Skip to main content

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.
State Alabama
Name Attalla Chert Conglomerate Member of the Chickamauga Limestone
Geologic age Ordovician
Primary rock type conglomerate
Secondary rock type chert
Other rock types shale; dolostone (dolomite); quartzite
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
Sedimentary > Carbonate > Dolostoneconglomerate of pebbles, cobbles, and boulders of chert and rare dolomite and quartzite in a sand-sized chert and quartz matrix
Metamorphic > Metasedimentary > Metaclastic > Quartziteconglomerate 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.
Counties Blount - Cherokee - Etowah - Jefferson - Saint Clair