|Name||Mad Indian Group|
|Geologic age||Precambrian to Paleozoic|
Metamorphic > Schist > Mica-schistmedium to coarse-grained muscovite-biotite-garnet schist; locally kyanite and sillimanite. Many of the schists have been retrograded to chlorite-garnet-quartz-sericite schist. Commonly includes irregular zones of sericite-quartz schist (+/- garnet) containing finely disseminated graphite, possibly infolded Wedowee Group equivalents.
Metamorphic > Gneiss > Biotite-gneissfine-grained feldspathic biotite gneiss
Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite (Dike or sill)Extensively cut by feldspathic dikes and pegmatites.
|Comments||Printed map includes map units 'mi and migr' in one description; split them up here.|
Szabo, M.W., Osborne, E.W., Copeland, C.W. Jr., and Neathery, T.L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.
|Counties||Clay - Cleburne - Randolph|