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Country:
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USA 
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Province:
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Texas, Kimble Co. 
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Locality:
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London, 6.5 mls ESE, Big Sal.Cr., Llano 
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| 
Layer:
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Marble Falls Fm. | 
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Lower Boundary:
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UAR Lower--Upper Atoka Fm., 309.2 million years
 
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| 
Upper Boundary:
 | 
U   Atokan--Desmoinesian      [ATO--DES], 308.6 million years
 
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Georeference:
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