 | | Report (volume) | | the James Run Gneiss and volcanic complex of Cecil County, Md. It may also be correlative with parts of...medium- to coarse-grained feldspathic biotite-muscovite gneiss containing scattered pebbles of quartz...hornblendes. chlorite, biotite, actinolite, and muscovite are the principal minerals (table 1). The felsic...composed of quartz, albite, biotite, chlorite, and muscovite with traces of carbonate. Located on Powells Creek...Piedmont in Maryland the James Run Gneiss in Baltimore and Harford Counties and the "Cecil County volcanic |  | | 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 relations...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 |  | | 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 |  | | Report (issue) | | from Pennsylvania southwest through Delaware to Maryland separating the Mt. Cuba Gneiss and the Wilmington...DGS; and Heather Quinn and William (Will) Junkin, Maryland Geological Survey. I acknowledge and thank Lillian...Rosemont Shear Zone southwest through Delaware to Maryland separating the West Grove Metamorphic CHANGING...the northwest from the Christina River to the Maryland State Line. Petrographic data for many of these...extending from northeast of Philadelphia southwest to Maryland the Wissahickon Schist after outcrops exposed |  | | Report (volume) | | 1977 UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D •. ANDRUS, Secretar11 GEOLOGICAL SURVEY V. E...members of the James Run Formation, Cecil County, northeastern Maryland, by Michael W. Higgins ---------------------The...---------------------The Baltimore Complex, Maryland and Pennsylvania, by Michael W. Higgins ----------------...Cretaceous) to replace the Monmouth Formation in Maryland, by James P. Minard, Norman F. Sohl, and James...in Arizona -----Generalized geologic map of Cecil County, Md., showing members of the James Run Formation |  | | Report (volume) | | CHAPTER II. GRANITES OP MARYLAND ...................................... The Maryland Piedmont region.......102395 4 CONTENTS. CHAPTER II. GRANITES OF MARYLAND Continued. PageScientific discussion Continued......... 51 Baltimore County .................................... 51 Howard County........................................................ Light-gray muscovite granite of the Fredericksburg area........ Dark......... Chesterfield County (south of James River)................ Henrico County (north of James River) |  | | Report (volume) | | Pennsylvania. Geology of the Piedmont upland in Maryland._.__.____.. Baltimore gneiss.._.___--__--_--__-_-_--_--__-_...Ferry-Quarryville district and adjoining region in Maryland and some of the igneous intrusions. Sketch map...Generalized topography of eastern Pennsylvania and Maryland at the end of the Honeybrook subcycle of erosion...Generalized topography of eastern Pennsylvania and Maryland at the end of the Harrisburg subcycle of erosion...Generalized topography of eastern Pennsylvania and Maryland at the end of the Bryn Mawr subcycle of erosion________ |  | | Report (volume) | | ................................. Androscoggin County............................................. Auburn......................................... Lincoln County ............................................................-...:.....-................. Oxford County........................;............................................................. Sagadahoc County.. '...... ............................................................................ Hartford County ..... ....................:............ ...... |  | | Report (issue) | | Mesozoic basins, gabbro of the Baltimore Complex of Maryland, melange zone, granitoid plutons, schist beneath...Chopawamsic Formation. The James Run Formation of Maryland is probably a northern lateral equivalent of the...and phyllite to staurolitic schist and biotite-muscovite garnetiferous schist in areas of increased metamorphism...38°21'57" N. and long 77°36'24" W. Metafelsite: muscovite-biotite-plagioclase-quartz porphyritic gneiss:...38°14'28" N. and long 77°44'55" W. Metafelsite: muscovite-plagioclase-quartz gneiss: Belmont Quadrangle |  | | Book (edition) | | mmed at Broken Arrow aud Trout creek, in Sc. Clair county. The strata in this field are more faulted und...prong of Canoe creek, in St. Clair county, to Ha\sop creek, in Bibb county, a distance of 60 miles. Down to...to Helena, in Shelby county, the field has an average width of 5 or 6 miles. Below that point the width...miles being in the latitud" of Blocton, in Bibb county. The south ern end of this field has a greater...Jefferson county; Helena, Montevallo, and Brierfield, Shelby county; and at Blocion. Bibb county. The Warrior |  | | Journal (article/letter/editorial) | | due to limonite, but in some degree is due to muscovite, and to secondary silica. The 'Continued from...prominent rocks of the series are biotite-schist, muscovite-schist, garnetiferous schist, vitreous quartzite...finds as a result of analyses that stone of Sussex county, N. J., are essentially both being magnesian limestones...facts showing that the white limestone of Sussex county is of Cambrian age, as follows; SGabbroson the...Provingthe CambrianAge of the White Limestonesof Sussex County,New Jersey,by F. L. NASON. Am. Geol.,Vol., XIV |  | | Report (volume) | | 147 N., R. 84 W., 4 km N of Riverdale, McLean County, N. Oak. Named for Aggie Brown Coulee, which flows...NW1/4NW1/4SW1/4SW1/4 sec. 17, T. 85 N., R. 7 W., Linn County, Iowa. A-L Peak Rhyolite Oligocene 1. New Mexico...structures in the San Mateo Mountains, Socorro County, New Mexico: New Mexico Geol. Soc. Spec. Pub. 5...Mountains, 10. sees. 33-35, T. 4 S., R. 6 W., Socorro County, N.Mex. Anapra Sandstone 1. Early Cretaceous 2...6. 