The Qiketai Formation is a geological formation in

Xinjiang Xinjiang,; , SASM/GNC romanization, SASM/GNC: Chinese postal romanization, previously romanized as Sinkiang, officially the Xinjiang Uygur Autonomous Region (XUAR), is an Autonomous regions of China, autonomous region of the China, People' ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

. It is found within the Turpan-Hami Basin. It is roughly equivalent in age to the nearby

Toutunhe Formation The Toutunhe Formation is a Late Jurassic geological formation in China, specifically dating to the Oxfordian and Kimmeridgian stages. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the format ...

and Wucaiwan Formation of the Southern and Northern

Junggar Basin The Junggar Basin (), also known as the Dzungarian Basin or Zungarian Basin, is one of the largest sedimentary basins in Northwest China. It is located in Dzungaria in northern Xinjiang, and enclosed by the Tarbagatai Mountains of Kazakhstan in t ...

, respectively. Tuffites within the unit have been dated to the

Callovian In the geologic timescale, the Callovian is an age and stage in the Middle Jurassic, lasting between 165.3 ± 1.1 Ma (million years ago) and 161.5 ± 1.0 Ma. It is the last stage of the Middle Jurassic, following the Bathonian and preceding the ...

stage of the

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately 143.1 Mya. ...

approximately 164.6 ± 1.4 ma. The dinosaur ''

Xinjiangtitan ''Xinjiangtitan'' ( zh, s=新疆巨龙, p=Xīnjiāngjùlóng) is an extinct genus of mamenchisaurid sauropod that lived during the Middle Jurassic of what is now Xinjiang, northwestern China. Its type and only species is ''Xinjiangtitan shanshan ...

'' is known from the formation.

References

{{Geologic-formation-stub Jurassic System of Asia Callovian Stage Jurassic China