
This book is a detailed study of the phonolites found in the Velay and Westerwald regions of France and Germany. It includes an analysis of the mineralogy and petrology of these rocks, as well as a discussion of their geological significance. This is an essential resource...

This book is a detailed study of the phonolites found in the Velay and Westerwald regions of France and Germany. It includes an analysis of the mineralogy and petrology of these rocks, as well as a discussion of their geological significance. This is an essential resource...