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 ?