| 
Country:
 | 
Poland 
 | 
| 
Province:
 | 
Lublin Coal Basin 
 | 
| 
Locality:
 | 
Swidnik 2 borehole 
 | 
| 
Layer:
 | 
G1, 1244-1250 m | 
| 
Lower Boundary:
 | 
Marsdenian--Yeadonian         [MRD--YEA], 313.8 million years
 
 | 
| 
Upper Boundary:
 | 
Yeadonian--Langsettian, Westph.A [YEA--, 313 million years
 
 | 
| 
Georeference:
 | 
 |