Pu‘u Kanakaleonui is one of the younger cones of the Laupahoehoe Volcanics and is less than 13,000 years in age. The dark-colored deposit partly surrounding and mantling Pu‘u Kanakaleonui consists of tephra and ejecta blocks of lava mostly 10 to 50 cm in diameter but as large as 3 m long. Some of the ejecta are from underlying lava flows that were erupted more than 65,000 years ago from the Hamakua Volcanics. The light-colored surface below the cone consists of lava flows that are not mantled by the explosive tephra and blocks. Mauna Loa visible in upper left.