|   | 
Locality | 
Layer | 
 
 | 
Belgium, Liège, Berwinne Valley | 
Section 748 Berwinne Valley | 
 
 | 
Belgium, Liège, Geule Valley | 
Section 1 Geule Valley | 
 
 | 
Germany, Rhenish Mountains, Ruhr region + adjacent area, combined | 
Up.Carboniferous | 
 
 | 
Great Britain, England,Derbyshire, Alport Dale Borehole | 
Section Namur., Alport Dale | 
 
 | 
Great Britain, England,Derbyshire, Alport Valley, Swint Clough | 
R1 | 
 
 | 
Great Britain, England,Derbyshire, Alport Valley, Swint Clough | 
R1; Section up.pt.Reticuloc.Z. |