Quebrada Monardes Formation
| Quebrada Monardes Formation | |
|---|---|
| Stratigraphic range: Early Cretaceous | |
| Type | Geological formation |
| Sub-units | Codocedo Limestone Member |
| Underlies | Quebrada Seca Formation |
| Overlies | Lautaro Formation, Pedernales Formation |
| Lithology | |
| Primary | Sandstone |
| Other | Pebbly sandstone, conglomerate, mudstone, non-marine evaporite, limestone |
| Location | |
| Region | Atacama Region |
| Country | Chile |
The Quebrada Monardes Formation is a geological formation in Chile dating back to the Early Cretaceous. It was deposited in warm, arid to semi-arid conditions. One portion (the Codocedo Limestone Member) preserves a perennial salt lake covering at least 1,500 square kilometres (580 sq mi); this lake dried up, leaving a large area of mudflats. Fossils of iguanodontian dinosaurs and ctenochasmatid pterosaurs have been found in the formation.