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LocNo: 3531upper Johns Valley Shale
Country: USA
Province: Arkansas, Scott Co.
Locality: Boles, near
Layer: upper Johns Valley Shale
Lower Boundary: U Halian--Bloydian, Brentwood base, 313 million years
Upper Boundary: U Morrowan (Bloydian)--Atokan[MOR--ATO], 310.4 million years
Georeference: