50 



NEW YORK STATE MUSEUM 



Graphite, lo, ii. 

 Gravel, zj8. 



Gravesville, 20, 22, 27, 28, 31. 

 Gray, 43. 



Grenville rocks, 6, 9; foliated struc- 

 ture, 29. 



Hare brook, 48. 

 Hawkinsville, 41. 

 High fall, 20, 27, 30. 

 Hinckley, 20, 42, 43, 45, 46. 

 Holland Patent, 20, 23, 24, 46, 47. 

 Honnedaga, 20, 22. 

 Hornblende, 10, 11, 12, 13, 15. 

 Hypersthene, 11. 



Ice erosion, 40. 



Ice movement, direction of, 40-41. 



Ilion, S3. 



Iron ore, 48. 



Joints, 28-29. 



Kame-morainic deposits, 42-43. 



Labradorite, 11, 15, 48. 

 Leperditia fabulites, 20. 

 Little Black creek, 9, 12, 14, 15, 34, 



37- 



Little Falls, 16, 39. 



Little Falls district, 37, 42; lime- 

 stone boulders, 10; type section, 

 38. 



Little Falls dolomite, 16. 



Little Falls fault, 23. 



Little Falls quadrangle, 29. 



Little Woodhull creek, 9. 



Logan, Sir William, cited, 30, 32. 



Long Lake quadrangle, 29. 



Lorraine beds, 22; thickness, 22. 



Lowville limestones, 7, 16, 17, 34, 39; 

 thickness, 16; building stone, 47. 



Lowville shales, 38. 



Magnetite, 11, 12, 13, 15, 48. 

 Meekerville, 12, 47. 

 Mica, see Biotite mica. 

 Microcline, 13. 



Microperthite, 12, 13, 14. 



Middleville, 46. 



Mill creek, 20, 22, 27, 31. 



Mohawk valley, 41. 



Monticulipora (Prasopora) lycoper- 



don, 19, 20. 

 Murchisonia gracilis, 20. 

 Myers hill, 14, 35-36, 44. 



Newland, D. H., cited, 10. 

 Newport, 17. 



Nine Mile creek, 21, 23, 46. 

 North Wilmurt, 12. 

 Northwood, 12, 36, 37, 43. 



Oligoclase, 11, 13, 15, 48. 

 Oriskany, 46. 



Orthis (Platystrophia) biforata, 19, 

 20. 

 (Dalmanella) testudinaria, 19, 20. 

 Orthoceras sp., 20. 

 Orton, Edward, cited, 33. 

 Oswego county, 33. 



Paleozoic rocks, 16-22 ; overlap on 

 Precambric, 33-35. 



Pamelia formation, 16. 



Pegmatite, 15. 



Penn mountain, 22. 



Plagioclase, 11, 12, 13, 14. 



Platystrophia biforata, see Orthis 

 (Platystrophia) biforata. 



Plectambonites sericeus, 19, 20. 



Poland, 16, 17, 46. 



Port Leyden district, 42. 



Port Leyden quadrangle, 16. 



Potsdam sandstone, 7, 16, 33. 



Prasopora lycoperdon, see Monticu- 

 lipora (Prasopora) lycoperdon. 



Precambic rocks, 9-15; undetermined 

 areas, 15. 



Precambric surface, 35-37. 



Prospect, 20, 23, 24, 30, 31, 32, 41, 42, 

 45, 46, 47 ; fault near, 26. 



Prospect falls, 25. 



Prosser, C. S., cited, 17, 18, 19, 20, 

 27, 30, 33- 



Pyrite, 11. 



Quartz, 10, 11, 12, 13, 14, 15, 48. 



