 | | Journal (article/letter/editorial) | | personal communication. RUTILE IN HARFORD COUNTY, MARYLAND W. Hanoro Tour,rNsow, Springf.eld.,pennsylvania...pennsylvania. On the geologicalmap of Harford County, published by the Maryland Geological Survey, there is shown...this rutile-bearing formation, large bodies of hypersthene gabbro which grade into pyroxenite. Ilmenite... Watson (BulI. LllA, Va. Geol,.Sura.). The Harford County rock differs from hornblende nelsonite as described |  | | Journal (article/letter/editorial) | | personal communication. RUTILE IN HARFORD COUNTY, MARYLAND W. Hanoro Tour,rNsow, Springf.eld.,pennsylvania...pennsylvania. On the geologicalmap of Harford County, published by the Maryland Geological Survey, there is shown...this rutile-bearing formation, large bodies of hypersthene gabbro which grade into pyroxenite. Ilmenite... Watson (BulI. LllA, Va. Geol,.Sura.). The Harford County rock differs from hornblende nelsonite as described |  | | 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) | | the cross-section made of them by the state of Maryland. The land area of the state may be set down in...eastern half of the state, there spreads out in Maryland an expanse of high, but nearly level, country...its.— Topographically, the Fiedmont plateau in Maryland may be considered to begin at the eastern base...Catoctin. It would bound the Piedmont area of Maryland on the west topographically as it does geologically...the Piedmont reigon proper within the limits of Maryland as a trapezium, bounded on the north by the state |  | | Book | | UNIVERSITY MARYLAND F, J. PETTIJOHN JOHNS HOPKINS BALTIMORE, UNIVERSITY MARYLAND J. C., REED...COLORADO and KENNETH MARYLAND BALTIMORE, N. WEAVER GEOLOGICAL SURVEY MARYLAND INTERSCIENCE PUBLISHERS...OWENS, James P., 14528 Bauer Drive, Rockville, Maryland 20853. PETTIJOHN, RANKIN, DOE, Bruce, Isotope...Department of Geology, Johns Hopkins University, Maryland 21218. Doucias Baltimore, W., Eastern States...Geology, Johns Hopkins University, Baltimore, Maryland 21218. GWINN, Vinton E., Department of Geology |  | | Journal (article/letter/editorial) | | non-pelitic rocks there contain futile only in the hypersthene zone. The slight difference in behavior of futile...metamorphic zones ranging from staurolite to hypersthene, rutile is lacking in rocks below the kyanite...increasingly abundant in the sillimanite and hypersthene zones (Fig. i). Rutile is present in a greater...greater number of different rock types in the hypersthene zone of the granulite facies than in the kyanite...amphibolites in the hypersthene zone contain rutile, whereas amphibolites below the hypersthene isograd contain |  | | 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 |  | | Journal (article/letter/editorial) | | epidiorite) --hornblende-schist complex of Baltimore, Maryland, U.S.A., presents many points of similarity to...presence of schiller inclusions in the augite and hypersthene of the gabbro. The hornblendic rocks (gabbro-diorites)...Knopf and Jonas ascribe the alteration of the hypersthene-gabbro to regional dynamic metamorphism. T6rnebohm...refers to schiller inclusions in the augite, hypersthene, and olivine. The hyperite is said to be changed...and associated intrusive rocks of Harford County, Maryland. Maryland Geol. Survey, vol. 12, pp. 289-332 |  | | 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. |  | | 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...the StateLine serpentinebelt of Pennsylvaniaand Maryland were saxonires,dunites,wehrlitesand websterites...specimensfrom SextonPeak, Josephine County,and from Mormon Basin, Baker County, leadshim to the conclusionthat...OF CHROMITE DEPOSITS. 705 with enstatiteor hypersthene rocks (now serpentinized)and anorthosites. There |  | | Journal (article/letter/editorial) | | ....................... 309 Gabbro (gabbro, hypersthene-gabbro, norite, meta-gabbro)...................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 |  | | Report (volume) | | MARYLAND GEOLOGICAL SURVEY VOLUME ONE MARYLAND GEOLOGICAL SURVEY VOLUME ONE BALTIMORE THE JOHNS... President. GOVERNOR OF MARYLAND. KOBEKT P. GRAHAM, COMPTROLLER OP MARYLAND. DAKLEL C. GILMAN, ....... R. W. SILVESTER, Secretary. PRESIDENT OF THE MARYLAND AGRICULTURAL COLLEGE. STATE GEOLOGIST WM. BULLOCK...Excellency Lloyd Lowndes, Governor of the State of Maryland and President of the Geological Survey Commission...Miscellaneous Products 87 The Detailed Study of County Resources 87 The Special Investigation of Road |  | | Journal (article/letter/editorial) | | GENESIS OF URBAIN, THE ILMENITE COUNTY DEPOSITS CHARLEVOIX, OF ST. QUEBEC. JOSEPH L. GILLSON...TIFF.ilmenitedepositsof the St. Urbain district, County Charlevoix, Quebec,lie aboutsevenmilesnorth of...•-Mawdsley, J. B.: St. Urbain Area, Charlevoix County, Quebec. Can. Geol. Surv., Mere. i52, i927. 3 Dulieux...per cent.of orthoclase. The remic mineralsare hypersthene,hornblende,and biotite. Zircon and apatitewere...The Petrography of the Pioche District, Lincoln County, Nevada. U'. S. Geol. Surv. Prof. Paper x58, pp |  | | Report (issue) | | (Pavlides and others, 1980). The Peach Bottom Slate in Maryland may correlate with the Arvonia Slate and Quantico...regards the True Blue as part of Laurentia. From Maryland north, the Potomac terrane has been thrust onto...