Investigation of K-Pg Boundary Sand Bodies At Moscow Landing Alabama, Via U-Pb Geochronology: Implications for End-Cretaceous Paleodrainage and the Chicxulub Impact

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dc.contributor Tobin, Thomas
dc.contributor Wielicki, Michelle
dc.contributor Savrda, Charles
dc.contributor.advisor Wielicki, Matthew
dc.contributor.author Culp, Ryan Patrick
dc.date.accessioned 2022-02-04T20:16:39Z
dc.date.available 2022-02-04T20:16:39Z
dc.date.issued 2021
dc.identifier.other http://purl.lib.ua.edu/181729
dc.identifier.other u0015_0000001_0004019
dc.identifier.other Culp_alatus_0004M_14680
dc.identifier.uri http://ir.ua.edu/handle/123456789/8294
dc.description Electronic Thesis or Dissertation
dc.description.abstract Moscow Landing is a well-known Cretaceous-Paleogene (K-Pg) boundary site located in eastern Sumter County Alabama USA and serves as a natural laboratory to study the end-Cretaceous mass extinction given its proximity to the Chicxulub impact. Unique, discontinuous, sand bodies, commonly known as the Clayton sands, mark the contact between Cretaceous and Paleogene rocks. Megawaves generated by the Chicxulub impact and incised valley filling have been cited as the possible mechanisms behind Clayton sand deposition. To further investigate the source of the sediment in the Clayton sands, a multidisciplinary approach is used that involves microscopy (SEM analysis), geochemistry (trace element and major oxides), and detrital zircon U-Pb geochronology. This work represents the first wherein U-Pb geochronological tools have been applied to a K-Pg site in Alabama. Zircon ages reveal an Appalachian-derived sediment signature, with four grains of ~550 Ma possibly indicating a Chicxulub impact-derived source (i.e. Pan-African in age). Shock features within the zircons were not observed, possibly indicating that the ejecta blanket at Moscow Landing was erased or diluted by the subsequent megawave surge as previous research suggests. In addition, the detrital zircon data presented corroborate previous studies in suggesting that the ancestral Mississippi River system was draining large portions of North America at the end-Cretaceous into the Gulf of Mexico as it does today.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.ispartof Supplementary materials include Excel spreadheets with Moscow landing XRF and U-Pb data and a zipped folder containing Moscow landing SEM data. 1
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Chicxulub impact
dc.subject.other Cretaceous
dc.subject.other K-Pg
dc.subject.other paleodrainage
dc.subject.other U-Pb geochronology
dc.subject.other zircon
dc.title Investigation of K-Pg Boundary Sand Bodies At Moscow Landing Alabama, Via U-Pb Geochronology: Implications for End-Cretaceous Paleodrainage and the Chicxulub Impact
dc.type thesis
dc.type text
etdms.degree.department University of Alabama. Department of Geological Sciences
etdms.degree.discipline Geochemistry
etdms.degree.grantor The University of Alabama
etdms.degree.level master’s
etdms.degree.name M.S.


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