	(1982) Mineral resources of the Sheep Mountain Wilderness study area and the Cucamonga Wilderness and additions, Los Angeles and San Bernardino Counties, California. Bulletin Vol. 1506. US Geological Survey doi:10.3133/b1506ae	Report (volume)
	Cucamonga Wilderness and Additions, San Bernardino County, California By NICHOLAS T. ZILKA and STEVEN W....Cucamonga Wilderness and additions, San Bernardino County, California, by Nicholas T. Zilka and Steven W...Mount Baldy mining district. The largest lode mine in the district, the inactive Big Horn mine, has produced...have moderate potential for the discovery of 1 Mine Gold Tungsten 5? Au W Lowest level of resource...percent of the total values produced. The Big Horn mine is estimated to hold 1.2 million tons (l.l million
	Hawley, C.C. (1969) Geology and beryllium deposits of the Lake George (or Badger Flats) beryllium area, Park and Jefferson Counties, Colorado. Professional Paper 608a. US Geological Survey doi:10.3133/pp608a	Report (issue)
	Beryllium Area, Park and Jefferson t:-1 Counties, Colorado g ~ s:p ~ I> li:tl ~ GEOLOGICAL SURVEY PROFESSIONAL...Flats) Beryllium Area, Park and Jefferson Counties, Colorado By C. C. HAWLEY GEOLOGY AND ORE DEPOSITS OF THE...SOUTHERN TARRYALL REGION PARK AND JEFFERSON COUNTIES, COLORADO GEOLOGICAL SURVEY PROFESSIONAL PAPER 608-A A...and representative mines _______________ _ Boomer mine area _____________________________ _ Rocks ____...Greisen ___________________________________ _ Boomer mine ______________________________ _ J & Sgroup ___
	Evans, James G., Pankraatz, Leroy, Ridenour, James, Schmauch, Steven W., Zilka, Nicholas T. (1977) Mineral resources of the Sheep Mountain Wilderness study area and the Cucamonga Wilderness and additions, Los Angeles and San Bernardino counties, California. Open-File Report Vol. 1977 (77-251) US Geological Survey doi:10.3133/ofr77251	Report (issue)
	Wilderness area and additions, San Bernardino County , California By Nicholas T . Zilka and Steven W...Curtis claims 64 Big Horn mine 70 Allison mine 71 Stanley-Miller mine -----------------------------------------...---------------- 71 Baldora (Widco) mine ---------------------------------------- 78 ----------...--------------------------- 85 Eagle mine Gold Dollar mine --------------------------------------------...Cucamonga Wilderness and a dditions, San Bernardino County , California --------------------- 91 -----
	*MacFall, Russell P. (1969) Gem Hunter's Guide* (4th ed.) Thomas Y. Crowell Company, New York.**	Book (edition)
	describes sites under of the nearest town and county. and the many maps included book contain such...fundamental clue to gem locations. Since hard-rock mining is too expensive for amateurs, the hobbyist ...minerals. He will pick over stream beds, gravel pits, mine dumps, road cuts, and quarries. Some gems may also...Distribution Center in Denver Federal Center, Denver 25, Colorado. The centers supply on request a free index, from... even an unfenced range, a deserted cabin, or a mine dump. Be ready to sign a waiver absolving the owner
	*Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.*	Book
	P. Blake, professor of mineralogy, geology and mining the at College of California, parent to the...mineralogist of California, and pub- and sixth State Mining Bureau reports. Then beginning volume prepared...species are reported by 1-2 shows the county boundaries and county names. When possible, locations of mines...within a township is illustrated by Figure 1-1. county of occurrence. Map M. Fleischer’s 1980 Glossary...DESERT IX TRANSVERSE RANGES X PENINSULAR RANGES XI COLORADO* DESERT GOLD-BEARING AREA I U Map 1-1. Map
	*Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.*	Book
	P. Blake, professor of mineralogy, geology and mining at the College of California, parent to the University...California, and published in the fourth and sixth State Mining Bureau reports. Then beginning in 1914 with a volume...are reported by county of occurrence. Map 1-2 shows the county boundaries and county names. When possible...II TRANSVERSE RANGES X PENINSULAR RANGES XI ~ COLORADO DESERT GOLD-BEARING AREA Map 1-1. Map of California...,o Map 1-2. Outline map of California showing county boundaries. __ _) 4 MINERALS OF CALIFORNIA

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Sillimanite from Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA

Sillimanite from
Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA