 | | Report (issue) | | Deposits in Serpentine Rocks Of the Piedmont Upland Maryland, Pennsylvania And Delaware By NANCY C. PEARRE...districts ______ -._-_____-_____-___._. Montgomery County, Md_-_-_---_---_-_-----------_-__--_-_-_Soldiers...descriptions_______________________________________ Montgomery County, Md___-_______________________.__ Etchison mine_____-_-...chromite mine. Index map of the Piedmont Upland, Maryland, Pennsylvania, Page and Delaware__.__________...and small building-stone quarries in serpentine, Maryland and Pennsylvania__________________ 2. Production |  | | Journal (article/letter/editorial) | | lherzolite (Fig. 1) consisting of forsterite, enstatite, diopside, and plagioclase, with minor spinel...fluor-hydroxyl-apatite have been found in Georgia and Maryland of the U.S.A., associated with chlorite-talc schists...magnetite, apatite, and ilmenite is present in Harford County, Maryland. The central part of the ultramafic body...found with ultramafic rocks in Georgia and Harford County, Maryland (Mitchell et al. 1943; Southwick 1968)...and Valetine, L.B. (1970) Rutile in the Harford Country, Maryland, serpentine belt. U.S. Geological Survey |  | | Journal (article/letter/editorial) | | SEPTEMBER 1951 PETROLOGY OF THE BALTIMORE GABBRO, MARYLAND BY NORMAN HERZ ABSTRACT The Baltimore gabbro,...chamber are discussed. Differentiation trends of Maryland rocks show absolute enrichment in iron throughout...992 993 995 980 NORMAN HERZ—BALTIMORE GABBRO, MARYLAND Figure Page 13. Statistical diagrams 1003 14...complex.... 1008 15. Differentiation trend of Maryland rocks.. 1011 16. Deuteric and hydrothermal effects...the Piedmont of Baltimore City and County and Howard County of Maryland. No worker has seriously re-examined |  | | Report (issue) | | ___________ Clinochrysotile (Globe-type), Gila County, Ariz___________________________________________...Clinoehrysotile (iron-bearing serpentine), Stillwater County, Mont_________________________ Clinochrysotile...Forest Hill, Harford County, Md____________________ Clinochrysotile and lizardite, Morris County, N.J____...Clinochrysotile and lizardite, variant form, Morris County, N.J.____________________________ Lizardite plus...section___________-___ Lizardite (deweylite), Delaware County, Pa__-___________-_____________-_---__---__--_-Lizardite |  | | Report (issue) | | CHROME ORES OF SOUTHEASTERN PENNSYLVANIA AND MARYLAND. By ELEANORA BLISS KNOPF. INTRODUCTION. Chromite...the eastern part of Maryland. Deposits of commercial importance lie along the Maryland-Pennsylvania State...Rising Sun, Cecil County, Md. Another deposit that has been recently worked is in Maryland in the Soldiers...Piedmont district of eastern Pennsylvania and Maryland, in which the chromite deposits are situated,...belt of Pennsylvania and Maryland and of the Soldiers Delight deposit in Maryland. At that time no mines |  | | Journal (article/letter/editorial) | | isolatedpocketsor "pots" as illustrated at BareHills,Maryland, andHestmand½, Norway,to larger massescontainingmany...Johannsen,Albert, "The Serpentines of Harford County, Maryland," Md. Geol. Surv. x2, x928, p. 242. ORIGIN...arrangementof the fibers or plaices suggests enstatite astheoriginal mineral. Chrysotile.--This is the...essential minerals of the fresh rocks are olivine and enstatite in varyingproportions. ,41aska.--Chromiteoccursas...the fractures of olivine and in the cleavagesof enstatite,and acrossthe cleavagesof the deuteric minerals |  | | Journal (article/letter/editorial) | | barrels on a farmer's cart led Tyson to the rich Harford County (Md.) deposits. He then prospected the area...biogeochemical prospecting. Deposits, mostly in Maryland and Pennsyl vania, served the world's needs for...with lighter kaemmererite. Bare Hills, Baltimore County, Md. Author's collection. 170 ROCKS AND MINERALS...pyroxentite or peridotite minerals, such as olivine or enstatite. In weathered ores, the gangue is usually talc...have been found in the U . S. at Franklin, Macon County, North Carolina. Green color: Beryl. Beryl with |  | | Report (issue) | | serpentine-group minerals from Norway, California, Maryland, and England.________________ 96 98 100 102 ...(alteration product of pyroxene) from Montville, Morris County, N".J. B, Dark-green serpentine from the well-known...Montville, Morris County, N.J. B. Dark-green serpentine, Newburyport, Essex County, Mass. C. Silky, fibrous...Montville, Morris County, N.J. D. Grayish-green picrolite, Culakenee mine, Buck Creek, Clay County, N.C. E. Grayish-green...Grayish-green serpentine, Corundum Hill, Macon County, N.C. Interpretation of Faust and Nagy Chiefly |  | | Journal (article/letter/editorial) | | Two new occurrences have been found, cherokee county, Georgia, and von der Rossa, val Devero, rtaly...serpentine quarry near Holly Springs, Cherokee County, Georgia, exhibits only a small number of forms...l1,T:;*1,:::n"' data obtained on the Cherokee County, Georgia, material. It could not be a mixture of...serpentine quarry near Holly Springs, Cherokee County, Georgia. ap:apatite (hydroxylapatite), t:ialc...at one atmospherepressure talc dissociatesinto enstatite, a silica rich liquid, and water vapor beAs was |  | | Journal (article/letter/editorial) | | componentsin the formula not on the binary join enstatite-ferrosilite.Seifert definesa non-confg(2) urational...samples HC, separated from a pyroxenite from Harford County, Maryland, rninor chromite, anthophyllite, Sample:...oxygens. to be as close to binary mixtures of enstatite and fer- 968 BESANCON: DISORDERING IN ORTHOPYROXENES |  | | Journal (article/letter/editorial) | | of Maine, 110 Boardman Hall, Orono, Maine 04469, USA Off)~rint requests to." E.S. Grew * Present address...(Cdm) beyond Izo is also metastable relative to enstatite (Seifert 1975). Square and round brackets enclose...andalusite (And), boron-bearing kornerupine (B-Krn), enstatite (En), and orthoamphibole (Oam) Discussion Hoegbomite...intersected by quartz veins at Cortlandt, New York, USA, but he does not explicitly state that hoegbomite...and Benson Mines in Ontario, Canada, and New York, USA, respectively (Marcotty et al. 1982). However, there |  | | Report (volume) | | Clay County. Macon County. Jackson County. Transylvania County. Swain County. Haywood County. Buncombe...Buncombe County . Madison County. Yancey County. Mitchell County . Watauga County . Wilkes County. Ashe County...County . Alleghany County . Physiography and ecology of the peridotites. 28 28 29 32 34 35 36 38 42 46...mag¬ nesian rocks. Shooting Creek region, Clay County, North Carolina. Elf dunite. Elf amphibole-peridotite...amphibolite near Marshall. Peridosteatite at the Madison County Home. Peridotites on Ivy River. Carter mine dunite |  | | Journal (article/letter/editorial) | | between Lafayette and Spring Mills. In Cecil county, Maryland, the Baltim ore gneiss occurs in a narrow...Port Deposit. I t expands southwestward in Harford county. Character of the formation and stratigraphic...sectio n so u th o f S p rin g m ill, M ontgom ery county, P e n n sy lv an ia. P h o to g rap h e d by...stratigraphically continuous with the Baltim ore gneiss of Maryland, sim ilar stratigraphic relations, like lithologic...mile south o f W illow Grove, station, Montgomery county, P en n sylvania. Analyses made by F. A. Genth |  | | Journal (article/letter/editorial) | | hdgbomiteis McKie's (1963) skarn, hdgbomite-chlorite-enstatite-tremolite-dolomite whereas examples of secondaryhdgbomite...apatite-bearingultramafic chlonte rock, Harford County, Maryland. U S GeologicalSurvey ProfessionalPaper |  | | Journal (article/letter/editorial) | | U' S. Department of Agriculture, Beltsville, Maryland. Suretary: C. S. Hurlbut, Jr., Harvard University...Gabriel, Alton, U. S. Bureau of Mines, College Park, Maryland. Hafi, John C., Colorado School of Mines, Golden...of the series were lormed at Hobart Butte, Lane County, Oregon, probably in Miocene time by hydrothermal...these conclusions are given for the Woodstock, Maryland, granite as a.nalyzed by the writer on the Hurlbut...CONCRETIONS FROM PITTSBI'RGH COAI SEAM' MONONGALIA COUNTY, WEST VIRGINIA WII-DERD. FOSTERAND IIORENCE L. |  | | Book (volume) | | Dahlonega Co. and Rabum Co., and the McDuffie County Belt extending through portions of McDuffie, Warren...Sphalerite. BALDWIN COUNTY MILLEDGEVILLE, at state farmjasper. BANKS COUNTY COMMERCE, along Hwy. 59...along adjoining Co. linerock crystal. BARROW COUNTY WINDER, along rd. to Jefferson and 1½ mi. inside...Guide for Rock Hounds in the United States BARTOW COUNTY AREA, Saltpeter Cave, as