| 
Country:
 | 
Poland 
 | 
| 
Province:
 | 
Upper Silesian Coal Basin 
 | 
| 
Locality:
 | 
Marcinki IG1 borehole 
 | 
| 
Layer:
 | 
Go alpha, 3604,6-4079 m | 
| 
Lower Boundary:
 | 
Up.Visean  Goniatites BZ base [up.VIS], 333.5 million years
 
 | 
| 
Upper Boundary:
 | 
DER Go beta striatus--Go beta falcatus, 329.4 million years
 
 | 
| 
Georeference:
 | 
 |