164 



NEW YORK STATE MUSEUM 



Chateaugay river, 88 7 -89 4 . 



Olarke, J. M., investigations of 

 Portage fauna, 6 3 , 6 9 ; investiga- 

 tions of Oriskany fauna of Be- 

 craft mountain, 6 9 . 



Clinton limestone, illus. facing p. 

 70. 



Clinton shales, exposures, 66 2 , 67 3 , 

 67 s ; thickness, 67 9 . 



Coccolite, 155 8 . 



Conglomerates, 13 2 , 18 9 -21 8 ; ex- 

 posures, 18 8 , 20\ 



Corals, fossil, generic characters. 

 6 s . 



Cosgriff trap rock quarry, 29 9 . 



Crystalline limestones, see Lime- 

 stones. 



Crystalline rocks of Adirondacks, 

 5 4 , 73-135; of Franklin county, 

 89 5 -123\ 



Cushing, H. P., Preliminary report 

 on the geology of Franklin 

 county, 5 4 , 73-128; cited, 95 8 , 105 3 , 

 109 2 , 123 2 , 123 6 , 135 5 . 



Darton, N. EL, cited, 24 8 , 34 2 , 41°, 

 53 4 , 63 9 , 65 9 , 67 9 , 68 7 , 146 6 . 



Deer river, 88 7 -89 4 . 



Deltas of Warren county, 161 9 . 



Diabase, 22*, 117*-19 3 , 127 6 . See 

 also Trap rock. 



Dictyospongidae, memoir on, 6 7 . 



Dikes, in anorthosite, 102 3 , 117"; 

 diabase, 118 2 -19 3 ; of Franklin 

 county, tabulation, 120-22; gab- 

 bro-diorite, 91 s ; gabbros, 109 7 , 

 HO 6 , 114 4 ; in Newark rocks, 42 6 - 

 43 2 ; of Siluric age, 123 2 ; syenite, 

 117 s ; syenite porphyry, 118 s ; trap, 

 143 9 , 144 T . 



Diorite, 91 s , 98 s . 



Dolomite, 123 5 , 148*. 



Drainage of Adirondacks, 83 x -89 4 . 



Economic geology of Franklin 

 county, 125 2 -28 3 T 



Emmons, Ebenezer, cited, 125°, 



146 3 . 

 Esopus shale, exposures, 55 8 , Gl 8 , 



65 a , 72 3 ; thickness, 65 9 . 



Faults in Newark rocks, 44 s -49 2 . 



Feldspar, 96 s , 97 2 , 97 4 , 97 s , 100 1 , 103 s , 

 107 1 , 107 3 , 107 6 , 107 s , 111 6 , 112 2 , 

 112 3 , 113 3 , 114 1 , 114 3 * 115 4 , 115°, 

 117 3 , 119 1 , 142 2 , 145 2 , 157 4 . See 

 also Andesin feldspar; Labrador- 

 ite; Orthoclase feldspars; Plagio- 

 clase feldspars. 



Feldspathic sandstone, 154 7 . 



Fort Ann, topography and geology, 

 162 1 ; geologic map, facing p. 162. 



Fossils, in Helderbergs, 53-72; in 

 Trenton limestone, 149 1 -50 3 ; in 

 Utica slate, 151 1 . 



Franklin county geology, report of 

 H. P. Cushing, 5 6 , 73-128; geologic 

 map, in back cover. 



Furnace mountain, illus. facing p. 

 80. 



G-abbro-diorites, 98 8 . 



Gabbroic gneisses, 94 2 , 94 4 , 104 3 . 



Gabbros, anorthosite, 102 9 -3\ 114 s , 

 126 s ; hypothetic gabbro core of 

 Adirondacks, 133 s ; represented 

 on Geologic map, 132 s ; of Frank- 

 lin county, 109 5 -14 9 , 99 2 , 99°, 101 4 , 

 101 8 , 102 2 , 102 9 , 106 7 , 107 4 , 103 3 , 

 115 7 , 116 3 , 126 s , 127 6 ; of Hamilton 

 county, 143 3 , 145 3 , 152 7 ; of War- 

 ren county, 158 s , 161 2 ; of Wash- 

 ington county, 162 5 . 



Gallupville, sections near, 62'-63 7 . 



Garnet, 94 1 , 100 5 , 102 2 , 103 s , 107 3 , 

 HO 9 , 111 7 , 112 3 , 113 3 , 114 7 , 115 7 , 

 118\ 144 3 , 144 5 ; mines, 160 4 . 



Geologic map, completion, 5 3 ; color- 

 ation, 6 7 ; progress in mapping 

 crystalline rocks of Adirondacks, 

 129-35. 



