INDEX 



Adirondack village, 5, 14, 41 



Alder brook fault, 80 



Anorthosite, dikes of syenite and 

 granite in, 28 ; broad intrusive 

 tongues of syenite and granite in, 

 29; inclusions of, in syenite-granite, 

 30; origin of, by differentiation in 

 a laccolith of gabbroid magma, 34 



Anorthosite , and syenite-granite 

 mixed rocks, 51 



Anorthosite area, absence of Gren- 

 ville and syenite-granite from, 32 



Anorthosite series, 16-38, 74 



Aplite dikes, 59 



Bailey hill, 6, 20, 46, 49, 50 



Bailey pond, 41, 42, 46, 48, 49, 52, 55 



Barnes pond, 6 



Beech hill, 6, 29 



Beech hill anorthosite, 31 



Bigsby hill, 19, 20, 42 



Black River (Lowville) limestone, 



68 



Blue Ridge mountain, 23 

 Blue Ridge village, 5, 6, 17, 21 

 Boreas river, 6, 16, 19, 22, 29, 39, 83 

 Boreas river fault, 82 

 Bowen, Dr N. L., cited, 16, 32 

 Branch brook, 23 

 Building stone, 99 



Calahan pond, 12, 39, 43 



Canajoharie (Trenton) shale, 6C 



Catamount hill area, 14, 61 



Cenozoic history, 95 



Charley hill, 39, 44 



Cheney pond, 6 



Cheney pond stock, 56 



Clarke, F. W., cited, 36 



Clear Pond mountain, 22 



Cobble hill, 6, 19, 31, 41, 42, 46, 52, 



59 



Gushing, H. P., cited, 8, 16, 27, 28, 

 66 



Daly, cited, 34, 36 



Diabase, 76; thin section of, table, 



55 



Diabase dikes, 61 

 Dikes of syenite and granite in 



anorthosite, 28 



Kmmons, E., cited, 8 

 Erratics, 87 

 Eskers, 88 



Falls brook, 12 



Faults and zones of excessive joint- 

 ing, 77 



Finlay, G. L, cited, 8 

 Foliation of intrusive rocks, 74 

 Fuller brook fault, 80 



Gabbro, 76; thin section of, table, 55 



Gabbro and Metagabbro, 53 



Garnet, 97 



Geologic features, 7-9 



Geological history, summary, 93 



Glacial boulders, 87 



Glacial deposits, 86 



Glacial Lake Blue Ridge, 91 



Glacial Lake Minerva, 90 



Glacial Lake Pottersville, 88 



Glens Falls limestone, 68 



Granite, 40; dikes of in anorthosite, 

 28; broad intrusive tongues of> in 

 anorthosite, 29; thin section of, 

 table, 41; description of, 41 



Granite porphyry, description of, 41 



Granitic syenite, description, 40; thin 

 sections of, table, 41 



Graphite, 96 



Green hill, 6 



Grenville, 10-16, 43 ; other areas of, 

 15; absence of, from anorthosite 

 area, 32; structure, 71 



Grove Point, 14, 19, 62, 63 



Hall, C. K, cited, 8, 63, 66 



Hayes mountain, 6, 15., 19, 39, 51, 82 



Hewitt pond, 6, 41, 46, 82 



Hewitt pond brook, 16, 41, 46, 50 



Hewitt pond hill, 6 



Hewitt road, 20 



Hoffman mountain, 6, 19 



Hoffman notch fault, 81 



Hornblende gneiss, 43 



Ice movement, direction of, 84 

 Irishtown, 12, 15, 19, 20, 31, 40 

 Iron ore, 97 



