Several eruptions have created the Descabezado Chico volcano, which consists of four overlapping volcanic craters, where the last eruption occurred during Holocene time, and produced a lava flow that extends for 30 kilometers; additionally,  springs are as old as 0.3 mya and may have formed directly after Calabozos's second eruption as a result of uplift caused by re-occurring activity in the caldera.
Calabozos is a Holocene caldera in central Chile's Maule Region (7th Region). On the southwestern edge several eruptions have created the Descabezado Chico volcano (elevation: 3,250 metres (10,663 ft)) which consists of four overlapping volcanic craters. The last eruption occurred during Holocene time, and produced a lava flow (2.5 cubic kilometres (1 cu mi) in volume) that extends for 30 kilometres (19 mi). The springs are as old as 0.3 mya, and may have formed directly after Calabozos's second eruption as a result of uplift caused by re-occurring activity in the caldera. 
