Pu’u Olai is a scoria cone on the west flank of Haleakalā that formed during the late-stage Hana Series eruptions, which produced a large number of scoria cones and lava flows along the SW and E rift zones.
Photo by Lee Siebert, 1987 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.
Keywords: scoria cone
Haleakala