7. 9. 10. at Cerro de Cristo Rey, Dofta Ana County, New Mexico, Appendix 2 in Lovejoy, E. M. P., Geology |  | | Journal (article/letter/editorial) | | North America; the rare earth pegmatitesb of Llano County (Texas), Minas Geraes(BraziI), Ytterby (Sweden)...A. L Genesis of mica pegmatite deposits, Latah County, Idaho: , Econ. Geology,vol. 28, no. 1, pp. 41-58...30Lovering, T. S., Magmatic chalcopyrite, Park County, Montana: Econ. Geology,vol 19, pp 636-640, 1924...Geology and mineral resources of eastern Cassia County, Idaho: Brill. Id.aho Bta. Mines ond.Geology,vol...NERALOGIST Rockport (Cape Ann), and western Hampden County. Types of pegmatite: Common granite and alkaline |  | | Report (issue) | | Howard, Baltimore, and Anne Arundel Counties, Maryland By Avery Ala Drake, Jr. 1 Open-File Report 98-757...HOWARD, BALTIMORE, AND ANNE ARUNDEL COUNTIES, MARYLAND by Avery Ala Drake, Jr. INTRODUCTION The Piedmont...largely in Howard County, Maryland. The northeasternmost part is in Baltimore County, Maryland and about 0...0.03 square miles is in Anne Arundel County. Most of the area is suburban and almost all outcrops are...Bromery (1968). REGIONAL GEOLOGY This part of the Maryland Piedmont is on the east limb of the Baltimore |  | | Journal (article/letter/editorial) | | sheet comprises the southwestern part of Macon county, with portions of Chariton and Randolph. The topography...deposit. H. B. K. The Granites of Cecil County in Northeastern Maryland. By G. PERRY GRIMSLEY. (Jour. Cin...feldspar crystal. The alteration of feldspar to muscovite is much less frequent than to epidote. The staurolitic...Geology of Benton County, by F. W. Simonds and T. C. Hopkins; and Geology of Dallas County, by C. E. Siebenthal...Siebenthal. The Dallas County report is accompanied by a topographic map, and contains a discussion of the |  | | Journal (article/letter/editorial) | | , Structural and petrologic studies in Duchess County, New York, Pt. II: G. S. A. Bulletin,47,775-850...includes the southern half of Chester County, all of Delaware County and parts of Philadelphia and Montgomery...schist of the Doe Run and Avondale region, Chester County, Pa.: U.S.G.S., ProJ. Paper 98-B (1916). 1r Swartz...with lhe Port Deposit granite, occurs along the Maryland state line in the extreme southern edge of the...Structure and age of the volcanic complex of Cecil County, Md.: Md.. Geotr.Swvey,13, l9l-213 (1937). Jonas |  | | Report (issue) | | Greneralized geologic map of part of Fairfax County, Virginia, and geologic map and section of the...Sedimentary melange in the northeastern part of Fairfax County, Virginia, contains both mesoscopic and mappable...precursory sedimentary melange in northern Virginia and Maryland. The fragments of Accotink Schist and Lake Barcroft...sedimentary melange in the area south of Fairfax County may form a tectonic motif beneath the Indian Run-Annandale...percursory melanges and motifs may occur in the Maryland Piedmont to the north. The tectonic setting of |  | | Report (volume) | | England. . . Maryland Geological Survey: vol. 4,1902; Garrett County, 1902; Cecil County, 1902. Baltimore... 1 Abbe (Cleveland, Jr.). [Maryland]. The physiography of Garrett County Md. Geol. Surv., Garrett Co...Describes .the topographic and drainage features of the county, and discusses its physiographic history. 2 Adams...Knoydart formation (Eq-Devonian) of Antigonish County, Nova Scotia. N. S. Inst. Sci., Trans., vol. 10...the NeoCarboniferous or Permian strata of Pictou County, Nova Scotia. Can. Mg. Rev., vol. 21, pp. 160-162 |  | | 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 |  | | Report (volume) | | Rouge. Maine............Mr. C. Vey Holman, Bangor. Maryland........ .Prof. E. B. Mathews, Johns Hopkins University...See Bauxite and Hallpysite. 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, Pv. 7 E.; Jefferson...Jefferson County, at Elyton; Lee County, at Chewacla lime works; St. Clair County, at Gfeensport; Shelby |  | | 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 |  | | Report (issue) | | Survey, jefEerson City. MARYLAND GEOLOGICAL VOLUME TWO SURVEY MARYLAND GEOLOGICAL SURVEY VOLUME...President. GOVERNOR OF MARYLAND. PHILLIPS LEE GOLDSBOROTJGH, COMPTROLLER OF MARYLAND. DANIEL C. GILMAN,...SILVESTER, ...... Seceetaey. PRESIDENT OF THE MARYLAND AGRICULTURAL COLLEGE. SCIENTIFIC STAFF Wm.... To His Excellency Lloyd Lowndes, Governor of Maryland and President of the Geological Survey Cominission...herewith the second volume of the reports of the Maryland Geological Survey. The several scientific articles |  | | 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) | | (Pavlides and others, 1980). The Peach Bottom Slate in Maryland may correlate with the Arvonia Slate and Quantico...sodium-rich and characterized by the mineral assemblage muscovite-paragonite-chloritoid. The terrane also contains...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 |  | | 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 |
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