|Name||Newark Supergroup; Triassic shale and siltstone|
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Siltstone
|Comments||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.|
Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000.
Virginia Division of Mineral Resources, 2003, Digital Representation of the 1993 Geologic Map of Virginia, Publication 174, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, scale 1:500,000.
|Counties||Campbell - Culpeper - Fairfax - Fauquier - Halifax - Loudoun - Madison - Orange - Pittsylvania - Prince William - Manassas|