Upper and Middle Ordovician Formations Undivided (VAOz;0)

State	Virginia
Name	Upper and Middle Ordovician Formations Undivided
Geologic age	Ordovician
Original map label	Oz
Comments	Undivided; Appalachian Plateaus and Valley and Ridge
Primary rock type	shale
Secondary rock type	sandstone
Other rock types	mudstone; limestone; siltstone; graywacke; chert
Lithologic constituents
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", 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	Clarke - Lee - Russell - Scott - Shenandoah