GEOLOGY OF THE LINGANORE NAPPE IN THE WESTMINSTER GEOLOGY OF THE LINGANORE NAPPE IN THE WESTMINSTER

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Text of GEOLOGY OF THE LINGANORE NAPPE IN THE WESTMINSTER GEOLOGY OF THE LINGANORE NAPPE IN THE WESTMINSTER

  • State of Maryland DEPARTMENT OF NATURAL RESOURCES

    MARYLAND GEOLOGICAL SURVEY Jeffrey P. Halka, Director

    REPORT OF INVESTIGATIONS NO. 80

    GEOLOGY OF THE LINGANORE NAPPE IN THE WESTMINSTER TERRANE,

    WESTERN PIEDMONT OF MARYLAND

    by

    Jonathan Edwards, Jr.

    2012

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    Martin O’Malley

    Governor

    Anthony C. Brown Lieutenant Governor

    John R. Griffin Secretary

    Joseph P. Gill Deputy Secretary

    MARYLAND DEPARTMENT OF NATURAL RESOURCES 580 Taylor Avenue

    Annapolis, Maryland 21401 General DNR Public Information Number: 1-800-260-8DNR

    http://www.dnr.maryland.gov Publication Number DNR 12-582012-570

    MARYLAND GEOLOGICAL SURVEY

    2300 St. Paul Street Baltimore, Maryland 21218

    General MGS Telephone Number: 410-554-5500 http://www.mgs.md.gov

    The facilities and services of the Maryland Department of Natural Resources are available to all without regard to race, color, religion, sex, age,

    national origin, or physical or mental disability.

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    TABLE OF CONTENTS page EXECUTIVE SUMMARY .......................................................................................................................... 1 ABSTRACT.................................................................................................................................................. 2 INTRODUCTION ........................................................................................................................................ 3 GEOLOGIC SETTING ...................................................................................................................... 3 HISTORY OF INVESTIGATIONS................................................................................................... 4 STRATIGRAPHY ........................................................................................................................................ 4 SAMS CREEK FORMATION .......................................................................................................... 5 Name and previous work ......................................................................................................... 5 Lithologic description .............................................................................................................. 5 Distribution .............................................................................................................................. 6 Environment of deposition....................................................................................................... 6 WAKEFIELD MARBLE ................................................................................................................... 6 Name and previous work ......................................................................................................... 6 Lithologic description .............................................................................................................. 6 Distribution .............................................................................................................................. 6 Environment of deposition....................................................................................................... 8 SUGARLOAF MOUNTAIN QUARTZITE ...................................................................................... 8 Name and previous work ......................................................................................................... 8 Lithologic description .............................................................................................................. 8 Distribution .............................................................................................................................. 8 Environment of deposition....................................................................................................... 8 URBANA FORMATION................................................................................................................... 8 Name and previous work ......................................................................................................... 8 Lithologic description .............................................................................................................. 9 Distribution .............................................................................................................................. 9 Environment of deposition....................................................................................................... 9 ARABY FORMATION ..................................................................................................................... 9 Name and previous work ......................................................................................................... 9 Lithologic description .............................................................................................................. 9 Distribution ............................................................................................................................ 10 Environment of deposition..................................................................................................... 10 IJAMSVILLE FORMATION .......................................................................................................... 10 Name and previous work ....................................................................................................... 10 Lithologic description ............................................................................................................ 10 Distribution ............................................................................................................................ 10 Environment of deposition..................................................................................................... 11 MARBURG FORMATION ............................................................................................................. 11 Name and previous work ....................................................................................................... 11 Lithologic description ............................................................................................................ 11 Distribution ............................................................................................................................ 12 Environment of deposition..................................................................................................... 12 SILVER RUN LIMESTONE ........................................................................................................... 12 Name and previous work ....................................................................................................... 12 Lithologic description ............................................................................................................ 12 Distribution ............................................................................................................................ 13 Environment of deposition..................................................................................................... 13

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    GILLIS FORMATION..................................................................................................................... 13 Name and previous work ....................................................................................................... 13 Lithologic description ............................................................................................................ 13 Distribution ............................................................................................................................ 15 PRETTYBOY SCHIST.................................................................................................................... 15 Name and Previous work ....................................................................................................... 15 Lithologic description ............................................................................................................ 16 Distribution ............................................................................................................................ 16 Environment of deposition..................................................................................................... 16 CORRELATION AND AGE...................................................................................................................... 16 INTRODUCTION............................................................................................................................ 16 SAMS CREEK FORMATION ........................................................................................................ 16 WAKEFIELD MARBLE ................................................................................................................. 18 SUGARLOAF MOUNTAIN QUARTZITE .................................................................................... 18 URBANA FORMATION................................................................................................................. 18 ARABY FORMATION ................................................................................................................... 18 IJAMSVILLE FORMATION .......................................................................................................... 18 MARBURG FORMATION ..