(turbidite-ophiolitic melange; Drake, 1986). From the Maryland-Pennsylvania border to northern Virginia, each...is overlain and interpreted to be overlapped in Maryland by the Peach Bottom Slate, which although not...olivine pyroxenite. The bulk of the mafic rocks is hypersthene gabbro. Norite and olivine gabbro are much less |  | | Report (issue) | | evolution of the Baltimore Gneiss anticlines, Maryland Peter D. Muller and David A. Chapin Southern and...near Philadelphia; the Baltimore Gneiss domes of Maryland; and the Sauras Massif of North Carolina. Still...charnockitic affinity, with hornblende, augite, hypersthene, magnetite, and garnet at highest metamorphic...proportions, along with local kyanite, spinel, hypersthene, pyrite, and magnetite, which locally form up...Interbeds of amphibolite, quartzite, augite-hypersthene-hornblende-biotite-quartz-plagioclase-gneiss |  | | Report (issue) | | Peninsula, New Jersey, Pennsylvania, Delaware, and Maryland By JAMES P. OWENS and JAMES P. MINARD SURFACE...peninsula, New Jersey, Pennsylvania, Delaware, and Maryland. (Geological Survey professional paper ; 1067-D)...PENINSULA NEW JERSEY, PENNSYLVANIA, DELAWARE, AND MARYLAND By JAMES P. OWENS and JAMES P. MINARD ABSTRACT...age that fringe much of the southern Delaware-Maryland tween Trenton and South Amboy is locally very...Schlee, 1957, on the gravelly sediments in southern Maryland), or a vectoral mean (used by Jordan, 1964, in |  | | Report (issue) | | .................................. 12 Cape May County.................................................................................. 12 Cumberland County.................................................................................... 12 Atlantic County....................................................................................... 14 Ocean County.................................................................................... 14 Monmouth County............................................... |  | | Report (issue) | | biotite in some gneisses from Mason Mountain, Macon County, N.C --------------------8. ~mong minerals of some...__ _ W age.r and Mitchell (1951, p. 142). Hypersthene Olivine Plagioclase .93 28.5 21.5 48.0 25...e-graphite gneisses from Mason Mountain, Macon County, N.C. TABLE [Mineral percentage established by...(0.99) Quartz K-feldst>ar Plagioclase Garnet HYPersthene Biotite .03 .30 "Ores" Charnockite 4639 (0...(0.31) ------ Quartz K-feldspar Plagioclase Hypersthene "Ores" Quartz K-feldspar Garnet "Ores" 20 14 |  | | Journal (article/letter/editorial) | | Institute of Standards and Technology, Gaithersburg, Maryland 20899, U.S.A. 2 Laboratory for Mineral Deposits...Department of Geology, University of Maryland, College Park, Maryland 20742, U.S.A. ABSTRACT Unit-cell...(source = Smithsonian, J. Nelen) and Johnstown hypersthene (Cr) (source = Smithsonian, J. Nelen). The concentrations...Marriottsville Quarry, Cockeysville Formation, Carroll County, MD Quebec Balmat, NY Easton, PA St. Lawrence Co...Gooderham, Ontaria Jenkins Farm near Pylesville, Harford County, MD CA Shinness Loch Shin, NW Lairg, Ross and |  | | Report (issue) | | geol·ogy Occurrence of refractory clay in Randolph County, W.Va., by K. J. Englund and H. J. Goett______________________...and apatite-bearing ultramafic chlorite rock, Harford County, Md., by D. L. Southwick_______ Quartz diorite-quartz...Formation (Paleocene) in southeastern Hardeman County, Tenn., by S. M. Herrick and D. R. Rima-------...Formation in the Alvord ~ountain area, San Bernardino County, Calif., by G. E. Lewis-----------------------...1968 OCCURRENCE OF REFRACTORY CLAY IN RANDOLPH COUNTY, WEST VIRGINIA By KENNETH j. ENGLUND and HARRY |  | | Book | | 1953 THE PORTER CHEMICAL COMPANY Hagerstown, Maryland -•-0-•-0-•-0-•-0-•-0-•-0-•-0-• ◄ HOW TO USE THIS...60 114 100 lee _____________________________ Hypersthene --------------------- 53 ~ Iceland Spar --...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...~unty, Virginia; Wake County, North Carolina; Albany County, Wyommg; and Kern County, California. Natural |  | | 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 |  | | 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 |  | | Report (issue) | | GEOLOGIC RADON POTENTIAL OF EPA REGION 3 Delaware Maryland Pennsylvania Virginia West Virginia OPEN-FILE...GEOLOGIC RADON POTENTIAL OF EPA REGION 3 Delaware, Maryland, Pennsylvania, Virginia, and West Virginia R...Preliminary Geologic Radon Potential Assessment of Maryland Linda C.S. Gundersen 73 5. Preliminary Geologic...aerial radioactivity, and indoor radon data by county. Because of constraints on the scales of maps presented...The reports are available in county formats and State summaries. The county reports typically contain both |  | | Book | | Enstatite (Bronzite). 28. Graphite. 6. Hypersthene. 29. The Micas. Chalcedony. 16. Opal. 1 c...10 to 25% of ferric oxide. Both enstatite and hypersthene are common constituents of basic igneous rocks...structure of (1) granite from Sullivan, Hancock County, Maine, (2) micropegmatite from Mount Desert, Maine...an ordinary syenite, (2) and that of Hastings County, Ontario. THE PHONOLITES Phonolite, from the...dacites; Hornblende andesites; Augite andesites; Hypersthene andesites; and Mica andesites. The glassy varieties |
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