 | | Journal (article/letter/editorial) | | Engineering, University of Nevada, Reno, NV 89557, USA; pacebetsy@gmail.com * Correspondence: wcalvin@unr...campaign that covered large regions of California, USA, over multiple seasons. This work focused on a Southern...regions (“boxes”) within the state of California, USA, each time: Southern California, Santa Barbara, San...Mountains, and the Chocolate Mountains, which are just north of the US–Mexico border. Table 1. Band centers in...1. Imperial Imperial Valley, Valley, California, USA, study area. A true color image derived derived from |  | | Report (issue) | | PHYSICAL SCI. COUNTY REPORT 7 GEOLOGY AND MINERAL RESOURCES OF IMPERIAL COUNTY, CALIFORNIA Uk ... R&daubced. oj COUNTY IMPERIAL Gedifansua By Paul K. Morton Geologist COUNTY REPORT California...Sand Hills, as viewed toward the northwest from County Park. The prevailing wind direction, as indicated...PREFACE vi ABSTRACT vii INTRODUCTION Summary of County 1 Mineral Trends and Needs Principal Geographic...Conglomerate Borrego Formation Ocotillo Conglomerate Brawley Formation Quaternary acidic volcanic rocks Quaternary |  | | Journal (article/letter/editorial) | | illustrated lecture on "The Natural History of Calvert County" ; biologist, Rudy Scheltema for his sketch of...gave a fine talk on the Minerals of the Harding Mine, New Mexico, illustrated with excellent color slides...Club's annual dinner. The subject of her talk was North Africa and some of the colored slides could easily...further stop would be made on return at the Old Copper Mine on Stony Man Mountain, Va. Mr. Halliday sketched...Quartz, Adularia (orthoclase or feldspar), Albite, Muscovite, Chlorite, Epidote, Calcite, Amiant (Byssolite) |  | | Report (issue) | | Gold, base-metal, and related deposits of North Carolina 1011 by Gwendolyn W. Luttrell 12 U.S. Geological... Gold, base-metal, and related deposits of North Carolina Abstract Gold, silver, copper, lead, zinc,...barite, and rare-earths have been mined in North Carolina. Gold, with by-product silver, occurs in veins...along the borders of a granite body in Halifax 18 County. 19 and Vanoe Counties. 20- Tungsten minerals...occur with sulfides in vein|j deposits in Cabarrus County. 21 22 23 24 25- U. S. GOVERNMENT PRINTING OFFICE: |  | | Journal (issue) | | .................. 615 REPORT OF OUTING OF THE NORTH JERSEY MINERALOGICAL SOCIElY, JUNE 24t.n AND 25th...undersigned, being all of the officers of rhc Clark County Gem Co!l~tors, Inc., most sincerely wish to convey...'ial, . at ent iCS. ~- tor tor .dp- 1034 North Keystone Avenue, Chicago 51, 1llinois Introduction...conduct a radiometric and geologic survey of an area north of Champion, Michigan. As no work was done on Sundays...writer took advantage of collecting at the numerous mine dumps in the vicinity of Champion. It is hoped that |  | | Book (edition) | | .......................................... North Carolina ....................................................................... _............ . North Carolina ..................................................................................... . North Carolina .............................................the gem sapphires came from the mines in Fergus County, where they occur in a rock matrix. The majority...The development of the opal deposits of Humboldt County, Nev., was attended with much success, and o. quantity |  | | Report (issue) | | Physical Characteristics of Commercial Sheet Muscovite in the Southeastern United States GEOLOGICAL SURVEY...under a cooperative agreement with the State of North Carolina and the Tennessee Valley Authority Physical... Physical Characteristics of Commercial Sheet Muscovite in the Southeastern United States By RICHARD H. JAHNS...under a cooperative agreement with the State of North Carolina and the Tennessee Falley Authority UNITED...6 7 8 11 12 12 15 16 16 17 17 22 24 26 Sheet muscovite in the Southeastern States.____________ Distribution |  | | Journal (article/letter/editorial) | | Co.). Micaceous materials included biotite and muscovite from Wards; illite from the Blaylock formation...(courtesy J. E. Dolcater); montmorillonitic soil from Brawley, C A , a diatomaceous earth from Arizona (courtesy...the H2TiF6 treatment. Muscovite (20-5 p.) and the montmorillonitic soil (Brawley, *This observation suggested...Na-bentonite, SD Na-bentonite, WY Montmorillonitic soil Brawley, CA Illite, Beavers Bend, OK Verm.-smect.