Morococala
Coordinates: 18°10′S 66°45′W / 18.167°S 66.750°W Morococala is a volcanic field in Bolivia, in the Department Oruro. It is formed by ignimbrites and associated volcanic features.
It is part of the chain of plutons that extends over the Cordillera Real and the Cordillera Occidental and are the sites of mining activity.
It lies in the Cordillera Occidental. The city of Oruro lies northwest of Morococala, and the town of Llallagua is just south.
Morococala consists of a high plateau, and is a field consisting of ignimbrites and tuffs, which were deposited on top of the basement. These form sequences with thicknesses on average less than 100 metres (330 ft). This field covers a surface area of 1,500 square kilometres (580 sq mi). The presence of two calderas has been inferred, one at Tankha Tankha in the northern part of the field and one at Condoriri in the southern part of the field. The Tankha Tankha caldera has a resurgent dome which has erupted domes and lava flows. Other volcanic landforms in the field are lava domes. Mines are located at San Pablo, Morococala and Japo.
...
Wikipedia