Meng-Yin Formation
| Meng-Yin Formation | |
|---|---|
| Stratigraphic range: Berriasian-Valanginian ~ | |
| Type | Geological formation |
| Lithology | |
| Primary | Sandstone |
| Other | Siltstone |
| Location | |
| Coordinates | 35°54′N 118°00′E / 35.9°N 118.0°E |
| Approximate paleocoordinates | 36°54′N 120°12′E / 36.9°N 120.2°E |
| Region | Shandong |
| Country | China |
The Meng-Yin or Mengyin Formation (simplified Chinese: 蒙阴组; traditional Chinese: 蒙陰組; pinyin: Méngyīn Zǔ) is a geological formation in Shandong, China, whose strata date back to the Berriasian and Valanginian stages of the Early Cretaceous.
Dinosaur remains are among the fossils that have been recovered from the formation. 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.
Both the genus and species of Mengyinaia mengyinensis were named after the formation.