Places Nevado del Ruiz
The Nevado del Ruiz, also known as Mesa de Herveo, 4 and in pre-Columbian times as Cumanday, Tabuchía and Tama, 1 is the northernmost volcano of the Andes volcanic belt, located on the border between the departments of Caldas and Tolima, in Colombia. It is a stratovolcano composed of many layers of lava alternating with hardened volcanic ash and other pyroclasts. It has been active for about two million years, from early Pleistocene or late Pliocene, with three major eruptive periods. The formation of the volcanic cone formed during the course of the current eruptive period began 150 thousand years ago.