Bedrock
Conococheague Limestone
Sedimentary
Bedding
Lower Ordovician and Upper Cambrian
Calcium carbonate
Trilobites
Gray
Limestone, dolostone, and sandstone
OCc
Conococheague Limestone (Lower Ordovician and Upper Cambrian)
Big Spring Station
Upper Cambrian
Trilobite
Light-gray
Dolomite and dolomitic sandstone
Ccbs
Big Spring Station Member (Upper Cambrian)
Elbrook Limestone
Upper and Middle Cambrian
Limestone with dolostone
Ce
Elbrook Limestone (Upper and Middle Cambrian)
Waynesboro
Chewsville
Lower Cambrian
Red
Siltstone and shale
Cwac
Waynesboro Formation (Lower Cambrian) Chewsville Member
Cavetown
Tan
Limestone with dolomite
Cwak
Waynesboro Formation (Lower Cambrian) Cavetown Member
Red Run
Tan, green
Sandstone and shale
Cwar
Waynesboro Formation (Lower Cambrian) Red Run Member
Tomstown
Dargan
Metasedimentary
Cleavage, bedding
Chlorite
Ctd
Tomstown Formation (Lower Cambrian) Dargan Member