New vertebrate and invertebrate remains are reported from the basal deposits （marls, sands and gravels） of Papo-Seco Formation （Lower Barremian, Lower Cretaceous） of Areias do Mastro, nearby Cabo Espichel, Sesimbr...New vertebrate and invertebrate remains are reported from the basal deposits （marls, sands and gravels） of Papo-Seco Formation （Lower Barremian, Lower Cretaceous） of Areias do Mastro, nearby Cabo Espichel, Sesimbra, south of Lisbon. The studied layers were formed in an environment of shallow-marine features （lagoon, estuary）. Recent paleontological inspection generated several vertebrate and invertebrate remains, including shells and trace fossils （casts and molds） of gastropods and bivalves; after examination, there were identified bones and teeth of fish, crocodiles, dinosaurs, pterosaurs and turtle shell fragments. The new data constitute an important contribution to the knowledge of vertebrate paleo-diversity for the environment during the Lower Cretaceous of Portugal.展开更多
This palaeontological study focuses on the sedimentology and palaeofauna of Areia do Mastro locale in Cabo Espichel (Sesimbra, south of Lisbon). Two main geological formations are identified in Areia do Mastro: the Ar...This palaeontological study focuses on the sedimentology and palaeofauna of Areia do Mastro locale in Cabo Espichel (Sesimbra, south of Lisbon). Two main geological formations are identified in Areia do Mastro: the Areia do Mastro Formation and the Papo-Seco Formation. We report herein the fossilized vertebrate and invertebrate remains from the basal deposits (marls, sands and gravels) of Papo-Seco Formation assigned to Lower Barremian (Lower Cretaceous). The sedimentological analysis and identified palaeofauna indicated a changing environment with important biological and ecological aspects. Extensive periods of sea level fluctuations and subsequent transgressive marine episodes had as a result the continental infralittoral internal platform to be gradually replaced by a lagoon, as revealed from the fossil remains embodied in the sediments during the formation of the afore mentioned sedimentary sequences.展开更多
文摘New vertebrate and invertebrate remains are reported from the basal deposits （marls, sands and gravels） of Papo-Seco Formation （Lower Barremian, Lower Cretaceous） of Areias do Mastro, nearby Cabo Espichel, Sesimbra, south of Lisbon. The studied layers were formed in an environment of shallow-marine features （lagoon, estuary）. Recent paleontological inspection generated several vertebrate and invertebrate remains, including shells and trace fossils （casts and molds） of gastropods and bivalves; after examination, there were identified bones and teeth of fish, crocodiles, dinosaurs, pterosaurs and turtle shell fragments. The new data constitute an important contribution to the knowledge of vertebrate paleo-diversity for the environment during the Lower Cretaceous of Portugal.
基金Authors thank Centro Português de Geo-História e Pré-História,for supporting the field and laboratory work,and all the team members who have collaborated in the fieldwork.
文摘This palaeontological study focuses on the sedimentology and palaeofauna of Areia do Mastro locale in Cabo Espichel (Sesimbra, south of Lisbon). Two main geological formations are identified in Areia do Mastro: the Areia do Mastro Formation and the Papo-Seco Formation. We report herein the fossilized vertebrate and invertebrate remains from the basal deposits (marls, sands and gravels) of Papo-Seco Formation assigned to Lower Barremian (Lower Cretaceous). The sedimentological analysis and identified palaeofauna indicated a changing environment with important biological and ecological aspects. Extensive periods of sea level fluctuations and subsequent transgressive marine episodes had as a result the continental infralittoral internal platform to be gradually replaced by a lagoon, as revealed from the fossil remains embodied in the sediments during the formation of the afore mentioned sedimentary sequences.
