PRELIMINARY HANDBOOK OF THE DEPARTMENT OF GEOLOGY. 39 



silver-lead and bismuth ores ; Summit County, 11 specimens, all silver 

 and silver-lead ores; Piute County, 3 specimens silver-lead-copper 

 ores; Fremont County, 1 specimen coal ; Juab County, 3 specimens 

 silver-lead ores ; Millard County, 1 specimen each sulphur and silver- 

 copper ore ; Weber County, 1 specimen iron ore; Utah County, 2 spec- 

 imens iron aud silver-lead-copper ores; Tooele County, 95 specimens 

 silver-lead and silver-lead-copper ores: Salt Lake County, 134 speci- 

 mens silver-lead and silver lead-copper ores; San Pete County, 2 spec- 

 imens gypsum; Washington County, 6 specimens silver ores; Iron 

 County, 5 specimens iron ore aud 2 specimens antimony ore; Wasatch 

 County, 1 specimen silver-lead ore; Morgan County, 2 specimens iron 

 ore; Emery County, 1 specimen of ozokerite; Uintah County, 1 speci- 

 men each Wurtzilite and Uintaite. 



(42) Colorado by 428 specimens, of which number 2G7 specimens are 

 eruptive and sedimentary rocks, ores, aud vein materials, as collected 

 and described by Messrs. Emmons and Cross, in Monograph xir, U. S. 

 Geological Survey, entitled "The Geology and Miniug Industry of 

 Leadville." The remainder of the materials are divided as follows: 

 Lake County, 14 specimens silver-lead ores; Gilpin County, 21 speci- 

 mens auriferous pyrites and silver-lead ores ; Boulder County, 59 

 specimens, including telluride ores of gold and silver, silver-lead ores, 

 and auriferous sulphurets; Clear Creek County, 10 specimens silver- 

 leadziuc and copper ores ; Pitkin County, 1 specimen copper ore ; Park 

 County, 9 specimens silver-lead ore ; La Plata County, 13 specimens 

 silver lead ores; Ouray County, 1 specimen silver ore; Fremont County, 

 G specimens silver-lead aud copper ores; Summit County, 4 specimens 

 silver-lead ores; Jefferson County, 9 specimens auriferous pyrites, 

 copper, and silver-lead ores; Gunnisou County, 6 specimens silver-lead 

 ores ; Pueblo, 1 specimen zinc ore ; Custer County, G specimens silver- 

 lead and iron ores ; Las Animas County, 1 specimen iron ore. 



(43) Arizona by GO specimens, of which 2 are lead ores, 2 silver-lead, 

 2 silver-lead-copper, 6 silver and copper, 36 copper, 2 copper and mer- 

 cury, G silver, aud 1 each of gold, chromite, infusorial earth, and barite. 



(44) New Mexico by 28 specimens, of which 6 are gold ores, 1G silver, 

 4 copper, 1 lead, and 1 chrome iron. The exhibit includes also one 

 specimen of the so-called "riccolite," a serpentineous rock used for orna- 

 mental purposes. 



IV.— PACIFIC SLOPE REGION. 



(45) California. This State is at present represented by 207 speci- 

 mens of various kinds, as below: Butte County, 18 specimens placer 

 and vein golds ; Mariposa County, 10 specimens quartz-gold ore; Inyo 

 County, 13 specimens quartz-gold ore; Calaveras County, 13 specimens 

 quartz-gold ore; Yuba County, 5 specimens gravel and placer gold ores ; 

 El Dorado County, 1 specimen silver and 6 gold ores ; Nevada County, 

 19 specimens quartz and gravel gold ores ; Mono County, 1 specimen 

 silver-copper ore; Tehama County, 1 specimen sulphur; Santa Bar- 

 bara County, 1 specimen each asphalt and gypsum j Lake County, 9 



