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Country:
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Czech Republic 
 | 
| 
Province:
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Bohemia 
 | 
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Locality:
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Praha-Holyne, V rokli quarry 
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| 
Layer:
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upper Trebotov Lst. | 
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Lower Boundary:
 | 
CZB Daleje Shale--Trebotov Lst., 402 million years
 
 | 
| 
Upper Boundary:
 | 
CZB Trebotov Lst.--Chotec Lst., 397.5 million years
 
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| 
Georeference:
 | 
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