Earth:Ejinhoro Formation

Ejinhoro Formation Stratigraphic range: Aptian-Albian 113 Ma PreЄ Є O S D C P T J K Pg N ↓
Type	Geological formation
Lithology
Primary	Sandstone
Other	Mudstone, siltstone
Location
Coordinates
Paleocoordinates	[ ⚑ ] 40.5°N 105.5°E / 40.5; 105.5
Region	Inner Mongolia
Country	China
Extent	Ordos Basin

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 (Aptian/Albian age.

Dinosaur remains are among the fossils that have been recovered from the formation.

Fossil content

Mammals

Mammals
Taxa	Presence	Notes	Images
Genus: Hangjinia H. chowi	A single dentary	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." "Partial cranial material."
Saurischia indeterminate		A large saurischian.
Sinornithoides S. youngi	"Near-complete articulated skeleton."	A troodontid.
Stegosauridae indeterminate	Isolated teeth.	A stegosaurid.
Wuerhosaurus W. ordosensis		A large stegosaurid. "Partial skeleton, plate, vertebra, adult."

Pterosaurs

Indeterminate pterosaur remains have also been recovered from the formation.

See also

• List of dinosaur-bearing rock formations