 | | Report (volume) | | Geology of the Waterford Quadrangle, Virginia and Maryland, and the Virginia Part of the Point of Rocks Quadrangle...Ridge province and Culpeper basin in northern Virginia and Maryland UNITED STATES GOVERNMENT PRINTING...Geology of the Waterford quadrangle, Virginia and Maryland, and the Virginia part of the Point of Rocks quadrangle...references. Supt. of Docs. no.: I 19.3:2095 l. Geology-Virginia. 2. Geology-Maryland. I. Burton, William C. (William............................................. .. Loudoun Formation .................................... |  | | Report (issue) | | ^ Anne Arundel County 43 Baltimore County 45 Howard County - Montgomery County 88 Prince Georges...Georges County Virginia 74 . 120 129 Arlington County 129 Fairfax County 131 Fauquier County 139...139 Loudoun County 143 Prince William County 149 Diabase quarries of northern Virginia 155 CAPTIONS...forming a ridge north of Route 7 near Dranesville, Virginia. Figure 7. Locations of mineral deposits in...mines in the Soldiers Delight region, Baltimore County, Maryland. Adapted from Pearre and Heyl , 19.60 |  | | Report (issue) | | the cover—Turquois crystals from Lynch Station, Virginia; x ca.; pho tograph by Neal Ycdlin; color plates...C. A. Michael. COLD NUGGET FROM SPOTSYLVANIA COUNTY: Longest dimension approximately 13 cm., photograph...of Virginia R. V. DIETRICH* Professor of Geology and Associate Dean of Arts & Sciences, Virginia Polytechnic...Polytechnic Institute Research Division Bulletin 47 Virginia Polytechnic Institute, Blacksburg, Va. 24061 *... © R. V. Dietrich and the Research Division of Virginia Polytechnic Institute, 1970 Printed and bound |  | | Journal (article/letter/editorial) | | 1955 GEOLOGY OF CATOCTIN MOUNTAIN, MARYLAND AND VIRGINIA BY JOHN C. WHITAKER ABSTRACT Detailed mapping...of Catoctin Mountain in Maryland and northern Virginia indicates that the area is not a syncline as previously...revision of the stratigraphy. Strata mapped as Loudoun along the eastern border of Catoctin Mountain constitute...Cambrian-Precambrian boundary. .. 439 Introduction 456 Loudoun formation 441 Map pattern 457 General 441 Structure...Catoctin Mountain, Maryland and Virginia 435 2. Photomicrographs of Loudoun phyllite, Harpers phyllite, Tomstown |  | | Journal (issue) | | NOVEMBER 1992 VOL. 38 INTERESTING USES OF STONE IN VIRGINIA - PART I Harry W. Webb' and Palmer C. Sweet e...and soapstone have been or are being quarried in Virginia. Some 350 interesting uses of dimension stone...rock types quarried for dimension stone uses in Virginia include amphibolite schist, conglomerate, diabase...soapstone. The quarrying of most dimension stone in Virginia is uneconomical today because of the relatively...and uses of various types of dimension stone in Virginia. Architectural terms are defied in the Appendix |  | | Journal (article/letter/editorial) | | VIRGINIA MINES AND MINERALS By P H I L I P M O R R I L L East D e r r y , N . H . 0 3 0 4 1 (PART INTRODUCTION...mines in Virginia, north of the James River, with the ex ceptions as follows: Albemarle County was very...northern Virginia. Maps used were the U.S.G.S. Topo graphical Sheets. Also used were the county road maps...of H i g h w a y s Richmond, Virginia The price is 2 0 cents per county. Other states could well follow...very high grade iron. Credit should be given the Virginia Department of Mineral Resources in Charlottesville |  | | Report (volume) | | of the Harpers Ferry Quadrangle, Virginia, Maryland, and West Virginia Prepared in cooperation with the...Survey, the National Park Service, and the 1oudoun County Department of Environmental Resources Cover:...Harpers Ferry. West Virginia, from the Loudoun Heights trail on Blue Ridge in Virginia. Photograph taken...of the Harpers Ferry Quadrangle, Virginia, Maryland, and West Virginia By Scott Southworth and David K...Survey, the National Park Service, and the Loudoun County Department of Environmental Resources Structure |  | | Report (issue) | | JL / Culpfeper and B arbour sville Basins, Virginia and Maryland C7 ll.S. / PAPER Triassic-Jurassic...Stratigraphy of the Culpeper and Barboursville Basins, Virginia and Maryland By K.Y. LEE and AJ. FROELICH U.S...stratigraphy of the Culpeper and Barboursville basins, Virginia and Maryland. (U.S. Geological Survey professional...Geology Culpeper Basin (Va. and Md.) 4. Geology Virginia Barboursville Basin. I. Froelich, A.J. (Albert............................................. 