Oahu, Hawaii
21.42 N, 158.17 W
summit elevation 1200 m
Shield volcano
Waianae volcano is the older volcano which makes up the western part of Oahu.
Further reading
Coombs, Michelle L., et al. "Growth and collapse of Waianae Volcano, Hawaii, as revealed by exploration of its submarine flanks." Geochemistry, Geophysics, Geosystems 5.8 (2004).
Presley, T.K., Sinton, J.M. and Pringle, M., 1997. Postshield volcanism and catastrophic mass wasting of the Waianae Volcano, Oahu, Hawaii. Bulletin of Volcanology, 58(8), pp.597-616.
Zbinden, E.A. and Sinton, J.M., 1988. Dikes and the petrology of Waianae Volcano, Oahu. Journal of Geophysical Research: Solid Earth, 93(B12), pp.14856-14866.
2.4 million years ago