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Stop 3 22°39'4.39"S/ 67°24'38.07"W/4769m
Guacha Ignimbrite.- The closer outcrop toward the resurgent dome is the Guacha vitrophyde. It outcrops in the ENE side of the caldera, conforming a very conspicuous unit, since is darker than the distal ignimbrites. (pict 13 and 14).
Pict 5.- Dome overlaying the Guacha vitrophyde
Pict 13.- Outcrop of vitrophyde white ignimbrites maybe correspond to Tara ignimbrite ?