 | | Journal (article/letter/editorial) | | 45, 1982, PP. 87 99 The Laytonville Quarry (Mendocino County California) exotic block: iron-rich blueschist-facies...University of Cambridge ABSTRACT. The Laytonville Quarry exotic block con- panying quartzites have become...recalculation, see the Appendix. THE Laytonville Quarry exotic block is the type locality for the minerals... Situated 8 km south of Laytonville (Mendocino County, California), the exotic block, originally 40 m...while the accomFIG. 1. Lithology of the Laytonville Quarry exotic * Present address: 20 Emery Street, Cambridge |  | | Report (issue) | | Powder Pattern: Laytonville district, California, USA. (ICDD 19-421). 9.03 (100), 3.01 (70), 2.64 (55)...00 4.19 (1) Laytonville district, California, USA. (2) Do.; by electron microprobe. (3) Ambin massif...temperature. Association: Howieite, zussmanite, stilpnomelane, spessartine, riebeckite, quartz, aegirine,...district, California, USA). Distribution: In the USA, in California, in the Laytonville quarry, at Covelo, and...Benito Co.; in Oregon, at Wild Horse Lookout, Curry Co., and in the Powers quarry, Coos Co. From Salbertrand |  | | Journal (issue) | | Three Interesting Silicates from the Laytonville Quarry, California Robert J. Lauf Oak Ridge, Tennessee...silicate minerals were discovered at the Laytonville quarry, Mendocino Co., California, Agrell and coworkers...collector. Geology of the Laytonville Quarry The Laytonville quarry, Mendocino Co., California, contains...a diverse mineral assemblage that includes stilpnomelane, spessartine, riebeckite, crocidolite, quartz...(Agrell, Bown, and McKie 1964). The Laytonville quarry exotic block represents a series of deep-ocean |  | | Journal (article/letter/editorial) | | at only one locality: the Laytonville Quarry, Mendocino County, California. There are, however, present...similarities are demonstrated within two rocks from the quarry in which a manganese concentration gradient has...zussmanite with I3, pyrosmalite with I6, and stilpnomelane with 48. t \\ ////'/// FIG. I. Hexagonal...the twenty-four tetrahedra 'raft unit' of the stilpnomelane structure. Several rare mineral species possess...chemical variants (ekmanite or parsettensite from stilpnomelane, Eggleton, I972) or as structural adaptations |  | | Report (issue) | | X-ray Powder Pattern: Laytonville, California, USA. (ICDD 19-571). 9.18 (100), 7.91 (80), 3.25 (65)...Chemistry: (1) Laytonville district, California, USA; analysis not given, stated 3+ to correspond to (Na1:03...(Laytonville district, California, USA). Association: Deerite, zussmanite, stilpnomelane, spessartine, riebeckite... California, USA). Distribution: In the USA, in California, from the Laytonville quarry, and at Covelo...Clara and Merced Cos.; and in the Powers quarry, Coos Co., Oregon. From Brezovica, Yugoslavia. In the |  | | Journal (article/letter/editorial) | | normal sodic amphiboleforming reactions from stilpnomelane and chlorite (in the presence of iron oxides...paper were collected from localities in California, Oregon, Washington State, the Alps, and Greece. Further...within the following authors' works: Laytonvitle Quarry exotic block, Mendocino Co., California--Chesterman...Fork), Santa Clara Co., California and Powers Quarry, Coos Co., Oregon--Muir Wood (I977); Shuksan, Washington...from the magnesio-riebeckite 'corner'. (b) Stilpnomelane-chlorite. For sodic amphiboles with moderate |  | | Journal (article/letter/editorial) | | discovered by Agrell at the Laytonville Quarry, Mendocino County, California, and named as such in Agrell...I. t t o w i e i t e localities I. Laytonville Quarry, Mendocino Co., California (Agrell et al., I965)...California (Chesterman, unpubl.) 7- Powers Quarry, Coos Co., Oregon (Muir Wood, 19771 8. Taneyama Mine...chemical analyses; two by Scoon (from Laytonville Quarry material) and a partial one by Aoki (on Japanese...many of the Laytonville Quarry assemblages, also in one rock from the Powers Quarry (Locality 6). (The compositions |  | | Journal (issue) | | CiEOLOCiY formerly THE ORE BIN published by the Oregon Department of Geology and Mineral Industries VOLUME...7 JULY 1980 Published monthly by the Stale of Oregon Depart ment of Geology and Min erallnd uSlries...ription o rders, renewals, and c hanges of address to Oregon Geology, 1069 State O ffice Build ing, Po rtland...review shou ld be nOted in the acknowledgments. The Oregon Department of Geology and Mineral Industries announces...program in the State of Oregon. Special Paper 6, The Geology of the La Grande Area, Oregon, summarizes the results |  | | Journal (article/letter/editorial) | | exotic blocks and in more coherent formations), Oregon, Washington State, the Alps, Corsica, Turkey, Greece...TABLE I. Deerite localities I. Laytonville Quarry, Mendocino County, California: Agrell et al. (1965). z....Santa Clara County, California: Muir Wood (I977). 