Deryugin sedimentary basin 

(Cenozoic) 

(Sea of Okhotsk, unit Czs)

Consists chiefly of a late Oligocene to Quaternary sedimentary basin that is up to 6,000 m thick as 
interpreted from seismic-reflection data. Basin interpreted to be filled with marine shale, clastic, and 
siliceous sedimentary rocks. Western part of the basin is the deepest and is intensely deformed with 
deformation of sedimentary rocks increasing with depth. A chain of positive heat flow anomalies are 
present along the elongated axis of the basin. The thickness of the crust below the basin is estimated at 21-
23 km with a relatively thin continental crustal (granitic?) layer. REFERENCES: Mavrinsky and others, 
1979; Zhuravlyov, 1984; Baboshina and others, 1984, 1985.