-phlog...residue of several kaolinites was thought to be muscovite on the basis of its resistance to H2TiF6 (discussed |  | | Report (issue) | | PHANEROZOIC KJlg 5 Rang MESOZOIC JURASSIC 33° Brawley M C MESOZOIC AND (OR) PROTEROZOIC gn sa...gravelly sand, locally fossiliferous; likely part of Brawley Formation KJlg KJog Tb Td Ta Tvs Tso Basalt...rocks in the southern Chocolate Mountains just north of Highway 78 have yielded 40Ar-39Ar dates of 25... Occurs in swarm of orange-weathering dikes at north end of Chocolate Mountains Pyroxene dacite—Flow-banded...sedimentary and (or) volcanic strata. The first unit, muscovite-quartzfeldspar phyllite, crops out sparsely in |  | | Journal (issue) | | December, 1973 A FIELD GUIDE 10 INSECTS of America North of Mexico by Donald J. Borror and Richard E. White...comprehensive, authoritative and up-to-cate guide to North American insects ever published. It covers 579 families...Medicine Man, Nochalo. The legend tells that when the north wind rang the bell, it so frightened the evil spirits...of the locality. They also worked their rich gold mine. When Geronimo, Nino's mother's brother visited...rattlesnake group might well have evolved on the North American continent at the time when heavy hoofed |  | Wilkinson, W., Wendt, C., Wilkins, J., Haxel, G. (1986, March) Frontiers in geology and ore deposits of Arizona and the southwest, Field Trip Guidebook 3 - Precious metal mineralization, stratigraphy, and tectonics in southeastern California - Part A. Guidebook. Arizona Geological Society | Report (issue) | | to vehicles. Lunch* Stop 2. Overview of Mesquite mine Stop 3. Cargo Muchacho Mountains-visits to American...Exposure of cataclastic ledge Stops 5 and 6. Picacho mine. Lunch* between stops Depart for Tucson Arrive in...possible, bring hard hat and safety glasses for mine FIELD TRIP 3 PRECIOUS-METAL MINERALIZATION, STRATIGRAPHY...structural control of Au mineralization in the Picacho mine. Recent successes by exploration geologists from...made at Gold Fields Mining Corporation ' s Mesquite mine where Wendt and Wilkinson will lead an informal |  | | Report (issue) | | Central group ____________________________ _ _ Carolina gneiss ________________________ _ Mica schist...__________________________________ _ ~ orth Carolina and South Carolina ______ ____ _ Georgia ______________...34 35 35 36 39 44 44 45 46 47 47 49 49 50 50 Mine descriptions ___________ --------- -- .. -------...___ _______________________ _______ _ Fauquier County ____ ______ ______ _____ _____ _ Franklin ____...properties _________ .. _____________ _ Halifax County ______ - _____ - __________ ~- _'- __ _ Virgilina |  | | Journal (article/letter/editorial) | | Borrego formation and a Pleistocene age for the Brawley formation. CONTENTS Introduction and acknowledgments...lake, as might have been expected, but toward the north, where the lake is narrow. Roughly 277 feet below...along the axis of the basin, especially to the north where Whitewater Creek enters the lake, and to the...January average July average Maximum Minimum Brawley Calexico Imperial Indio 52.7 53.2 53.6 54.2 91...(west to northwest) and 16-31 knots 50% from the north to west >31 knots quadrant 42% days < 3 knots |  | | Book | | INTERSTATE 10: BEAUMONT—INDIO 133 CA 86: CoaCHELLA—BrawLey 140 CA 111: Catexico—Mecca 144 PENINSULAR RANGES...and appropriate. Post miles give mileage on a per-county basis. Some counties place post mile signs only...given county. Mileage increases eastward or northward and then restarts at 0 at the next county line....is Santa Barbara County; 29.00 is highway mileage from the south boundary of the county. Post miles are...Transverse western of San Onofre Pacific between North and Plates American | Breccia displacement transform |  | | Journal (article/letter/editorial) | | subduction of oceanic crust beneath the western coast of North America. In the northern Great Basin, most of the...volcanic arc that formed along the western coast of North America between about 22 to 4 Ma. By contrast, the...gold-silver deposits in the northern Great Basin (north of latitude 37°30'N). The focus is on variations...the northern Nevada rift. The heavy star at the north end of the rift is the McDermitt caldera (M) and...Farallon plate that was being subducted beneath North America) at the different times indicated. Shaded |  | | Journal (article/letter/editorial) | | GoldFieldsOperating Company, 6502EastHighway78,Brawley,California 92227-9306 AND RICHARD M. TOSDAL U...on the south with the Chocolate Mountains on the north. piedmontflanksof the ChocolateMountains,which Gneissunitsin...southernCaliforniacutby numerous, but now-inac- unitconsists of muscovite schistandgneiss thatgrade tive,strands ofthe ...y. SeeFigurelB for location. Coarse-grained muscovite graniteintrudesthegneiss as stocksand sills. Mildly...earlyTertiaryage(Haxelet al., 1985). Still farther north, northwest, and northeast and acrosswesterlyto |  | | Book (volume) | | NORTInHIwo AME A Volumes John Sinkankas _ GEMSTONES OF NORTH AMERICA In Two Volumes ® Volume I Gemstones, of...of all the mineral treasures to be found in North America, are perhaps the most fascinating—and the...worthy of the name. Some, like the emeralds of North Carolina, the