Newark Supergroup; Triassic Sandstone, Siltstone, and Shale (VATRss;0)

State	Virginia
Name	Newark Supergroup; Triassic Sandstone, Siltstone, and Shale
Geologic age	Upper Triassic
Original map label	TRss
Comments	Newark Supergroup; Mesozoic Basins. Paper map and digital map have differernt labels: paper map does not have TR prefix, but the digital source has TR as part of the label. From expanded explanation (ref. VA002): Sandstone, siltstone, and shale, interbedded. Sandstone, very fine- to coarse-grained, reddish-brown to gray, micaceous, minor conglomerate beds. Siltstone, reddish-brown to gray, micaceous. Shale, reddish-brown, greenish-gray, gray, yellowish-brown, laminated, fossiliferous. Upward-fining sequences, discontinuous vertically and horizontally.
Primary rock type	sandstone
Secondary rock type	siltstone
Other rock types	shale
Lithologic constituents	Major Sedimentary > Clastic > Siltstone Sedimentary > Clastic > Sandstone Sedimentary > Clastic > Mudstone > Shale
Map references	Digital Representation of the 1993 Geologic Map of Virginia", 2003, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, viewing software not included. This is a digital version of "Geologic Map of Virginia" published in 1993. Available from: https://www.dmme.virginia.gov/commerce/ [https://www.dmme.virginia.gov/commerce/]
Unit references	Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000 Digital Representation of the 1993 Geologic Map of Virginia - expanded explanation: 2003, Commonwealth of Virginia, Department of Mines, Minerals, and Energy, Divsion of Mineral Resources, Publication 147, 85 pp Digital Representation of the 1993 Geologic Map of Virginia", 2003, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, viewing software not included. This is a digital version of "Geologic Map of Virginia" published in 1993. Available from: https://www.dmme.virginia.gov/commerce/ [https://www.dmme.virginia.gov/commerce/]
Geographic coverage	Albemarle - Amelia - Buckingham - Campbell - Caroline - Charlotte - Chesterfield - Culpeper - Cumberland - Dinwiddie - Fairfax - Fauquier - Goochland - Halifax - Hanover - Henrico - Henry - Loudoun - Nelson - Orange - Pittsylvania - Powhatan - Prince Edward - Prince William - Manassas - Manassas Park