| 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.[1] 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.[1][2] Fossils of iguanodontian dinosaurs[3] and ctenochasmatid pterosaurs[1][4] have been found in the formation.
- ^ a b c Alarcón-Muñoz, Jhonatan; Soto-Acuña, Sergio; Codorniú, Laura; Rubilar-Rogers, David; Sallaberry, Michel; Suárez, Manuel (2020-06-01). "New ctenochasmatid pterosaur record for Gondwana: discovery in the Lower Cretaceous continental deposits of the Atacama Desert, northern Chile". Cretaceous Research. 110: 104378. doi:10.1016/j.cretres.2020.104378. ISSN 0195-6671.
- ^ Bell, C. M.; Suarez, M. (July 1993). "The depositional environments and tectonic development of a Mesozoic intra-arc basin, Atacama Region, Chile". Geological Magazine. 130 (4): 417–430. doi:10.1017/S0016756800020501. ISSN 0016-7568.
- ^ Alarcón-Muñoz, Jhonatan; Cruzado-Caballero, Penélope; Vicencio Campos, Omar; Bravo-Ortiz, Claudio; Vargas Bugueño, Erick; Bajor, Dániel; Suárez, Mario E.; Guevara, Juan Pablo; Vargas, Alexander O.; Rubilar-Rogers, David (2025-01-01). "Lower Cretaceous iguanodontian dinosaurs from the southwestern margin of Gondwana". Cretaceous Research. 165: 105983. doi:10.1016/j.cretres.2024.105983. ISSN 0195-6671.
- ^ Alarcón-Muñoz, Jhonatan; Codorniú, Laura; González, Edwin; Suárez, Mario E.; Suárez, Manuel; Vicencio-Campos, Omar; Soto-Acuña, Sergio; Kaluza, Jonatan; Vargas, Alexander O.; Rubilar-Rogers, David (2022-07-01). "A new locality with ctenochasmatid pterosaurs (Pterosauria: Pterodactyloidea) in the Atacama Desert, Northern Chile". Cretaceous Research. 135: 105173. doi:10.1016/j.cretres.2022.105173. ISSN 0195-6671.