Suining Formation
| 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.