Shengjinkou Formation
Stratigraphic range: Early Cretaceous, ~120  Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Two outcrops of the Shengjinkou Formation where the footprints of Pteraichnus wuerhoensis have been discovered. Photographed before 2021.
Type	Geological formation
Unit of	Tugulu Group
Underlies	Lianmuqin Formation
Overlies	Kalaza Formation
Lithology
Primary	Mudstone, siltstone
Location
Coordinates	46°00′N 85°48′E / 46.0°N 85.8°E / 46.0; 85.8
Approximate paleocoordinates	45°00′N 81°54′E / 45.0°N 81.9°E / 45.0; 81.9
Region	Xinjiang Uygur Autonomous Region
Country	China
Extent	Junggar Basin
Type section
Named by	Xia Gongjun
Year defined	1956
Shengjinkou Formation (Dzungaria)

The Shengjinkou Formation is an Early Cretaceous ( Aptian)-aged Konservat-Lagerstätte composed of "interbedded red green and yellow variegated mudstones and siltstones" that is part of the larger Tugulu Group of China. ^{[1] [2]} Dinosaur ^[3] and pterosaur remains have been recovered from the formation. ^{[4] [5]}

The Shengjikou Formation was first identified in a 1956 manuscript by Xia Gongjun. ^[6] The type locality is near Turpan City in the Xinjiang Region of China. ^[5] The first pterosaur and dinosaur remains from the Shengjinkou Formation were identified by 1973, including several skulls belonging to Dsungaripterus weii ^[7] and indeterminate sauropod remains possibly belonging to Asiatosaurus mongoliensis. ^[8]

In 2006 from the Hami region in Xinjiang, the Shengjinkou Formation, a Konservat-Lagerstätte was reported, in this case lake sediments allowing for an exceptional preservation of fossils. The same year, Qiu Zhanxiang and Wang Banyue started official excavations. Part of the finds consisted of dense concentrations of pterosaur bones, associated with soft tissues and eggs. The site represented a nesting colony that storm floods had covered with mud. Dozens of individuals could be secured from a total that in 2014 was estimated to run into the many hundreds. ^[4]

Dinosaur footprints were collected from the formation before 2011 and isolated specimens were collected by the local Moguicheng Dinosaur and Bizarre Stone Museum; ^{[9] [10]} more specimens were discovered between 2015 and 2019. ^[8]

Dinosaur fossils and pterosaur footprints were reported again from the formation in 2021 ^{[3] [11]} and dinosaur footprints were first reported from the formation in 2023. ^[12]

• cf. Asiatosaurus mongoliensis ^{[7] [8]}
• Dsungaripterus weii ^{[7] [8]}
• Noripterus complicidens ^[13]
• cf. Eubrontes ^[12]
• Hamipterus tianshanensis ^[4]
• Hamititan xinjiangensis ^[3]
• Pteraichnus wuerhoensis ^[11]
• Silutitan sinensis ^[3]
• Somphospondyli (?) indet. (= Sauropoda indet.) ^[3]
• Theropoda indet. ^[3]
• Uighuroniscus sinkiangensis ^[14]
• Manasichthys tuguluensis ^[13]
• Manasichthys elongates ^[13]
• Dsungarichthys bilineatus ^[13]
• Bogdaichthys fukangensis ^[13]
• Bogdaichthys serratus ^[13]