| 
Country:
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USA 
 | 
| 
Province:
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Texas, Parker Co. 
 | 
| 
Locality:
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Garner, TXD-02 
 | 
| 
Layer:
 | 
Grindstone Creek Fm., undifferentiated | 
| 
Lower Boundary:
 | 
U   Atokan--Desmoinesian      [ATO--DES], 308.6 million years
 
 | 
| 
Upper Boundary:
 | 
U   Desmoinesian--Missourian  [DES--MIS], 306.5 million years
 
 | 
| 
Georeference:
 | 
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