180 GEOLOGICAL SURVEY OF THE TERRITORIES. 



E^eldspar, {OrtJioclase.) In syenites at Ogden, Utah Territory ; in granites 

 at Colorado Springs, Colorado Territory, in red masses ; in granites 

 throughout Idaho and Montana Territories. Scmidine, in trachytes, 

 throughout the Yellowstone National Park and Montana and Idaho 

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



Flint. (See Quartz.) • ^ 



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

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

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

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

 "near Gardiner's Kiver ; Hot Springs, near lower caiion of Madison 

 Eiver, in gneiss ; in gneiss on Cherry Creek, Montana Territory ; 

 near Henry's Lake, Idaho Territory ; in rocks of the T6ton Eange, 

 Idaho Territory. 



Galenite, (sulphide of lead,) (argentiferous.) Little Cottonwood Caiion, 

 Utah Territory ; Central City, Colorado Territory ; Emigrant 

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

 Eiver ; Yellowstone National Park ; Hot Springs district. Silver 

 Sbower district, and other mining districts in Montana Territory. 



Geyserite. (See Opal.) 



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

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

 ains, Idaho Territory. 



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

 stone Valley, Montana Territory ; near Virginia City, Montana 

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

 tory ; Upi)er waters of Snake Eiver, Idaho Territory ; near Taylor's 

 Bridge, Idaho Territory. 



Graphite. Twelve miles north of Ogden, Utah Territory. 



Gypsum, (sul})hate of lime.) Colorado Springs, Colorado Territory. 

 Selenite, Colorado Springs, Colorado Territory ; opposite Hot 

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

 hot-spring deposits, opposite Tower Creek, on Yellowstone Eiver ; 

 Yellowstone National Park ; in Grand Caiion of Snake Eiver, 

 Idaho Territory. Satin-spar, Colorado Springs, Colorado Territory. 



Halite, (common salt.) In springs on Turbid Lake, near Yellowstone 

 Lake, Yellowstone National Park ; Great Salt Lake, Utah, in fine 

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

 Ogden, Utah Territory. 



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

 Brigliam City, Utah Territory ; near Madison Canon, Montana Ter- 

 ritory. Ironstone, Emigrant Gulch, Montana Territory. 



Hornblende. (See Amphibole.) 



Jasper. (See Quartz.) 



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

 tory ; near Fort Ellis, Montana Territory. 



Lithomarge. Little Cottonwood Caiion, Utah Territory. 



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

 rado Territory ; in gneisses near Ogden, Utah Territory. 



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

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

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



Massicot (lead-ocher.) Little Cottonwood Caiion, Utah Territory 



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

 Black- Tail Deer Creek, Montana Territory ; T6ton Mountains, Idaho 

 Territory ; (var., Fuchsite,) from east side of Madison Canon, Mon- 

 tana Territory. 



