PLATE XXX 



WEST CORDILLERA NEAR CERRO DE PASCO 



Fig. 1. — Limestone summits in the West Cordillera as seen in the Oyon- 

 Cerro de Pasco Section. 



WEST CORDILLERA NEAR UTOTO 



Fig. 2. — The West Cordillera in the region of Utoto, showing limestones 

 on the left and volcanics on the right. Ore bodies exist near the contact. 