8. Wild Horse Lookout, Curry County, Oregon: Coleman (I972)...(I972). 9- Powers Quarry, Coos County, Oregon: Coleman (pers. comm.). Io. Finney Creek, Shuksan Unit...Schliested (I978). 16. Siibren-Karaalan, Eskisehir County, Turkey: Taylan Liinel (1966). 17. Diah6t Valley |  | | Journal (issue) | | CiEOLOCiY formerly THE ORE BIN published by the Oregon Department of Geology and Mineral Industries VOLUME...VOLUME 42, NUMBER 2 FEBRUARY 1980 OREGON GEOLOGY (lSSN 0164·3304) VOLUME 42, NUMBER 2 FEBRUARY 1980...1980 Published monthly by the State of Oregon Department of Geology and Mineral Industries (Volumes 1...subscription orders, renewals, and changes of address to Oregon Geology, 1069 State Office Building, Portland,...postage paid at Portland, Oregon. Postmaster: Send address changes to Oregon Geology, 1069 State Office |  | | Report (volume) | | The Colebrooke Schist of Southwestern Oregon and its Relation to the Tectonic Evolution of the Region...PLATE 1. Geologic map of part of southwestern Oregon showing distribution of the Colebrooke Schist___________________...metamorphic rocks of New Zealand, southwestern Oregon, and California________ 12. Triangular plot of...Physical and mineralogic character of southwestern Oregon serpentinites_ __ __ _ _ __ _ _ _ _ _ _ _ _ _ _...46 52 54 THE COLEBROOKE SCHIST OF SOUTHWESTERN OREGON AND ITS RELATION TO THE TECTONIC EVOLUTION OF THE |  | | Journal (article/letter/editorial) | | crystals, Bachelor mine, Amethyst vein system, Mineral County, Colorado; Dave Bunk specimen, Jesse La Plante...Uvite with Overgrown Dravite, Bigelow, St. Lawrence County, New York, 250–59; Gemstone Deposits in Turkey...Geological Museum of China, 434–39 Chips from the Quarry, M. E. Huizing, 5–11, 101–3, 197–203, 293–97, 389–93...Uvite with Overgrown Dravite, Bigelow, St. Lawrence County, New York, M. Lupulescu, S. C. Chamberlain, M....Wavellite Mine, East Dug Hill Area, Near Avant, Garland County, Arkansas, A. E. Smith, 346–50 F Fabre collection |  | | Journal (article/letter/editorial) | | University] at 07:55 02 December 2014 Figure 1. County map of New York State, prepared by William Besse...B Y C O U N T Y Albany County Indian Ladder: brookite; F. Old Callanan quarry: dolomite, barite, strontianite;...11 August 1859: olivinebronzite chondrite. Bronx County Various excavations: chabazite, harmotome, quartz...quartz (amethyst), stilbite; F. Clinton County Au Sable Forks, iron mines north of: microcline (sunstone)...stilbite, titanite, zircon, others; F, C. Columbia County Ancram lead mines: barite, galena, sphalerite, |  | | Report (issue) | | of the City of San Francisco and southern Marin County, Calif., including a description of the Franciscan...Formation. Roadcut on Sausalito lateral, Marin County ..... ............... . .........................on the Underground Water Supply of San Francisco County" (Bartell, 1913), popularly known as the "O'Shaughnessy...boreholes drilled by private firms and Federal, State, county, and municipal agencies provided data that were...exposed in southwestern Oregon and along much of western California from the Oregon border at least to Santa |  | | Book | | many years the mines and fields of St. Lawrence County have furnished museums and many lucky mineral col...been depleted through the the years, St. Lawrence County continues to supply many beautiful specimens to...types and mineralized zones of the St, Lawrence County area, A detailed discussion of the geology is beyond...and metamorphic rocks are found throughout the county, the latter prevails. Since more than three-fourths...(metamorphosed gabbro) is present locally across the county. Gabbro is a dark igneous rock composed chiefly |  | | Book (volume) | | chalcedony, jasper and gem petrified wood. BUFFALO COUNTY KEARNEY, area gravel bars and pits along the Platte...petrified wood. CASS COUNTY WEEPING WATER, SE, on rd. to Nehawka, in the Snyderville Quarry chalcedony, jasper...jasper, fossils. CHERRY COUNTY VALENTINE, in the Sandhills county along the Niobrara R. and Minnechaduza...gem qualityagatized and opalized wood. DAWES COUNTY CHADRON, in N part of Co. and as far W as Crawford...woods, etc. DAWSON COUNTY GOTHENBURG, in sand pitspetrified palm wood. DEUEL COUNTY CHAPPELL, all regional |  | | Report (volume) | | Boletin de Miuas, nos. 5, 6. Habana, Cuba. Delaware County Institute of Science: Proceedings, vol. 8, no....GEOLOGY, 1919-1&20. Oregon Bureau of Mines and Geology: Mineral Resources of Oregon, vol., 3, no. 1. Corvallis...Virginia Geological Survey: County Reports, Fayette County, Wehster County. Morganton, W. Va. Wisconsin...1920]. (with Wiuton, W. M.). The geology of Tarrant County: Texas, Univ., Bull. no. 1931, 123 pp., 6 pis.... 1920. Arey, Melvin F. 35. Geology of Ringgold County: Iowa Geol. Survey, vol. 27, pp. 33-64, 6 figs |  | | Book | | from the lavas of extinct volcanos near Plush, Oregon. How do these crystals get so big, if they have...I have ever visited was exposed by the Francon quarry on Montreal P L AT E 1 4 Pyrochlore crystals...technology. P L AT E I S Weloganite. Francon quarry, Montreal, Quebec. 