Central Okhotsk sedimentary basin 

(Cenozoic) 

(Sea of Okhotsk, unit Czs)

Consists chiefly of a Pliocene to Quaternary sedimentary basin that is up to 4 km thick. Contains an upper 
subhorizontal unit and unconformably underlying lower unit that fills narrow grabens. REFERENCE: 
Baboshina and others, 1985.