How old is the currently active shield volcano located in the Kaʻ ū Desert?
Kaʻū Desert The Kaʻ ū Desert is a leeward desert in the district of Kaʻ ū, the southernmost district on the Big Island of Hawaii, and is made up mostly of dried lava remnants, volcanic ash, sand and gravel. The desert covers an area of the Kīlauea Volcano along the Southwest rift zone. The area lacks any vegetation, mainly due to acid rainfall.
Tantalus (Oahu) Mount Tantalus (Puu-ohia), is an extinct cinder cone in the southern Koʻ olau Range on the Hawaiian Island of Oʻ ahu. It also has a summit crater, Tantalus Crater. The cinder cone formed after the demise of Koʻ olau Volcano, during a time of rejuvenated stage volcanism in southeastern Oʻ ahu that also formed Punchbowl Crater, Diamond Head and Koko Head. Tantalus overlooks the modern city of Honolulu, which is built on top of Tantalus cinders.