180 GEOLOGICAL SURVEY OF THE TERRITORIES. 



Feldspar, {Orthocluse.) In syonites at Osdeu, Utah Territory ; in granites 

 at Colorado Hprinfi^s, Colorado Territory, in red masses ; in i^ranites 

 thi'ougliont Idaho and Montana Territories. iSanidine, in tra(;hytes, 

 Ihronj^liont tlie Yellowstone National Park and Montana and Idaho 

 Territories. Amazon stone, near Colorado City, Colorado Territory. 



Flint. (See Quartz.) 



Garnets. In ji,neissic rocks near Golden City, Colorado Territory; in 

 gneiss near Ogden, Utah Territory ; in second canon of the Yel- 

 lowstone, above Boteler's, Montana Territory ; in Emigrant Gulch, 

 Montana Territory ; in micaceous gneiss, on Bhick-Tail Deer Creek, 

 near Gardiner's River; Hot Springs, near lower canon of Madison 

 Eiver, in gneiss; in gn(>iss on Cherry Creek, Montana Territory ; 

 near Henry's Lake, Idaho Territory; in rocks of the Teton llange, 

 Idaho Territory. 



Galenite, (sulj)hide of lead,) (argentiferous.) Little Cottonwood Caiiou, 

 Utah Territory ; Central City, Colorado Territory ; Emigrant 

 Gulch, Montana Territory ; Clarke's Fork of the Yellowstone 

 Kiver ; Yellowstone National Park ; Rot Springs district, Silver 

 Shower district, and other mining districts in Montana Territory. 



Geyserite. (See 0/>rt/.) 



Glauconite. East side of Madison Eiver, in Middle CaQon, Montana 

 Territory; near Gallatin City, Montana Territory ; Teton Mount- 

 ains, Idaho Teriitory. 



Gold. Central City, Colorado Territory ; Emigrant Gulch, Yellow- 

 stone Valley, Montana Territory ; near Virginia City, Montana 

 Territory; Hot Springs distrust, Madison County, Montana Terri- 

 tory ; Upper waters of Snake River, Idaho Territory ; near Taylor's 

 Bridge, Idaho Territory. 



Grai)hite. Twelve miles north of Ogden, Utah Territory. 



Gypsum, (sulphate of lime.) Colorado Springs, Colorado Territory. 

 Selenite, Colorado Springs, Colorado Territory ; opposite Hot 

 Springs, at Gardiner's Kiver, Yellowstone National Park ; in old 

 liot-spring deposits, opposite Tower Creek, on Yellowstone Kiver; 

 Yellowstone National Park; in Grand Canon of Snake River, 

 Idaho Territory. Satin-spar., Colorado Si)rings, Colorado Territory. 



Halite, ((common salt.) In springs on Turbid Lake, near Y'ellowstone 

 Lake, Yellowstone National I'ark ; Gieat vSalt Lake, Utah, in fine 

 crystals coating wood ; in springs in Idaho Territory ; springs above 

 Ogden, Utah Territory. 



Hematite, (oxide of iion,) (micaceous.) Near Ogden, Utah Territory; near 

 Brighani City, Utah Territory ; near Madison C a iion, ]\ I on tan a Ter- 

 ritory. Iron-stone, I^jUiigraut Gulch, Montana Territory. 



Hornblende. (See Amphibole.) 



Jasper. (See Quartz.) 



Limonite, (sesquioxide of iron.) Little Cottonwood Caiion, Utah Terri- 

 tory ; near Fort Ellis, Montana Territory. 



Lithomarge. Little Cottonwood Canon, Utah Territory. 



Magnetite, (magnetic-iron ore.) In gneissic rock, near Golden City, Colo- 

 rado Territory ; in gneisses near Ogden, Utah Territory. 



Malachite, (green eaibonate of copper.) Upper end of Ogden Canon, 

 near Ogden City, Utah Territory ; near Virginia City, Montana 

 Territory ; Clarke's Fork of Yellowstone Kiver, Montana Territory. 



Massicot (leadocher.) Little Cottonwood Canon, Utah Territory 



Muscovite, (common mica.) Near second caiion of Yellowstone; near 

 Black-Tail Deer Creek, Montana Territory ; Teton Mountains, Idaho 

 Territory ; (var., F'uchsite,) from east side of Madison Caiion, Mon- 

 tana Territory. 



