| 
Country:
 | 
Great Britain 
 | 
| 
Province:
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England,Yorkshire 
 | 
| 
Locality:
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Halifax 
 | 
| 
Layer:
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Tournaisian | 
| 
Lower Boundary:
 | 
low.Tournais.--mid.Tournais.  [Tn1--Tn2], 357.5 million years
 
 | 
| 
Upper Boundary:
 | 
Up.Visean  Goniatites BZ base [up.VIS], 333.5 million years
 
 | 
| 
Georeference:
 | 
 |