Bureya sedimentary basin 

(Early Jurassic (Pliensbachian) to Early Cretaceous - Albian) 

(Northwestern part of Russian Southeast, unit KJs)

Consists chiefly of Jurassic and Cretaceous shallow-marine and nonmarine sandstone, siltstone, and shale. 
Early and Middle Jurassic section mainly marine. Late Middle Jurassic (Callovian) transition to nonmarine 
deposition. Interlayered coal deposits in Late Jurassic and Early Cretaceous part of section. Felsic tuff is 
intercalated throughout Jurassic section. Sedimentary rocks are weakly to undeformed in the western part 
of the basin, but are folded and faulted in the eastern part of the basin. Sedimentary rocks of the basin 
unconformably overlie the Turan and Malokhingansk terranes of the Bureya superterrane. REFERENCE: 
Krasny and others, 1966; Kozlovsky, 1988