



89\ 89% 9CP, 90% 91% 92% 92». 

 Hypersthene, 89*, 91% 



Igneous action, 5*-12^. 

 Igneous gneisses, 88*-89% 

 Igneous rocks, associated with the 

 Grenville, 19«-20% 



Joints, 7% 48^-51% 



Kayser, A. O., brick manufacture, 



83% 

 Kemp, J. F., cited, 60^, 60«. 



Xeaf gneisses, 19% 20*. 



Leperditia, 29% 



Lime, 88% 



Little Falls fault, 13% 38% 38«-43% 



Little Falls outlier, 15^-19% 



Lorraine shales, 35% 



Lowville limestone, 10=, 27% 29*, 29*- 

 30*, 31*; thickness, 30^; use as 

 building stone, 81^-82*; use for 

 road metal, 82% 83% 



Magnesia, 88*. 



Magnetite, 15% 18% 23% 86% 87% 88% 



89% 90^, 90% 91% 92% 92% 

 Malachite, 26% 

 Manheun fault, 38% 

 Marcasite, 28% 34% 45% 

 Mica, black, 15% 18% 20*, 21% 22% 23% 



84% 86% 86% 87*, 87% 89% 89% 90^, 



90% 90% 92% 92% 



Middleville outliers, 15^9% 

 Monzonite, 22% 

 Moraines, 75% 



Orthoceras, 34*. 



Orton, Edward, cited, 53% 55% 55% 

 Overlap on pre-Cambrian floor, 51^- 

 56*. 



Paleozoic, some oscillations of level 

 during, 51*-65*. 



Paleozoic rocks, 24^-35^; joints, 50^- 

 51* ; present surface, 68^-71% 



Pegmatite, 22*. 



Petrography of the pre-Cambrian 

 rocks, 85*-92«. 



Physical changes, sketch of, 5^-15% 



Pleistocene deposits, 73^-81% 



Pleonaste, 86% 



Porphyrite feldspar, 21% 



Porphyritic rocks, 16% 22^-23% _ 



Potsdam sandstone, 9*, 24^-25*. 



Pre-Cambrian floor, 66*-68*; charac- 

 ter and slope, 59^-62-; paleozoic 

 overlap on, 51^-56*. 



Pre-Cambrian rocks, 15^-24^; joints, 

 48*-50^; northeast of Little Falls, 

 23*-24^ ; petrography, 85*-92% 



Prosser, C. S., cited, 25% 27% 30% 33% 

 34% 39% 53% 54*, 62% 



Pyrite, 27% 28% 28% 34% 45% 87% 87% 

 89% 



Pyroxene, 15% 20*, 21*, 22% 22*, 23% 



Pyroxene gneisses, 89% 



Quartz, 15% 18% 18% 22% 23% 26% 28% 

 28% 86% 88*, 90% 91% 91% 91% 92«. 



Ries, H., cited, 83% 

 Road metal, 82*-83% 

 Ruedemann, R., cited, 65% 



Salisbury iron mine, 83*-85*; rocks, 



90*-92% 

 Sand, 75«-77% 83% 

 Sea level, length of time district has 



been above, 13% 



