Quaternary Herchenberg composite tephra cone (East Eifel, FR Germany).
PhotoID745
Quaternary Herchenberg composite tephra cone (East Eifel, FR Germany).
PhotoID745
Photograph: Alessandro Da Mommio
Reference: Evolution of the Quaternary melitite-nephelinite Herchenberg volcano (East Eifel) Ulrich Bednarz and Hans-Ulrich Schmincke