CZi
Bedrock
Ijamsville Phyllite
Sedimentary
Bedding
Lower Cambrian? and Ediacaran?
Phyllite, slate, and phyllonite containing quartz
Blue, purple, and green
Phyllite, slate, and phyllonite containing pods and folded stringers of white ve
Ijamsville Phyllite (Lower Cambrian? and Neoproterozoic?)
Car
Araby
Metasedimentary
Middle and Lower Cambrian
Metasiltstone
Light-brownish gray
Araby Formation (Middle and Lower Cambrian)
Cfrs
Frederick
Rocky Springs Station
Upper Cambrian
Dolomitic limestone, polymictic breccia, sandstone, and shale
Dark-gray
Frederick Formation (Upper Cambrian) Rocky Springs Station Member (2)
Cfr
Frederick Formation (Upper Cambrian) Rocky Springs Station Member (1)
Cfa
Adamstown
Limestone and dolomite
Frederick Formation (Upper Cambrian) Adamstown Member
Cfl
Lime Kiln
Limestone and calcareous shale
Frederick Formation (Upper Cambrian) Lime Kiln Member