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Geological formation in 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.
Color key
Notes Uncertain or tentative taxa are in small text ; crossed out taxa are discredited.
Ornithopods of the Quebrada Monardes Formation
Genus
Species
Location
Stratigraphic position
Material
Notes
Images
Iguanodontia Indet.
Indeterminate
Pterosaurs of the Quebrada Monardes Formation
Genus
Species
Location
Stratigraphic position
Material
Notes
Images
Ctenochasmatidae Indet.
Indeterminate
^ 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 .