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Dadeville Complex; Rock Mills Granite Gneiss

Rock Mills Granite Gneiss - coarse to medium-grained biotite granite gneiss; locally includes thick bands of epidote and thin, small amphibolite bodies. Boundary between Rock Mills Granite Gneiss and Camp Hill Granite Gneiss arbitrarily defined.
StateAlabama
NameDadeville Complex; Rock Mills Granite Gneiss
Geologic agePrecambrian to Paleozoic
Original map labeldrm
Primary rock typegranitic gneiss
Secondary rock typeamphibolite
Other rock types
Lithologic constituents
Major
Metamorphic > Gneisscoarse to medium-grained biotite granite gneiss
Minor
Metamorphic > Amphibolite (Amphibolite, epidote-amphibolite)includes thick bands of epidote and thin, small amphibolite bodies.
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.
Geographic coverageChambers - Randolph - Tallapoosa

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ALdrm;8
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