16 Leesburg Member....................................... |  | Lyttle, Peter T., Aleinikoff, John N., Burton, William C., Crider, E. Allen, Drake, Avery A., Froelich, Albert J., Horton, J. Wright, Kasselas, Gregorios, Mixon, Robert B., McCartan, Lucy, Nelson, Arthur E., Newell, Wayne L., Pavlides, Louis, Powars, David S., Southworth, C. Scott, Weems, Robert E. (2017) Geologic map of the Washington West 30’ × 60’ quadrangle, Maryland, Virginia, and Washington D.C. Open-File Report 2017-1142. US Geological Survey doi:10.3133/ofr20171142 | Report (issue) | | 472±4 Ma 478±6 Ma Oo* Early Ordovician 483±9 Ma Mine Run Complex Oi O|po O|mIV O|mIII O|gu O|mII... Kps Jdl* Jdo Jmw Qtlp Qts Jd TKb Kpc Potomac Formation Kp Intrusive rocks Stratified and...Qbc Kp Qtlp af upper Paleocene Unconformity Potomac Formation Qts af Kps 58 55 33 Qal Qchow...Allen Crider Jr. (2012–2017) 8 10 KILOMETERS 9 VIRGINIA MAP LOCATION Tc Calvert and (or) Choptank Formations... Zircons from amphibolite on an island in the Potomac River yielded a 207Pb/206Pb crystallization age |  | | Journal (article/letter/editorial) | | Route 1 parallel the fall zone in northeastern Virginia. The rolling hills of the Piedmont, on the other...East or West of 1-95 between the Potomac and Rappahannock Rivers, Virginia natural history is truly for lovers...and pro ceed southward. LOG: From 1-95 at the Potomac River exit North onto G . Washington Memorial Park...(Washington West Quadrangle) This island retreat in the Potomac is a National Park wilderness preserve offering...called the Glenarm Series. The bluffs along the Potomac provide an excellent opportunity to study segments |  | | Report (volume) | | California-Bldg. 3, Rm. 3128, 345 Middlefield Rd. • RESTON, Virginia-USGS National Center, Rm. 1C402, 12201 Sunrise...in stratigraphic nomenclature in Maryland and Virginia UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON:...Highly generalized map of part of the Maryland-Virginia Piedmont showing distribution of ultramafic rocks...plots of some ultramafic rocks from the Maryland-Virginia Piedmont .......................................and CIPW norms of some ultramafic rocks from the Virginia and Maryland Piedmont ............. AIO Aii |  | | Report (volume) | | C~eology of the Marshall Quadrangle, Flauquier County, Virginia By Gilbert H. Espenshade U.S. GEOLOGICAL...1912Geology of the Marshall Quadrangle, Fauquier County, Virginia. (U.S. Geological Survey bulletin ; 1560)...of Docs. no.: I 19.3:1560) 1. Geology-Virginia-Fauquier County. I. Title. II. Series. QE75.B9 no. 1560...Geologic map of the Marshall quadrangle, Fauquier County, Virginia • • • • • • • • • • • • • • • • • • • In pocket...side of the Blue Ridge anticlinorium in northern Virginia •••••••• 17 Volcanic breccia in low-titanium metabasalt |  | | Report (issue) | | Great Falls of the Potomac River, looking north on the Virginia side. The Potomac falls 80 feet across...Neoproterozoic to Early Cambrian age. Downcutting of the Potomac from the bedrock terrace to the current river channel...field trips 5 and 6. Photograph by Gary Fleming, Virginia Department of Conservation and Recreation. Geology...Sections Geological Society of America Tysons Corner, Virginia March 24-27, 2004 Edited by Scott Southworth and...Groat, Director U.S. Geological Survey, Reston, Virginia: 2004 Free on application to U.S. Geological |  | | Journal (issue) | | that when new at this business of collecti ng, the mine dumps in Penn• sylvania's anthracite region "·ere...pleasure of bunting around in the glacial debris and mine dumps of this arctic wonderland, where the sun never...northwest fo r our first destination the Herk imer County quar tz locality at )liddleYille about 125 mile:...and which is in the eastern part of J efferson County. On arrival in the ,·Ulage, we found to our regret...of the same county. J efferson, is Antwerp. made famous by the Sterling iron mine. The mine has long since |  | | Report (volume) | | .........Prof. George H. Perkins, Burlington. Virginia...........Dr. Thomas L. Watson, Charlottesville...Washington....... Prof. Henry Landes, Seattle. West Virginia... .Dr. I. C. White, Morgantown. Wisconsin......