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AGS / Education / Geology Resources / Physiographic Regions / Ouachita Mountains / Geology


The Ouachita Mountain Region contains thick sequences of sedimentary rocks deposited in a deep ocean basin that have been uplifted and compressed northward into east-west trending complex folds (anticlines and synclines) and thrust faults due to major orogenic (mountain building) processes.  The most intensely deformed area is in the central portion of the fold belt.
Vertical bedding at Y-City

Vertical bedding at Y-City

Syniclinal fold in rocks near Hot Springs Arkansas

Synlinal fold in rocks near Hot Springs Arkansas

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Arkansas Geological Survey
Vardelle Parham Geology Center
3815 West Roosevelt Road
Little Rock, AR 72204
Phone: 501-296-1877 | Fax: 501-663-7360
Business Hours: Monday - Friday 8:00am - 4:30pm

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