| 
Country:
 | 
Poland 
 | 
| 
Province:
 | 
Lublin Coal Basin 
 | 
| 
Locality:
 | 
Wiercenie Kock 7 borehole 
 | 
| 
Layer:
 | 
E, 1007-965 m | 
| 
Lower Boundary:
 | 
Visean--Namurian/Serpukhovian [VIS--NAM], 326.4 million years
 
 | 
| 
Upper Boundary:
 | 
Arnsbergian--Chokierian [ARN--CHO], 319 million years
 
 | 
| 
Georeference:
 | 
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