 The last known eruption, as determined by radiocarbon dating, occurred about 1,600 years ago.The crater of The Quill contains a lush rainforest populated by native and introduced tropical trees and plants.These include elephant ears, tree ferns, begonias, figs, plantains, bananas, bromeliads, trumpet wood, mahogany, seedless breadfruit, Surinam cherry, ginger bush and edible raspberries, as well as at least 17 different kinds of orchids.