| Meng-Yin Formation | |
| Type: | Geological formation |
| Age: | Berriasian-Valanginian ~ |
| Period: | Valanginian |
| Prilithology: | Sandstone |
| Otherlithology: | Siltstone |
| Region: | Shandong |
| Country: |  China |
| Coordinates: | 35.9°N 118°W |
| Paleocoordinates: | 36.9°N 120.2°W |
The Meng-Yin or Mengyin Formation is a geological formation in Shandong, China, whose strata date back to the Berriasian and Valanginian stages of the Early Cretaceous.[1] [2]
Dinosaur remains are among the fossils that have been recovered from the formation.[3] The type material for the titanosauriform dinosaur Euhelopus was excavated at this formation by Otto Zdansky in 1923, in green/yellow sandstone and green/yellow siltstone that were deposited during the Barremian or Aptian stages of the Cretaceous period, approximately 129 to 113 million years ago.[4]
Both the genus and species of Mengyinaia mengyinensis were named after the formation.
Indeterminate stegosaurid remains have been found in Shandong, China.
| Vertebrates from the Meng-Yin Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Euhelopus | E. zdanskyi | Shandong | "Skull and partial postcranial skeleton, additional fragmentary skeleton."[5] | |||
| Mengshanosaurus | M. minimus | A single juvenile skull | A choristodere belonging to Neochoristodera | |||