4.s-cm crystal. Named for W...Unlike most carbonatites, those in the Francon quarry occur assills. A sill is a flat, sheetlike intrusion...example. Because the carbonatites in the Francon quarry formed sills, when the magma intruded the enclosing |  | | Report (issue) | | glauconite.________ 6. Analyses of minnesotaite, stilpnomelane, 8 thuringite, and bavalite_ _________ 7. Values...thuringite and other chlorites); minnesotaite, and stilpnomelane; and pyrite and marcasite. Many of these minerals...greenalite. Thuringite (bavalite), minnesotaite, and stilpnomelane are of common occurrence, however, and are described...it occurs in association with magnetite and stilpnomelane (Pulfrey, 1933). Thuringite and bavalite are...Glauconite from glauconitic limestone, Milburn Quarry, Otago, New Zealand. Analyst, Seelye (Hutton and |  | | Report (issue) | | College and county seat of Watauga County), Blowing Rock, Linville, and Newland (county seat of A very...very County). The main sources of income are tourism and farming. Tobacco (mountain burley), cabbage, beans...add to the undergrowth. Morganton and Lenoir, the county seats of Burke and Caldwell Counties, r~espectively...to biotite gneiss in outcrop. From roadcut along county road 0.7 mile S. 20° E. of road intersection at...He found that similar schist and gneiss in Floyd County, Va. are gradational with plutonic rocks of the |  | | Book (volume) | | considered since Mg and Al have similar scattering powers, and it is assumed that Li and Ti are not present...zone, Lake Hammersley, Clove quadrangle, Dutchess County, New York (Barth, 1936). Anal. T. F. W. Barth (Recalculated...replacement veins in the granodiorite of Snohomish County, Washington, and is considered by Axelrod and Grimaldi... Structural and petrologic studies in Dutchess County, New York. Pt. II. Bull. Geol. Soc. Amer., vol...distinctive from those of di-octahedral micas. Stilpnomelane may be mistaken for biotite (see p. 110). PARAGENESIS |  | | Report (issue) | | (CaBSiO4OH) vesicle filling from a basaltic Houghton County lava flow. Small specks of native copper occur...exceptionally fine, twinned analcite crystals from Houghton County ························-··-······-··-········...····· 41 2. Ankerite on siderite from Alpena County ···-··············-··················· 46 3....stalactitic limonite from Negaunee in Marquette County .................................................(Hexagonaria percarinata) of calcite from Charlevoix County .. ..... .. ....... ...... .. ............... |  | | Book | | searching for silver near Lake Sanford in Essex County discovered magnetite in 1826, but an excess of...Rochester; the main Public Library of Buffalo and Erie County; and the Crandall Public Library (Holden Research...pegmatite-Westchester County .......... . The Mclear pegmatite-St. Lawrence County .......... . Minerals...Tilly Foster magnetite mine near Brewster, Putnam County .................................... . Hematite...Counties .. Sterling mine, near Antwerp, Jefferson County ......... . Clinton hematite ................. | | | Book | | searching for silver near Lake Sanford in Essex County discovered magnetite in 1826, but an excess of...Rochester; the main Public Library of Buffalo and Erie County; and the Crandall Public Library (Holden Research...ciifce—Westchester County.................. Tne McLear pegmatite—5t. Lawrence County.....................Tilly Foster magnetite mine near Brewster, Putnam County..................................................Counties.. Sterling mine, near Antwerp, Jefferson County................. Clinton hematite............. |  | | Report (issue) | | miles away. Chert, greenalite, minnesotaite, stilpnomelane, magnetite, some hematite, and siderite probably...strike from eastern Cass County through Itasca County to Birch Lake in St. Louis County (Fig. 2). Although...extends from Pokegama Lake to a point in eastern Cass County, which is the western limit of exploration. TOPOGRAPHY...Grand Rapids to Birch Lake at the St. Louis County-Lake County line. In the east, the summits are as high...Mesabi has been explored only as far as eastern Cass County because the iron-formation there and westward is |
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