Kamchatka-Koryak volcanic belt 

(Lesser Late Cretaceous and mainly Paleocene, Eocene, and Miocene) 

(Kamchatka Peninsula and eastern Russian Northeast, units eTvi, eTvm, eTs, mTvi, mTvf)

Extends for 800 km parallel to but mainly east of the northern part of the Okhotsk-Chukotka volcanic-
plutonic belt. Occurs in discontinuous and isolated volcanic fields and consists of gently dipping 
nonmarine volcanic rocks of various compositions, and sandstone, gritstone, and conglomerate with flora. 
Lower part consists of mafic volcanic rocks, mainly Maastrichtian-Danian tholeiitic basalt, along with 
abundant Paleocene to Eocene alkali basalt, and associated and minor diorite, monzonite, gabbro, 
granodiorite, and granite that yield K-Ar ages of 56-73 Ma. Upper part consists of calc-alkalic dacite, 
rhyolite, andesite, and basalt with late Eocene-early Miocene flora and K-Ar ages, and associated with 
subvolcanic bodies and dikes of rhyolite, granodiorite, and diorite. REFERENCES: Filatova, 1988; 
Zinkevich, 1981.