West-Kamchatka sedimentary basin 

(Paleogene and Neogene) 

(Western Kamchatka Peninsula and adjacent Sea of Okhotsk, unit Czs)

Consists chiefly of thick, gently folded, littoral-marine and nonmarine Cenozoic coal-bearing deposits up 
to 6-km thick. Basin contains major, linear, en-echelon folds occur diagonal to general strike of basin. 
Basin extends for about 650 km and is interpreted as a backarc basin for the central Kamchatka volcanic 
belt to east. REFERENCES: Vlasov, 1964, 1977.