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Higgins Ferry Group

Higgins Ferry Group - thinly layered coarse to fine-grained biotite-feldspar-quartz gneiss, sericite-feldspar-muscovite schist, +/- biotite +/- garnet-muscovite schist, and biotite-garnet feldspathic gneiss; locally common pegmatites.
State Alabama
Name Higgins Ferry Group
Geologic age Precambrian to Paleozoic
Comments Printed map includes units 'hf, hfgr and hfgt' all under one description; split them up here.
Primary rock type felsic gneiss
Secondary rock type mica schist
Other rock types pegmatite
Lithologic constituents
Major
Metamorphic > Gneissthinly layered coarse to fine-grained biotite-feldspar-quartz gneiss, biotite-garnet feldspathic gneiss
Metamorphic > Schist > Mica-schist > Muscovite-schistsericite-feldspar-muscovite schist, +/- biotite +/- garnet-muscovite schist; locally includes masses of roscoelite-graphite-quartz schist.
Minor
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 Chilton - Clay - Coosa