Kuril volcanic arc 

(early Miocene to Holocene) 

(Kamchatka Peninsula, unit QTvi)

Consists chiefly of four assemblages: (1) green tuff (early to middle Miocene); (2) volcanic-cherty-
diatomaceous rocks (late Miocene to early Pliocene); (3) basalt (late Pliocene); and (4) andesite and 
associated rocks that form Quaternary active volcanoes. Associated local hypabyssal and plutonic rocks, 
gabbro, diorite, and diabase. REFERENCE: Piskunov, 1987.