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 ..