Lithostratigraphic and magnetostratigraphic data from late Cenozoic glacial and proglacial sequences underlying the Altiplano at La Paz, Bolivia

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dc.contributor.authorRoberts, Nicholas J.
dc.contributor.authorBarendregt, René W.
dc.contributor.authorClague, John J.
dc.date.accessioned2021-11-09T23:58:00Z
dc.date.available2021-11-09T23:58:00Z
dc.date.issued2018
dc.descriptionOpen access article. Creative Commons Attribution 4.0 International License (CC BY 4.0) applies.en_US
dc.description.abstractWe provide lithostratigraphic and magnetostratigraphic data derived from a Plio-Pleistocene continental sediment sequence underlying the Altiplano plateau at La Paz, Bolivia. The record comprises six sections along the upper Río La Paz valley, totaling over one kilometre of exposure and forming a ~20-km transect oblique to the adjacent Cordillera Real. Lithostratigraphic characterization includes lithologic and stratigraphic descriptions of units and their contacts. We targeted gravel and diamicton units for paleomagnetic sampling to address gaps in the only previous magnetostratigraphic study from this area. Paleomagnetic data – magnetic susceptibility and primary remanent magnetization revealed by progressive alternating field demagnetization – are derived from 808 individually oriented samples of flat-lying, fine-grained sediments. The datasets enable characterization of paleo-surfaces within the sequence, correlation between stratigraphic sections, and differentiation of asynchronous, but lithologically similar units. Correlation of the composite polarity sequence to the geomagnetic polarity time scale supports a range of late Cenozoic paleoenvironmental topics of regional to global importance: the number and ages of early glaciations in the tropical Andes; interhemispheric comparison of paleoclimate during the Plio-Pleistocene climatic transition; timing of and controls on inter-American faunal exchange; and the variability of Earth's paleomagnetic field.en_US
dc.description.peer-reviewYesen_US
dc.identifier.citationRoberts, N. J., Barendregt, R. W., & Clague, J. J. (2018). Lithostratigraphic and magnetostratigraphic data from late Cenozoic glacial and proglacial sequences underlying the Altiplano at La Paz, Bolivia. Data in Brief, 19, 965-987. https://doi.org/10.1016/j.dib.2018.05.038en_US
dc.identifier.urihttps://hdl.handle.net/10133/6089
dc.language.isoen_USen_US
dc.publisherElsevieren_US
dc.publisher.departmentDepartment of Geography and Environmenten_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionSimon Fraser Universityen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.publisher.urlhttps://doi.org/10.1016/j.dib.2018.05.038en_US
dc.subjectPlio-Pleistocene transitionen_US
dc.subjectMid-Piacenzian warm perioden_US
dc.subjectGlacial stratigraphyen_US
dc.subjectCentral Andesen_US
dc.subjectMagnetostratigraphyen_US
dc.subjectDetrital remanent magnetizationen_US
dc.subject.lcshSouth America
dc.subject.lcshAndes
dc.subject.lcshAltiplano
dc.subject.lcshPaleomagnetism
dc.subject.lcshMagnetic susceptibility
dc.subject.lcshLa Paz (Bolivia)
dc.titleLithostratigraphic and magnetostratigraphic data from late Cenozoic glacial and proglacial sequences underlying the Altiplano at La Paz, Boliviaen_US
dc.typeArticleen_US
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