 | | Journal (article/letter/editorial) | | background. Minerals from the Pegmatites of the Crystal Mountain District LARIMER COUNTY, COLORADO MARK I. JACOBSON...districts in Colorado where nei ther all the pegmatites have been studied nor all the 230 ROCKS AND...MINERALS minerals described. It is therefore an ideal area for amateur mineralogists wishing to make significant...Index map of the Crystal Mountain district, Larimer County, Colorado. Location The Crystal Mountain district...Front Range of Colorado. Most of the district's pegmatites are found north of Drake in the Big Thomp son |  | | Journal (issue) | | P. 0. Box 39100 Lafayette, LA. 70593 California, USA This n otable Australian pegmatite locality has...December 1997 REGIONAL GEOLOGY The Coolgardie area is in the eastern part o f the Yilgarn craton where...trend north-east to south-west in the Coolgardie area. The granitoid rocks can be physica lly subdivided...last period of igneous activity in the Coolgardie area. Thickness 1ra1ii;rJpbic names and rocks Kurrawang...the Coolgard ie pegmatite field. Most of the pegmatites discussed in this report a re inter nally zoned; |  | | Report (issue) | | Publisher Lithographie, Ltd. Denver, Colorado, USA Design and Layout Gloria A. Staebler Managing Editor...Lithographie, Ltd. PO Box 11613 • Denver, CO 80211 • USA Phone: 1.303.495.5521 • Fax: 1.303.482.1238 www.lithographie...from Bob's Lake Chlorapatite Occurrence, Frontenac County, Ontario, Canada (see page 37-39). To indicate...Ca2 Pbi (PO4)3 OH Unnamed • Cl½ Sri (PO4)3 F Morelandite • Cl½Bai (AsO4)3 Cl Unnamed • Mn2 Cai (PO4)3...hydroxylapatite has been from Holly Springs, Cherokee County, Georgia, in the United States (Kay, Young, and |  | | Report (issue) | | C. A. Michael. COLD NUGGET FROM SPOTSYLVANIA COUNTY: Longest dimension approximately 13 cm., photograph...updated “check list” just alluded to, (2) a county-by-county listing of the minerals, and (3) resumes of...Cordieritc Tourmaline Group Elbaite Checklist Dravite Schorl Chrysocolla Pyroxene Group Monoclinic pyroxenes...(Haydcnitc) 9 Virginia Mineral Localities by County This list is included for possible aid in planning...listed only* if localities arc given for them. The county lists do not include com mon rock-making materials |
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