Microfossil Samples from the East Pisco Basin, southern Peru
Dates
Publication Date
2024-04-16
Start Date
1980
End Date
2022
Citation
McDougall, K., Ragan, B.A., Barron, J.A., and DeVries, T.J., 2024, Microfossil Samples from the East Pisco Basin, southern Peru: U.S. Geological Survey data release, https://doi.org/10.5066/P14MCW6B.
Summary
The East Pisco Basin is one of several forearc basins situated on the coastal plain of Peru between the Andean Cordillera and Peru-Chile Trench. During the Cenozoic, successive marine transgressions across the East Pisco Basin deposited sequences of Paleogene and Neogene age. Biochronologic studies suggest that a hiatus of approximately 12 million years (~32-20 Ma) separates the youngest Paleogene deposits from the oldest Neogene deposits. A newly recognized lower Miocene sequence, provisionally named the Tunga Formation, shortens that hiatus. The following database provides location and description of samples from the East Pisco Basin, checklists of microfossil assemblages, and taxonomic notes for those assemblages.
Summary
The East Pisco Basin is one of several forearc basins situated on the coastal plain of Peru between the Andean Cordillera and Peru-Chile Trench. During the Cenozoic, successive marine transgressions across the East Pisco Basin deposited sequences of Paleogene and Neogene age. Biochronologic studies suggest that a hiatus of approximately 12 million years (~32-20 Ma) separates the youngest Paleogene deposits from the oldest Neogene deposits. A newly recognized lower Miocene sequence, provisionally named the Tunga Formation, shortens that hiatus. The following database provides location and description of samples from the East Pisco Basin, checklists of microfossil assemblages, and taxonomic notes for those assemblages.
Microfossil Samples from the East Pisco Basin, southern Peru.mpkx
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Material Request Instructions
Access to samples with USGS reference numbers (Mf#####) can be attained by contacting the lab manager.
Purpose
This geodatabase was compiled to allow for the visualization of spacial relationships of the sampling locations. Sampling originally ocurred in an attempt to identify the original depositional environment of the strata in the study area.
An aggregation of sampling points collected by Thomas J. DeVries and José Macharé allowing for the characterization and interpretation of the units composing the East Pisco Basin of Peru.
