Jacksons Gap Group; Jacksons Gap Group undifferentiated in part (ALjg;7)

Jacksons Gap Group; Jacksons Gap Group undifferentiated in part

Principally graphitic sericite (muscovite)-quartz schist; includes sericite-quartz phyllonite; sericite phyllonite, blastomylonite, porphyroclastic blastomylonite schist, and mylonite quartzite occur principally along margins in south and form most of unit northeast of Jacksons Gap, Tallapoosa County.

State	Alabama
Name	Jacksons Gap Group; Jacksons Gap Group undifferentiated in part
Geologic age	Precambrian to Paleozoic
Lithologic constituents	Major Metamorphic > Schist > Mica-schist > Muscovite-schistprincipally graphitic sericite (muscovite)-quartz schist; includes porphyroclastic blastomylonite schist Minor Metamorphic > Metasedimentary > Metaclastic > Quartzitemylonite quartzite Tectonite > Mylonite > Phylloniteincludes sericite-quartz phyllonite; sericite phyllonite, blastomylonite.
Comments	part of Brevard Fault Zone. Printed map has units 'jg' and 'jgc' in one description; split them up here.
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	NGMDB product page for 55859
Counties	Chambers - Elmore - Randolph - Tallapoosa

Jacksons Gap Group; Jacksons Gap Group undifferentiated in part

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.