Volcano Event

Volcanoes would be an event that can vary from a cinder cone, shield or a composite volcano. The different types of volcanoes would have differing eruptions only when during the events. A shield volcano would have a quiet eruption. A cinder cone would have a explosive eruption (maybe add pyroclastic flow). The stratovolcano (composite) would have both eruptions but there could be a 50% chance for either during the event. The volcanoes would be dormant when events are inactive and there could also be extinct volcanoes that do not erupt. To prevent the volcanoes from erupting, there could be items (maybe totems) you could find from archeological sites and maybe have to throw the item in the volcano or place it somewhere in it. This would cancel the event and reset the timer for the next event. In this way, you get to choose whether or not you want to volcano to erupt or not.