floatjasper. CARTERSVILLE:...agate, (banded, various colors), jasper. BIBB COUNTY MACON: at Holton Quarry, 7½ mi. NWagate; N |  | | Report (issue) | | ...........................................96 Maryland ................................................Arkansas, Alabama, Georgia, North Carolina, Virginia, Maryland, Pennsylvania, Massachusetts, Vermont, and New...principally for dimension stone uses. Talc production in Maryland has been from various serpentinite bodies present...altered serpentinite and are similar to those in Maryland. Deposits in Middle Proterozoic dolomitic marble...this report on Virginia, District of Columbia, Maryland, and Pennsylvania contain much input supplied |  | | Report (issue) | | and F. F. Wright___________ Rutile in the Harford County, Md., serpentinite belt, by Norman Herz and...Valentine________________________ Phosphate occurrences in Nye County and adjacent areas, Nevada, by C. L. Rogers, F...1{-Ar ages of lamprophyre dikes near Great Falls, Maryland-Virginia, by J. C. Reed, Jr., R. F. Marvin, and...quality of selected streams in southern Nassau County, Long Island, N.Y., by Ellis Koch __ C189 Use of...them in many of the counties: R. R. Coats, Elko County; RonThis paper Is a somewhat revised version of |  | | Book (volume) | | 600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |  | | Book (volume) | | 600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravels⎯agate, jasper, rare...⎯agate, jasper; d RR siding of Clay⎯agate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...E, regional deposits⎯Siderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip...mine⎯pyritized gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason |  | | Report (volume) | | sulphate......................................... Enstatite and cupric sulphate.............................Delaware County, Pa., through Foote & Co. Orthoclase A and orthoclase B were from San Diego County, Cal....much as 0.0584 gram. Orthoclase from San Diego County, Cal., ground for four hours, precipitated 0.0268...conditions being the same. Orthoclase from Delaware County, Pa., precipitated 0.0469 gram copper; ground a...SULPHATE. Experiments. Orthoclase A (from San Diego County, Cal.), containing 11.98 per cent K20, 3.32 per |  | | Report (volume) | | ............................................. Maryland.................................................See Bauxite and Halloysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities : Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20 S., R. 7 E.;...; Jefferson County, at Ely ton; Lee County, at Chewacla lime works"; St. Clair County, at Greensport; |  | | Book | | 1953 THE PORTER CHEMICAL COMPANY Hagerstown, Maryland -•-0-•-0-•-0-•-0-•-0-•-0-•-0-• ◄ HOW TO USE THIS...Pyroxenes 91 Pyco,c~m:s - ---------------------EnStatite -----------------------Bronzite -------------..._________________ 69 Dolomite -----------------------70 Enstatite -----------------------95 ~asnesjte asnet1te...boxes. THE PORTER CHEMICAL COMPANY Hagerstown, Maryland USE OF APPARATUS MEASURING ( CHEMICALS •••...Survey) Chester County, Pa.: Alabama; Texas; Montana: Humbolt County, Nevada; Beaver County, Utah; Loudon |  | | Book | | Pennsylvania___ _ _ _ 1 _ 2 _ 2 1 CHAPTER 4 Maryland ... 3 CHAPTER 5 Virginia 4 1 CHAPTER 6 West...n g y e l l o w " c o l o r " i n y o u r pan. Maryland: M o n t g o m e r y, Frederick, H o w a r d ...n d a n assortment o f fossils. Photograph b y Maryland Board o f Natural Resources. 2 K e n t u c k...dollars at the noted locality of Cowee Valley, Macon County, North Carolina. An enthusiastic family found and...visited the well known old Rutherford mine in Amelia County, Virginia, and found bright spessartine garnets |  | | Book | | The Khombic Pyroxenes. 27. Fluorite. 5 5 a. Enstatite (Bronzite). 28. Graphite. 6. Hypersthene. ...affected very largely by the percentages of iron. Enstatite is the theoretically pure magnesian silicate of...contains from 10 to 25% of ferric oxide. Both enstatite and hypersthene are common constituents of basic...such as the gabbros, norites, and peridotites. Enstatite is also a common constituent of meteorites...structure of (1) granite from Sullivan, Hancock County, Maine, (2) micropegmatite from Mount Desert, Maine |
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