Bostobe Formation
The Bostobe Formation (Kazakh: Boztóbe svıtasy) is a geological formation in Qaraghandy & Qyzylorda, Kazakhastan whose strata date back to the Late Cretaceous (Santonian to early Campanian stages, approximately 85 Ma).
| Bostobe Formation | |
|---|---|
| Stratigraphic range: Santonian-early Campanian ~ | |
| Type | Geological formation |
| Underlies | Akzhar Formation |
| Overlies | Zhirkindek Formation |
| Thickness | About 45 m (148 ft) |
| Lithology | |
| Primary | Sandstone |
| Other | Claystone |
| Location | |
| Coordinates | 45.9°N 64.7°E |
| Approximate paleocoordinates | 38.7°N 58.0°E |
| Region | Qaraghandy & Qyzylorda |
| Country | Kazakhstan |
| Type section | |
| Named for | Bostobe River |
Bostobe Formation (Kazakhstan) | |
The sandstones and claystones of the formation were deposited in estuarine, fluvial-lacustrine and fluvial-deltaic environments.
Dinosaur remains are among the fossils that have been recovered from the formation. The formation is about 45 metres (148 ft) thick and consists primarily of clay with interbeds of sand, representing an estuarine environment.
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