Russia, Khabarovsk Territory, small Khekhtsir range. Dark gray siltstones with interlayers (up to 10 cm thick) of greenish-gray fine-grained polymictic sandstones. Pionerskaya series. Thickness - 500 metres. Lower Cretaceous. Valanginian.
Russia, Khabarovsk Territory. Dark gray, gray siltstones with interbeds of sandstones. Pionerskaya series. Thickness - 800 metres. Lower Cretaceous. Valanginian.