Los Frailes Volcanic Complex, Bolivia

Petrology and geochemistry of the Frailes ignimbrite

The massive columnar-jointed flow of the main Frailes ignimbrite is dissected by the Pillkumayu river near Potosi, Bolivia


Main flow of the Frailes ignimbrite


Silicified elutriation columns resist erosion relative to the surrounding tuff of the main Frailes ignimbrite


Magmatic cordierite in a corundum-normative sample from the Condor Nasa ignimbrite flow.