State | Alabama |
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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 | |
Counties | Chambers - Elmore - Randolph - Tallapoosa |