Los Frailes Volcanic Complex, Bolivia


Petrology and geochemistry of the Frailes ignimbrite

Publications: Keller, 2010

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

Thin-section photomicrograph (top: plane polarized light; bottom: crossed polars) of magmatic cordierite in a peraluminous, corundum-normative sample from the Condor Nasa ignimbrite.