| State | Virginia |
|---|---|
| Name | Lower Devonian and Silurian Formations Undivided |
| Geologic age | Silurian-Devonian |
| Lithologic constituents | Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Carbonate > Limestone
|
| Comments | Undivided; Appalachian Plateaus and Valley and Ridge |
| 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 | Alleghany - Augusta - Bland - Botetourt - Craig - Frederick - Giles - Lee - Montgomery - Pulaski - Roanoke - Rockbridge - Rockingham - Scott - Shenandoah - Smyth - Tazewell - Wythe - Radford |