Volcán Lomas Blancas is a small and young shield-like stratovolcano located about 15 km SE of Nevado de Longaví volcano. It has a 2.3-km-wide caldera, possibly formed by edifice collapse. The caldera is open to the SE where basaltic-andesite aa lava flows extend 7 km from the collapse scarp. The basaltic central cone rises about 500 m from its base. Much of the volcano is covered by pumice deposits that probably originated from Nevado de Longaví. --- Source: GVP