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Country:
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USA 
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| 
Province:
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Arkansas, Crawford Co. 
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Locality:
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Mountainburg qu., T.10N., R.29W. 
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| 
Layer:
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Atokan, 1000 m above base | 
| 
Lower Boundary:
 | 
Langsettian--Duckmantian, Westphal.A--B, 311.3 million years
 
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| 
Upper Boundary:
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U   Atokan--Desmoinesian      [ATO--DES], 308.6 million years
 
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| 
Georeference:
 | 
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