PALEOENVIRONMENTAL MODEL FOR THE LATE CENOZOIC OF SOUTHWESTERN AMAZONIA: PALEONTOLOGY AND GEOLOGY

Acta Amazonica

Edgardo Μ. Latrubesse¹  Jean Bocquentin¹  José Carlos R. Santos¹  Carlos G. Ramonell¹ 

关键词: Amazonia;    Sedimentary model;    Megafan;    Vertebrate Paleontology;    Mio-Pliocene;    Amazônia;    Modelo Sedimentar;    Megaleque;    Paleontologia de Vertebrados;    Mio-Plioceno;   

DOI  :  10.1590/1809-43921997272118

来源: SciELO

【 摘 要 】

Our study provides paleontological and geological data substantiating a paleoenvironmental model for the upper Miocene-Pliocene of Southwestern Amazonia. The extensive Late Tertiary sediments of The Solimões Formation, outcropping in Southwestern Amazonia, were deposited by a complex megafan system, originating in the high Peruvian Andes. The megafan system was the sedimentological response to the Andean Quechua tectonic phase of Tertiary age, producing sediments that fdled the foreland basin of Southwestern Amazonia. Occurrences of varied vertebrate fossil assemblages of the Huayquerian-Montehermosan Mammal age collected in these sediments support this interpretation. The fauna includes several genera and species of fishes, reptiles, birds, mammals and appears to be one that could have lived in or near a riverine habitat. In the Late Pliocene, the megafan system became inactive as a result of the influence of the Diaguita Tectonical Phase.

【 授权许可】

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