Gettysburg Shale (MDTRg;2)

State	Maryland
Name	Gettysburg Shale
Geologic age	Triassic
Original map label	Trg
Comments	A new palynomorph species, FROELICHSPORITES TRAVERSEI, occurs throughout Newark Supergroup of eastern United States and Canada, Dockum Group of TX and NM, and Chinle Formation of NM, AZ, and UT. It is restricted geologically to strata deposited during upper Carnian and Norian Stages of the Upper Triassic. It occurs in the following formations of the Newark Supergroup: Passaic Formation (NJ), Gettysburg Formation (PA and MD), Manassas Sandstone (MD), Balls Bluff Siltstone (VA), Cow Branch Formation (NC), and Stoneville Formation (NC) [as reported by ref. MD005].
Primary rock type	shale
Secondary rock type	sandstone
Other rock types	siltstone
Lithologic constituents	Major Sedimentary > Clastic > Sandstone Sedimentary > Clastic > Mudstone > Shale Minor Sedimentary > Clastic > Siltstone
Map references	Cleaves, E.T., Edwards, J., Jr., Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological Survey, Baltimore, Maryland, scale 1:250,000.
Unit references	Cleaves, E.T., Edwards, J., Jr., Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological Survey, Baltimore, Maryland, scale 1:250,000. Unpublished digital version of the Maryland state geologic map that was digitized by the USGS Water Resources Office in Towson, MD USGS Geologic Names Lexicon (GEOLEX) [http://ngmdb.usgs.gov/Geolex/]
Geographic coverage	Carroll - Frederick