356 GEOLOGICAL SURVEY OF THE TERRITORIES. 



ACTINOLITE. — In radiated form, of light-green color, on station 2, E» 

 On Buffalo and Sopris Peaks, P. Bergen's ranch and Isforth Bonider 

 Creek, S. 



Agate. — Cloudy, of white and gray color in the trachytic formations "of 

 station 27, in various forms at the Los Pinos agency, E. In South 

 Park, in the Arkansas Valley, and on the Frying Pan in varieties, P. 

 Throughout Middle Park, M. 



Alabandite. — At Quartzville, Peters. 



Alabaster.— Mount Yernon, S. 



Allophanite. — Frankline mine, in Gilson Gulch ; Fowler and Wells's, 

 tunnel. Sugar Loaf district, S. 



Aluminite. — Mount Yernon, S. 



Alum. — Mount Yernon, S. 



Amazon stone, (Adularia.) — Elk Creek, S. 



'Amethyst. — At Nevada and other neighboring localities, S. On Rock 

 Creek, P. 



Amianthite. — North Boulder Creek, E. 



Amphibole. — Buffalo Peak, P. Montgomery, Peters. 



Anglesite. — Freeland mine on Trail Creek, S. In crystals at the Horse- 

 shoe lead-mine, in South Park, Peters. 



Anhydrite. — On Elk Creek, F. Crystallized at the salt-works in South 

 Park, Peters. 



Anthophyllite. — North Boulder Creek, S. 



Apatite. — At Fairplay, Peters. 



Apophyllite.— Station 22, E. 



Aragonite. — Occurring in the form usually termed Jlos ferri, very 

 beautifully in Marshal's tunnel, Georgetown, B. Golden, S. 



Argentitb. — Colorado Central Mine, Terrible, and other mines at 

 Georgetown ; in the No Name, Caribou, and others at Caribou ; in 

 some mines near Nevada; in the Senator lode of the Hardscrabble 

 mining-district ; it occurs mostly in small quantities, imbedded either 

 in quartz or in the predominating ore ; when decomposed, native sil- 

 ver is the result, E. At the Silver Star, Moore, and other mines near 

 Fairplay, Peters. 



Arsenophyrite. — Priest Mine, Fairplay, Peters. 



Asbestus. — Occurs in small quantities, partly radiated, near Caribou, E. 



AVENTURINE FELDSPAR. — On Elk Creek, S. 



AzuRiTE. — In the No Name, together with malachite, the result of de- 

 composition of fahlerz, Caribou ; in the Eosita mines in Hardscrabble, 

 E. On Trail Creek, S. On Crater Mountain, in the mines around 

 Fairplay, and in the mines of Elk Mountain district, P. 



BiSMUTHiTE. — In the Las Animas mine, pseudo morphous after — 



BiSMUTiTE. — From the Las Animas mine, Sch. 



Barite. — In yellow tabular crystals, clear in the Tenth Legion mine of 

 Empire, in the Terrible mine near station 17, and on station 46; near 

 Canyon City transparent crystals occur in the arenaceous formations 

 of that locality, E. In Gilson Gulch, Georgetown, S. Crystals occur 

 in the limestones around Fairplay, P. 



Basanite. — East of the salt-works in South Park, P. 



Beryl. — On Bear Creek, Tiftanny's ranch, S. 



Biotite. — On Buffalo Peak and station 64, P. 



BiTUiMiNOUS COAL. — At Several localities along the Border range, at 

 Pueblo and Canyon, E. On Trout Creek Pass, P. 



Brucite. — On James Creek, P. 



Oalcite. — In small crystals, scalenohedra, at the Monte Christo Cen- 

 tral ; on station 35, camp 32, E, At Mount Yernon, Bergen's ranch, 



