Newark Supergroup; Conglomerate, greenstone clasts

Rounded to subrounded pebbles, cobbles, and boulders of predominantly metavolcanic Catoctin greenstone in a matrix of fine- to coarse-grained, silicified, ferruginous-cemented, greenish-gray to dark-green, clayey sandstone.
State Virginia
Name Newark Supergroup; Conglomerate, greenstone clasts
Geologic age Upper Triassic
Lithologic constituents
Major
Sedimentary > Clastic > Conglomerateconglomerate with greenstone clasts
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 Culpeper - Loudoun - Madison - Orange