INDEX TO PORT LEYDEN QUADRANGLE 



6l 



Parish, 21, Z7- 



Park hill, 52. 



Partridgeville, 13, 14, 17, 41. 



Pentacrinites hamptonii, 33. 



Plagioclase, 12, 14, 16, 20, 21. 



Pleistocene geology, 44"'4^- 



Port Leyden, 18, 19, 20, 21, 22, 27, 

 29, 31, 34, 35, 41, 42, 43, 45, 52, 55, 

 58.' 



Potsdam sandstone, 7, 21, 37, 39. 



Precambric rocks, 9-21 ; undeterm- 

 ined, 21 ; erosion, 46. 



Precambric surface, 39-44; slope 

 where now exposed, 40-41 ; slope 

 where Paleozoics now cover, 41- 

 42 ; slope during Paleozoic deposi- 

 tion, 42-44. 



Prosser, cited, 30, 34, 41. 



Pulaski, 21, 42. 



Pulaski shale, 33. 



Pyrite, 11, 20, 34, 58. 



Pyroxene, 12, 15, 20, 



Pyroxene gneisses, 12. 



Quartz, 11, 12, 14, 16, 17, 20, 21, 58. 

 Quartz-hornblende syenite, 13. 



Remsen, 31, 32, 42, 50. 



Rem.sen quadrangle, 42, 43, 50, 51, 



52, 54; bulletin, 30; Precambric 



altitudes, 41. 

 Rideau sandstone, 22. 

 Ripple marks, 36. 

 Road materials, 57. 

 Roaring brook, 9, 22, 26, 30, 31, 45, 



55- 

 Rome, 21, 34, 54. 



Sand pond, 51. 



Sands, 7, 57. 



Sedimentaries, erosion, 47-51. 



Shuetown, 10. 



Sillimanite, 11, 20, 58. 



Slope of Precambric surface, where 

 now exposed, 40-41 ; where Paleo- 

 zoics now cover, 41-42 ; during 

 Paleozoic deposition, 42-44. 



Smyth, cited, 10. 12, 14, 15, 17; men- 

 tioned, 40. 



Soils, 56. 



Speiry hill, 52. 



Stillwater, 21, 31," 32, 34, 35, 37, 39, 



43- 

 Structural geology, 34-37. 

 Structure sections, 37, 38. 

 Sugar river, 9, 28, 30, 31, 36. 

 Surface of the Precambric rocks, 



39-44. 



Syenite, 12, 57, 58. 

 Syenite gneiss, 12-15. 

 Syenite-Grenville mixed gneisses, 

 18-21. 



Talcottville, 30, 52, 57. 



Tetradium, 23, 25, 26. 



Theresa quadrangle, 22. 



Topography, 8-9. 



Trenton Falls, 28, 29, 30, 54. 



Trenton limestone, 7, 28-31, 34-35, 



36, 39, 43, 45, 57, 58; thickness, 



31 ; ripple marks, 36. 

 Triarthrus becki, 32, 33. 

 Tug hill, 8, 31, 33, 34, 47, 49, 5o, 53, 



55- 

 Tupper Lake syenite, 18. 

 Turin, 30, 32, 33, 52, 57. 



Ulrich, cited, 22, 26. 

 Undetermined Precambric areas, 21. 

 Utica, 2ij 41. 



Utica shales, 7, 31-32, 47, 55; thick- 

 ness, 32. 



Vanuxem, cited, 25, 32, 33, 34. 

 Vernon, 34. 



Walcott, cited, 33. 



Watertown, 54. 



West Canada creek, 50, 54. 



Whetstone creek, 9, 55. 



Whetstone gulf, 33, 50. 



W"hitaker's gulf, 30. 



Wilmurt quadrangle Precambric 



altitudes, 41. 

 Woodhull lake, 41. 



Zircon, 11, 14, 17, 20, 21, 58. 

 Zoisite, 14. 



