Skip to main content

Poe Bridge Mountain Group

Poe Bridge Mountain Group - coarse to fine-grained feldspathic graphite schist, +/- staurolite +/- kyanite +/- sillimanite-muscovite-biotite schist, and garnet-biotite-muscovite schist, and gneiss; locally common pegmatites. Rocks in the area of Turkey Heaven Mountain in Cleburne and Randolph Counties that are here assigned to the Poe Bridge Mountain Group also have been interpreted as part of the Wedowee Group.
State Alabama
Name Poe Bridge Mountain Group
Geologic age Precambrian to Paleozoic
Comments Printed map includes map units 'pbm, pbmgr, and pbmgt' in one description; split them up here.
Primary rock type mica schist
Secondary rock type gneiss
Other rock types pegmatite
Lithologic constituents
Major
Metamorphic > Schistcoarse to fine-grained feldspathic graphite schist, +/- staurolite +/- kyanite +/- sillimanite-muscovite-biotite schist, and garnet-biotite-muscovite schist.
Minor
Metamorphic > Gneiss
Incidental
Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite
Map references
Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.
Unit references
Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.
Counties Clay - Cleburne