No eruptions of Coropuna during historical or modern times are known, and the volcano was considered to be long-extinct. However, young-looking ʻaʻā lava or block lava flows erupted during the Holocene and in part overlie late-glacial moraines. Their vents are now hidden beneath glacier ice and the flows have been affected by later glacial advances. These lava flows are found on the west-northwest, south-southeast and northeast side of the mountain: