 Lava domes and flows are composed of trachyte and the cinder cones consist of basaltic and trachybasaltic lava.The most recently formed cone is well preserved and might have a similar age to the 7,200‑year‑old Nazko Cone at the easternmost end of the Anahim Volcanic Belt.However, recent (2015) argon-argon dating by Kuehn "et al."