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Opelika Complex; Loachapoka Schist

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Muscovite-quartz schist; locally contains biotite-garnet-muscovite schist, many layers conatin sillimanite (northeast of Mount Jefferson, Lee County); kyanite (west of Mount Jefferson); locally muscovite-rich schist and quartzite common.
State Alabama
Name Opelika Complex; Loachapoka Schist
Geologic age Precambrian to Paleozoic
Lithologic constituents
Major
Metamorphic > Schist > Mica-schist > Muscovite-schistmuscovite-quartz schist; locally contains biotite-garnet-muscovite schist, many layers contain sillimanite (northeast of Mount Jefferson, Lee County); kyanite (west of Mount Jefferson); locally muscovite-rich schist and quartzite common.
Minor
Metamorphic > Metasedimentary > Metaclastic > Quartzitelocally muscovite-rich schist and quartzite common.
References

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.
NGMDB product
Counties Chambers - Lee - Macon - Tallapoosa