Prehistorical littoral cones have been found on the coast of Hawaii, where the volcanoes Mauna Loa and Kilauea face the sea. They were named littoral cones by Wentworth in 1938. About 50 large cones are found on these two volcanoes and only three of them were formed during historical times; no such cones have been found on the other Hawaiian volcanoes. The Puu Oo and Mauna Ulu eruptions of Kilauea have also formed small littoral cones.