﻿INDEX TO GEOLOGY OF THOUSAND ISLANDS REGION 



193 



Ribbed limestone, 167-69. 



Rideau, Ont, 61. 



Road metal, 173-74. 



Roaring creek, 77. 



Robbins island, granite, 11, 41. 



Rock cliffs of region, 22. 



Rock knobs, 146-47. 



Rock structures, 99-121. 



Rocks, 24-92. 



Rossie road, 57. 



Ruedemann, R., Mohawkian series, 

 79-92; mapping of quadrangles, 5, 

 115, 121; cited, 65, 134, 135. 



Rutile, 32, 181. 



St Lawrence county, beeches and 

 deltas of Lake Iroquois, 139. 



St Lawrence valley, 126. 



Salisbury, R. D., cited, 156. 



Sandstone quarries, 174-75. 



Sanford Center, 80. 



Sanford Corners, 75, 76, 154, 160. 



Saranac gneiss, 38. 



Saratoga vicinity, Paleozoic oscilla- 

 tions of level, 97. 



Saratogan, 97. 



Scapolite, 51, 53. 



Scarps, 129-31. 



Schists, 30, 31, 34-36, 37, 50, 55, 571 

 green, in Alexandria, 47-50. 



Seely, cited, 68. 



Serpentine, 29. 



Seven foot tier, 79, 84, 85, 86, 87, 89, 

 90, 92. 



Sillimanite, 35. 



Sixberry lake, 127, 132. 



Smyth, C. H. jr, mapped major por- 

 tion of Wellesley island, 5 ; report 

 on Alexandria and Grindstone 

 sheets, 6; cited, 27, 31, 36, 40, 45, 

 50, 51, 54, 57, 62, 119, 182, 183. 



Stock, denned, 10. 



Stone Mills, 71. 



Stone quarries, 173. 



Stones River limestone, 17-18, 78, 95. 



Striations, 159-60. 



Stromatocerium, 80. 



Strophomena filitexta, 90. 



Strough, 155. 



Subsequent streams, 124. 



Syenites, 24, 39, 44; analyses, 182-84; 

 southwest of Theresa, 11. See also 

 Alexandria syenite; Theresa syen- 

 ite. 



Syncline, denned, 113. 



Talc, 53. 



Taylor, F. B., cited, 166. 



Terraces, 129-31. 



Tertiary drainage, 125-29. . 



Tertiary uplift, 125. 



Tetradium cellulosum, 80, 81, 82, 83, 

 84, 90. 

 syringoporoides, 72, 84. 



Theresa, 52, 57, 58, 59, 98, 113, 128, 

 155, 160, 173. 



Theresa formation, 15-16, 54, 60, 64- 

 68, 92, 97, 98, 114, 115, 130, 133, 147; 

 age of, 66-68; composed of two 

 unconformable formations, 16; in 

 part of Ozarkic and in part of 

 Tribes Hill age, 65; term to be 

 restricted, 66; uplift following, 16; 



Theresa Junction, 155. 



Theresa quadrangle, 7 ; mapping, 5 ; 

 Potsdam sandstone, 60, 62. 



Theresa syenite, 38, 182; foliation, 

 102-3. 



Threemile Bay, 89, 91, 92, 114, 115. 



Till, 151; old, 166. 



Titanite, 32, 35, 36, 38, 40, 49, 52, 64, 

 177, 181, 183. 



Topography, 121-36, 145-50. 



Tourmalin, 46, 48, 49, 50, 181 ; con- 

 tact zones in Alexandria, 50-51. 



Trap rock dikes, 24, 44, 174. 



Tremolite, 53. 



Trenton Falls, Paleozoic oscillations 

 of level, 97. 



Trenton group, 79; 97. 



Trenton limestone, 18-20, 22, 54, 90- 

 92, 96, 97, 98, 121, 123, 130; use for 

 road metal, 174. 



Tribes Hill limestone, 16, 64-68, 93, 



97- 

 Tupper syenite, analysis, 182. 



Ulrich, E. O., field work, 6 ; acknowl- 

 edgments to, 6; cited, 65, 72, 74, 75, 

 7^>, 78, 79, 82, 85, 93, 95, 136; men- 

 tioned, 86. 



