6 4 



NEW YORK STATE MUSEUM 



Fox Hill, 10, 12, 13 

 Fraker mountain, 45 

 Frankfort shale, 38, 47, 59 



Gabbro, 60 



Gabbro dikes, 24-25, 58 



Gal way, 5, 29, 31, 32, 34, 35, 3&, 37, 



46, 61 

 Gal way fault no. 1, 47-48 

 Galway fault no. 2, 48 

 Garnet, 9, 10, 11, 13, 14, 15, 18 

 Geologic history, summary of, 56- 



59 



Gifford valley, 28, 29, 30, 31, 32, 39 



Glacial geology, 7, 59 



Glens Falls, 35 



Glenwild, 9 



Glowegee creek, 48 



Gneisses, 9, 10, 13; mixed, 22. See 

 also Grenville gneiss 



Granite, mixed with other rocks, 22 



Granite porphyry, description, 17-21; 

 analysis of, 18-20; compared with 

 other Adirondack rocks, 20-21 



Granitic rocks, 12 



Graphite, 9, 57, 62 



Grenville series, 26, 27, 30, 40, 41, 42, 

 44, 45, 51, 52, 57, 60, 61, 62; de- 

 scription, 8-14; proofs of sedi- 

 mentary origin, 8; varieties of, 

 8i-ii; igneous rocks, 11; areal 

 distribution, n-13; stratigraphy 

 and thickness, 13-14; mixed with 

 other rocks, 22 



Hans creek, 6, 56 



Hill, cited, 7 



Hoffman's Ferry fault, 46-47, 49, 54 



Hornblende, 10, 11, 13, 14, 15, 25 



Hoyt limestone, 29, 30 



Hypersthene, 11, 24, 25 



Igneous rocks in the Grenville, 11 



Jackson creek, 42 

 Jackson creek fault, 40 

 Johnnycake lake, 12 

 Johnstown, 39 



Kemp, cited, 7, 50 



Kennyetto creek, 6, 32, 34, 37, 49, 



55-56 

 Kimball's Corners, 26 



Labradorite, 11, 24, 25 



Lake Sacandaga, 56 



Lateher, J. W., mentioned, 45 



Leucoxene, 24 



Limestone, 12; for quicklime, 61 



Little Falls, 35 



Little Falls dolomite, 31-32, 33, 38, 



39, 4i, 42, 43, 44, 45, 47, 48, 58, 



60, 61 

 Lowville limestone, 32, 33, 34~35, 42, 



49 

 Luzerne, 54 





7, 



Magnetite, 9, 10, 11, 14, 15, 17, 18, 



24, 25 

 Mather, cited, 7 

 Mayrield, 30, 31, 32, 33, 34, 35, 37, 



39, 42, 49, 54, 60, 61 

 Mayfield creek, 56 

 Mayfield fault, 41-42 

 Mica, 9, 12, 61, 62 

 Microcline, 9, 10, 11, 17, 18, 23 

 Microperthite, 9, 10, 11, 14, 15, 17, 



18 

 Miller, W. J, cited, 8 

 Mixed gneisses, 22 

 Mohawk river, 6 

 Mohawk valley, 35 

 Mohawk valley faults, 38 

 Monticulipora (Prasopora) lycoper- 



don, 36 

 Morley, E. W., analyses by, 15-1I 



18-20 

 Mosherville, 9, 27, 29, 46 

 Munsonville, 37 

 Murchisonia bellicincta, 36 

 Muscovite, 23 



Norite, 11 



North Broadalbin, 35, 37, 48, 49 

 North Galway, 12, 26, 29, 30, 46, 51, 



52 

 Northampton, 6, 29, 32, 44, 49, 54, 



56, 61 



