Petrography and geochemistry of achnelithic tephra from Las Herrerías Volcano (Calatrava volcanic field, Spain): Formation of nephelinitic achneliths and post-depositional glass alteration

1. Carracedo-Sánchez, M.
2. Sarrionandia, F.
3. Arostegui, J.
4. Errandonea-Martin, J.
5. Gil-Ibarguchi, J.I.