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LocNo: 3541middle Atoka Fm.
Country: USA
Province: Arkansas, Conway Co.
Locality: Morrilton, W of Arkansas River
Layer: middle Atoka Fm.
Lower Boundary: UAR Lower--Upper Atoka Fm., 309.2 million years
Upper Boundary: UAR Upper Atoka Fm. top, 308.6 million years
Georeference: