94 



NEW YORK STATE MUSEUM 



Gneisses, blacii hornblende, 20^ ; con- 

 taining garnets, 11^ ; gray, 23* ; 

 greenish, 21", 23'' ; greenish gray, 

 20'; igneous, 88^-89°; red, 2(F; 

 syenite, 20'-21\ 



Granite gneisses, 881 



Grapliite, 18', 86^ 87^ 88^ 



Gravel, 83^. 



Grenville rocks, 17^-19^ 21', 28^ 85«- 

 88' ; igneous rocks associated with, 

 19'-20^ 



Hall, James, cited, 25"*. 

 Hornblende, 15^ 18% 20«, 21% 22\ 22*, 



m\ 89*, 90^, 90% %V, 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, 6(h% 60». 



leaf 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=*, 3r; 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% 92S 92*. 

 Malachite, 26% 

 Manheim 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% 



Middlevllle outliers, 15'-19% 

 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= ; petrogi-aphy, 85^-92% 



Prosser, O. 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% 



Bies, 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% 



