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Newark Supergroup; Sandstone, undifferentiated

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Fine- to coarse-grained, reddish-brown to gray, primary bedding features such as cross-beds, channel lags, and ripple marks , minor conglomerate, siltstone, and shale beds.
State Virginia
Name Newark Supergroup; Sandstone, undifferentiated
Geologic age Upper Triassic
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
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.
References

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.
NGMDB product
Counties Albemarle - Culpeper - Fairfax - Fauquier - Halifax - Loudoun - Orange - Pittsylvania - Prince William - Danville - Manassas - Manassas Park