| Suining Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Sichuan Basin |
| Underlies | Penglaizhen Formation |
| Overlies | Upper Shaximiao Formation |
| Thickness | Several hundred meters |
| Lithology | |
| Primary | Mudstone |
| Other | Sandstone, siltstone |
| Location | |
| Region | Asia |
| Country |  China |
The Suining Formation (simplified Chinese: 遂宁组; traditional Chinese: 遂寧組; pinyin: Suìníng Zǔ) is a geological formation in China whose strata date back to the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation. A 2019 paper shows zircon dating of the Suining Formation with a much younger age for the classically thought of Late Jurassic formation; the average age of the dating being roughly 114 myo or late upper Aptian.[1]
- ^ Wang, Jun; Norell, Mark A.; Pei, Rui; Ye, Yong; Chang, Su-Chin (July 2019). "Surprisingly young age for the mamenchisaurid sauropods in South China". Cretaceous Research. 104: 104176. Bibcode:2019CrRes.10404176W. doi:10.1016/j.cretres.2019.07.006.