colorful and fabulous tourmalines and...above all, easily read and understood, GEMSTONES OF NORTH AMERICA, Volumes I and II, will be welcomed as a...abroad are becoming so scarce and expensive that North America has developed into a major exporter rather |  | | Journal (issue) | | Annual Imperial County Fair, County Fair Grounds, Imperial, California. March 3-6—Pima County Fair, Tucson...Chandler, Arizona. March 5—All-day trip to Asbestos Mine in Pinyon Flats. Meet at Palm Springs Desert Museum...laughed at him and tried to explain that an iron mine had no value in the West, but Mr. Barnes was not...idea to sell to Harriman. The ownership of this mine might be used as a lever to bring down the price...interest in the steel industry, Eagle mountain iron mine is a surface deposit and this wagon drill is one |  | | Report (issue) | | sissippi ____________________________ _ ~orth Carolina ------------------------South Car&ina -------...Geotechnical and geohydrological studies in Fairfax County, Virginia _________ _ Connecticut Valley Urban...l cooperators ----------~------------- State, county, and local cooperators ---------Other cooperators...moderate to intense deformation along or near major north- to northeast-trending, steeply dipping faults,... 16 km to the west, which occurs along a major north- to northwest-trending shear zone, and suggests |  | | Journal (volume) | | Mineral Resources GEOLOGIC BRANCH of Sierra County 7 68 Current Notes 68 SPECIAL ARTICLES 69...classes 1. Mines and mineral resources of a given county or area (describing kind, character, distribution...DISTRICT MINES AND MINERAL RESOURCES OF SIERRA COUNTY By Charles V. Averill, District Mining Engineer...SIERRA COUNTY, WITH REFERENCES TO REPORTS OF STATE MINERALOGIST 50 GEOGRAPHY Sierra County is one of...Sierra Nevada continues through Plumas County, which adjoins to the north, but ends just beyond. Deep can- |  | | Report (issue) | | ____________ Kentucky _____________ North Carolina-South Carolina-GeorgiaAlabama________________________...investigations Continued Southeastern region -Continued North Carolina ___________. Tennessee ______________. Central...Montana ____________________________ New Mexico______ North Dakota ____ Oklahoma _______ Western region Multistate...INVESTIGATIONS Mineral-resource potential of the North Harpers Creek and Lost Cove RARE II areas Geochemical...thorium, niobium, and fluorine are widespread in the North Harpers Creek and Lost Cove RARE II areas. The sources |  | | Report (volume) | | ____________ Kentucky _____________ North Carolina-South Carolina-GeorgiaAlabama________________________...investigations Continued Southeastern region -Continued North Carolina ___________. Tennessee ______________. Central...Montana ____________________________ New Mexico______ North Dakota ____ Oklahoma _______ Western region Multistate...INVESTIGATIONS Mineral-resource potential of the North Harpers Creek and Lost Cove RARE II areas Geochemical...thorium, niobium, and fluorine are widespread in the North Harpers Creek and Lost Cove RARE II areas. The sources |  | | Journal (article/letter/editorial) | | Elmore 1, Salton Sea Geothermal Field, California, USA S. Douglas McDowell and Wilfred A. Elders Institute...among detrital (allogenic) biotite, chlorite, and muscovite, and authigenic illite and chlorite, occur in...Technological University, Houghton, Michigan 49931, USA Biotite appears, and calcite disappears, at a temperature...sedimentary piles such as that found in the Gulf Coast of North America (Hower et al. 1976; Weaver and Beck 1971...well as coarser grained biotite, chlorite and muscovite. The gross stratigraphy of most of the boreholes |  | | Journal (issue) | | . . . . . . . . . . . . 370 Notes On a New Gold Mine and Flotation Mill Near Washington, D. C. By Dr...overcoat was unnecessary during the day. The cryol1te mine is a great open pit perhaps a hundred and fifty...at the bottom are two steam shovels to load the mine cars that go out through a tunnel and so reach the...top of the shaft which is the only entrance to the mine is a hundred feet or so from the edge of the pit...great pit is so close to shore that they actually mine cryolite under the sea. The floor of the pit itself |  | | Book (edition) | | forms a very small industry at Brandon in Suffolk County. Grindstones and Pulpstones. The production of...350 5,323 Minnesota, 140,290 103,180 113,138 North C arolina, Beach pebbles, artifuiully rounile...manufactiirod from quartzite and granite in Minnesota, North (’arolina, Wisc«)nsin, and Soutli Dakota. Millstones...small way. limited output fi oin Minnesota and North ('arolina \s licu e gi anitc^ is Chaser stones...principally in the vicinity of Hot Springs, Garland County, are of two varieties: Arkansas stone, which is |
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