Some rocks resulting from various field trips... Select a group and a sample to continue!
Sample...
"Ignimbrites and "fiamme""
From: Monte Torru (right one) and Alghero (the two on the left, Sardinia, Italy) Mineral(s): Quartz, plagioclase, alkaline feldspar, glass (black, "fiamme") Age: Miocene (18-16 Ma)