CATALOGUE OF AMERICAN LOCALITIES OF MINERALS. 369 



COLORADO. 



The principal gold mines of Colorado are in Boulder, Gilpin, Clear 

 Creek, and Jefferson Counties, on a line of country a few miles W. of 

 Denver, extending from Long's Peak to Pike's Peak. A large portion 

 of the gold is associated with veins of pyrite and chalcopyrite ; silver 

 and lead mines are at and near Georgetown, Clear Creek County, and 

 to the westward in Summit County, on Snake and Swan rivers. 



At the Georgetown mines are found : — native silver, pyrargyrite, 

 argentite, tetrahedrite, pyromorphite, galenite, sphalerite, azurite, 

 aragonite, barite, fluorite, mica. 



Trail Creek. — Garnet, epidote, hornblende, chlorite ; at the Free- 

 land Lode, tetrahedrite, tennantite, anglesite, caledonite, cerussite, 

 tenorite, siderite, azurite, minium ; at the Champion Lode, tenorite, 

 azurite, chrysocolla, malachite ; at the Gold Belt Lode, vivianite ; at 

 the Kelly Lode, tenorite ; at the Coyote Lode, malachite, cyano- 

 trichite. 



Near Black Hawk. — At Willis Gulch, enargite, fluorite, pyrite ; at 

 the Gilpin County Lode, cerargyrite ; on Gregory Hill, feldspar ; 

 North Clear Creek, lievrite — Galenite ! 



Bear Creek.— Fluorite, beryl ; near the Malachite Lode, malachite, 

 cuprite, vesuvianite, topazolite ; Liberty Lode, chalcocite. 



Snake River. —Penn District, embolite ; at several lodes, pyrar- 

 gyrite, native silver, azurite. 



Russell District. — Delaware Lode, chalcopyrite, crystallized gal- 

 enite. — Epidote, pyrite. 



Virginia Canon. — Epidote, fluorite ; at the Crystal Lode, native 

 silver, spinel. 



Sugar Loaf District. —Chalcocite, pyrrhotite, garnet (mangane- 

 sian). 



Central City. — Garnet, tenorite ; at Leavitt Lode, molybdenite ; 

 on Gunnell Hill, magnetite ; at the Pleasantview mine, cerussite. 



Golden City. — Aragonite ; on Table Mountain, leucite in amygda- 

 loid. 



Bergen's Ranche. — Garnet, actinolite, calcite. 



Boulder Co. — Red Cloud Mine : Native tellurium, altaite, hessite 

 (petzite), sylvanite, calaverite, schirmerite. Keystone Mine : Colora- 

 doite, magnolite, ferotellurite, tellurite, roscoelite ? also part of these 

 at Smuggler mine and Mountain Lion mine. Grand View mine : syl- 

 vanite, etc. 



Lake City, at the Hotchkiss Lode. — Petzite, calaverite (?), etc. 



Lake Co., Golden Queen mine. — Scheelite, gold. 



Pike's Peak, on Elk Creek. — Amazon -stone ! ! smoky quartz ! ave?i- 

 t urine feldspar, amethyst, albite, fluorite, hematite, anhydrite (rare), 

 columbite. 



San Juan District. — Gold, sphalerite, pyrite, galenite, chalcocite, 

 covellite, chalcopyrite. 



CANADA EAST . 



Abercrombie. — Labradorite. 



Aubert. — Gold, iridosmine, platinum. 



Bale St. Paul. — Menaccanite! apatite, allanite, rutile. 



