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Attalla Chert Conglomerate Member of the Chickamauga Limestone

Attalla Chert Conglomerate Member of the Chickamauga Limestone - conglomerate of pebbles, cobbles, and boulders of chert and rare dolomite and quartzite in a sand-sized chert and quartz matrix; thin beds of gray-green or dusky-red shale common at base.
StateAlabama
NameAttalla Chert Conglomerate Member of the Chickamauga Limestone
Geologic ageOrdovician
Original map labelOca
Primary rock typeconglomerate
Secondary rock typechert
Other rock typesdolostone (dolomite); quartzite; shale
Lithologic constituents
Major
Sedimentary > Clastic > Conglomerateconglomerate of pebbles, cobbles, and boulders of chert and rare dolomite and quartzite in a sand-sized chert and quartz matrix
Minor
Sedimentary > Chemical > Chertconglomerate of pebbles, cobbles, and boulders of chert and rare dolomite and quartzite in a sand-sized chert and quartz matrix
Sedimentary > Clastic > Mudstone > Shalethin beds of gray-green or dusky-red shale common at base
Incidental
Metamorphic > Metasedimentary > Metaclastic > Quartziteconglomerate of pebbles, cobbles, and boulders of chert and rare dolomite and quartzite in a sand-sized chert and quartz matrix
Sedimentary > Carbonate > Dolostoneconglomerate of pebbles, cobbles, and boulders of chert and rare dolomite and quartzite in a sand-sized chert and quartz matrix
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.

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