Ejinhoro Formation

The Ejinhoro Formation (simplified Chinese: 伊金霍洛组; traditional Chinese: 伊金霍洛組; pinyin: Yījīnhuòluò Zǔ) is a geological formation in Inner Mongolia, north China, whose strata date back to the Early Cretaceous period (Barremian).^[1]

Ejinhoro Formation
Stratigraphic range: Early Cretaceous Barremian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Lithology
Primary	Sandstone
Other	Mudstone, siltstone
Location
Coordinates	39.4°N 108.4°E / 39.4; 108.4
Approximate paleocoordinates	40.5°N 105.5°E / 40.5; 105.5
Region	Inner Mongolia
Country	China
Extent	Ordos Basin
Ejinhoro Formation (China) Show map of China Ejinhoro Formation (Inner Mongolia) Show map of Inner Mongolia

Dinosaur remains are among the fossils that have been recovered from the formation.^[2]

Fossil content

Mammals

Mammals
Taxa	Presence	Notes	Images
Genus: Hangjinia[3] H. chowi	A single dentary[3]	A gobiconodontid

Dinosaurs

Dinosaurs
Taxa	Presence	Notes	Images
Genus: Chiayusaurus C. sp.	Isolated teeth.	A sauropod.	Sinornithoides Wuerhosaurus
Psittacosaurus P. neimongoliensis P. ordosensis		A ceratopsian. "[One] nearly complete skeleton and other fragmentary material."[4] "Partial cranial material."[4]
Saurischia indeterminate		A large saurischian.
Sinornithoides S. youngi	"Near-complete articulated skeleton."[5]	A troodontid.
Stegosauridae indeterminate	Isolated teeth.	A stegosaurid.
Wuerhosaurus W. ordosensis		A large stegosaurid. "Partial skeleton, plate, vertebra, adult."[6]

Pterosaurs

Indeterminate pterosaur remains have also been recovered from the formation.^[7]

See also

• List of dinosaur-bearing rock formations