Extinct Volcanoes-Auvergne-Vienne-Agde-Eyfel-Italy-Lacus
Cimini-Grotto del Cane-Guevo Upas-Talaga Bodas-The Dead Sea.
There are two sorts of extinct volcanoes: first, those in which all evidences of activity have entirely ceased; and, secondly, those in which a subdued state of activity lingers. The former are more widely distributed than the