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 |  | | Report (chapter) | | Canada Rhode Island South Carolina Tennessee Virginia Vermont Northern Appalachians AD ADM AG AT BM...complex Chain Lakes massif Canaan Mountain Dutchess County Elmore Mountain Exeter pluton Green Mountain massif...synclinorium OB PR RF SR WC WCP Occoquan batholith Potomac River Rosemont fault zone Susquehanna River Wilmington...Wenlock metamorphism in the northern Appalachians, USA. Abbreviations are defined in Table 1. The stippled...muscovite Mafic schist 4°Ar/39Ar total fusion, actinolite Felsic schist K - A r muscovite Felsic schist |  | | Report (volume) | | changes in stratigraphic nomenclature in Vermont, Virginia, Maryland, and the District of Columbia UNITED...Robertson River Igneous Suite, Blue Ridge Province, Virginia ................................................and Clarendon Granite in the Potomac Valley, Washington, D.C., Virginia, and Maryland .................Suite and adjacent rocks in northern and central Virginia. Generalized geologic map of parts of the Washington...actually highly retrograded salt-and-pepper-textured actinolite gneiss and GREEN MOUNTAIN MASSIF, VERMONT |  | | Report (issue) | | ...........................................80 Virginia ................................................blackwall or a soapstone containing talc, chlorite, actinolite, serpentine, carbonate, and Fe-oxide minerals...Texas, Arkansas, Alabama, Georgia, North Carolina, Virginia, Maryland, Pennsylvania, Massachusetts, Vermont...marble with talc and tremolite. Talc deposits in Virginia are all derived from ultramafic rocks and are...for which production is reported are indicated by mine symbols on these figures, however, the quantity |  | | Report (issue) | | COMMONWEALTH OF VIRGINIA DEPARTMENT OF CONSERVATION AND ECONOMIC DEVELOPMENT DIVISION OF MINEML RESOURCES...MINERAL RESOURCES OF PAGE COUNTY RHESA M. ALLEN, JR. BULLETIN 8I VIRGINIA DIVISION OF MINERAL RESOURCES...CHARLOTTESVI LLE, VIRGI N IA 1967 COMMONWEALTH OF VIRGINIA DEPARTMENT OF CONSERVATION AND ECONOMIC DEVELOPMENT...MINERAL RESOURCES OF PAGE COUNTY RHESA M. ALLEN, JR. BULLETIN 8I VIRGINIA DIVISION OF MINERAL Commissioner...CONSERVATION AND ECONOMIC DEVELOPMENT Richmond, Virginia ManvrN M. Sursenr-two, Di.rector Culnr,rs A. CnnrsroplrERsEN |  | | Journal (article/letter/editorial) | | Gem, Lapidary and Mineral Society of Montgomery County, Maryland, Wheaton, was one by John Greisback on...for Quartz and Ben Schmidt for faceted stones. VIRGINIA Being one who wonders why formal meetings are...members of the Gem and Mineral Society of the Virginia Peninsula, Inc., Hampton, were having a picnic...Trips of the year when its members went to the Mica Mine Farm. The material found was clear quartz, clear...quartz crystals, unakite and possibly gold in Moore County was enjoyed by members of the Charlotte Rock and |  | | Report (issue) | | Upperville 7.5-Minute Quadrangle, Fauquier and Loudoun Counties, Virginia By Arthur E. Nelson1 Open-File Report...extends northeasterly from North Carolina through Virginia, Maryland, and into southern Pennsylvania (Espenshade...the overlying Catoctin in Maryland, close to the Potomac River. A greenish gray to light olive gray phyllite...basement are known; the Mount Rogers area of southern Virginia, the South Mountain area of southern Pennsylvania...studied rod and bleb microperthites in the northern Virginia Blue Ridge and suggested they formed in a granulite |  | | Report (issue) | | Crystalline Rocks of the Potomac River Gorge Near Washington, D.C. GEOLOGICAL SURVEY PROFESSIONAL PAPER...PAPER 414-H Crystalline Rocks of the Potomac River Gorge Near Washington, D.C. By JOHN C. REED, JR.,...description of the rocks exposed in the gorge of the Potomac River below Great Falls, with a discussion of their...studied. Geologic map and sections of part of the Potomac River Gorge near Washington, D.C. Textures and... CONTRIBUTIONS TO GENERAL GEOLOGY CRYSTALLINE ROCKS OF THE POTOMAC RIVER GORGE NEAR WASHINGTON, D.C. By JOHN C. REED |  | | Report (issue) | | concentration, and radon in soil gas, Fairfax County, Virginia by R. Randall Schumann1 and Douglass E. Owen*...concentrations of rocks and soils in Fairfax County, Virginia. Radon concentration, eU, eTh, and percent...determined for 129 sites along 15 traverses in the county. These data were grouped according to underlying...concentrations of gases in rocks and soils in Fairfax County, Virginia. The intent of this paper is to discuss some...concerning radon in rocks and soils underlying the county, and how these radon concentrations are related |  | | 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) | | Complexes of the NorthCentral Culpeper Basin, Virginia By Charles E. Brown U.S. GEOLOGICAL SURVEY Open-File.......... 2 Geologic Setting of Culpeper Basin, Virginia..................... 5 Acknowledgments..........COMPLEXES OF TPTE NORTH-CENTRAL CULPEPER BASIN, VIRGINIA Charles E. Brown ABSTRACT Direct current-electrical...nine sites in the early Mesozoic Culpeper basin, Virginia to ascertain basinal-rock characteristics. The...east front of the Blue Ridge geologic province in Virginia and Maryland (fig. 1). It is part of a belt of |
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