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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