Middle and Upper Mogan Formation comenditic ignimbrite X (13.71 Ma) and A (13.63 Ma).
In pumices.
Inclusions in amphiboles (associated with Ti/Fe-oxides clusters).
Quality of samples:
not specified / average specimens
Confirmation
Validity:
Believed Valid
References
References:
V.R. Troll et al. , Contrib. Mineral. Petrol. , 2003, 145, PP. 730-741.