Honolulu Volcanic Series

The Honolulu volcanic series is a set of monogenetic volcanic events on the Hawaiian island of Oahu. The events, which have been dated to between 800,000 and 30,000 years before the present, created several notable island features, including Diamond Head, the Punchbowl Crater, Hanauma Bay, Mānana Island and the youngest, Koko Crater. Most people don't consider those craters as volcanoes. They are thought to be extinct vents of the Ko'olau Range.

The composition of this volcanic outflow is significantly different from that of the older eruptions that created most of the island.