182 GEOLOGICAL SURVEY OF THE TERRITORIES. 



Mount Blackmore, Montana Territory; beautiful blue specimens 

 with jasper, in Hot Spring district, Montana Territory ; from Jack- 

 son's Lake, Wyoming Territory. Carnelian, from Grand CaSon 

 of Yellowstone. Ghrysoprase, Bast Fork of Yellowstone Eiver. 

 Prase, East Fork of Yellowstone Lake, Montana Territory ; Wil- 

 low Canon, Utah Territory ; near lower cafion of Madison Eiver, 

 Montana Territory. Agate, banded, near Fort Ellis, Montana Ter- 

 ritory ; in ^Yellowstone Valley, above second caQon ; East Fork of 

 Yellowstone Kiver, near Elk Creek, Yellowstone Valley, Colorado 

 Springs, Colorado Territory. Moehastone (moss-agate,) nearBoteler's 

 ranch, Yellowstone Valley, Montana Territory. Fli7it, (bluish 

 variety,) in valley of Yellowstone ; West Gallatin River 5 (brown va- 

 riety,) Pole Creek near Madison River, Montana Territory ; (black 

 variety,) East Fork of Yellowstone River. Jasper, (red variety,) in 

 conglomerates, near Ogden, Utah Territory ; near Fort Ellis, Mon- 

 tana Territory ; Yellowstone Valley, Montana Territory ; back of 

 Boteler's ranch, Montana Territory; East Fork of Yellowstone 

 Eiver ; near Elk Creek, Montana Territory ; east side of Middle 

 Canon of Madison River ; (yellow variety,) Bridger Peak, near Fort 

 Ellis, Montana Territory ; East Fork of Yellowstone River ; (gray 

 variety,) East Fork of Yellowstone; (green variety,) East Fork of 

 Yellowstone Eiver; near Horseshoe Bend of Missouri River, below 

 Gallatin City, Montana Territory ; on Henry's Fork of Snake River; 

 (black variety,) East Fork of Yellowstone River. SiUcified wood, 

 abundant throughout the valleys of Yellowstone, Madison, and Gal- 

 latin Rivers, and on the Yellowstone National Park. Itacolumite, 

 (common inflexible variety,) near Mount Cowan, Yellowstone Valley. 



Eipidolite. In metamorphic rocks, near Ogden, Utah Territory ; east 

 side of Middle Caiion of Madison River, Montana Territory ; near 

 Henry's Lake, Idaho Territory ; Teton Mountains, Idaho Territory. 



Sanidine. (See Feldspar.) 



Satin-spar. (See Gypsum.) 



Selenite. (See Gypsum.) 



Serpentine. Near Ogden, Utah Territory ;• in Snowy Range of Yellow- 

 stone; divide between Madison and Galliitin Rivers ; Alder Gulch, 

 near Virginia City, Montana Territory ; Cafion Creek, a branch of 

 T6ton River, Idaho Territory. 



Silicifled wood. [See Quartz.) 



Silver, (Native.) Cherry Creek mines, Madison County, Montana Terri- 

 tory ; in galena, from Little Cottonwood Canon ; Clarke's Fork mines. 



Sphalerite, (zinc blend.) Little Cottonwood Canon, Utah Territory. 



Stroutianite, (carbonate of strontia.) Sawtelle's Peak, near Henry's 

 Lake, Idaho Territory. 



Sulphur. In crystals, at Gardiner River Hot Springs ; on bluffs op- 

 X^osite Tower Falls ; in Mud Springs, near Mount Washburne, in 

 small crystals ; Crater Hills, Yellowstone Valley ; geyser-basin of 

 Fire-Hole River ; Shoshone Lake geyser-basin ; on divide between 

 Yellowstone and Fire-Hole Rivers. 



Talc. Near Ogden, Utah Territory; in Snowy Range of Yellowstone, 

 Montana Territory ; near Henry's Lake, Idaho Territory ; T^ton 

 Mountains, Idaho Territoi-y. 



Tremolite. (See AmpMhole.) 



Tufa, (Calcareous.) At Hot Springs, Gardiner's River ; Warm Springs, 

 near Fort Hall, Idaho Territory ; Grand Canon of Snake River, 

 Idaho Territory. 



Wulfenite. Little Cottonwood Canon, Utah Territory. 



