K♯°/AR♯° age dating on glauconites and paleontologic interpretation near the Cretaceous-Tertiary transition in Texas.

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dc.contributor.advisorAdams, John A. S.en_US
dc.contributor.committeeMemberCasey, Richard E.en_US
dc.contributor.committeeMemberClark, Howard C.en_US
dc.creatorGammill, Laura M.en_US
dc.date.accessioned2018-12-18T21:15:47Zen_US
dc.date.available2018-12-18T21:15:47Zen_US
dc.date.issued1984en_US
dc.description.abstractSeveral exposures of the Cretaceous-Tertiary contact in Texas were searched for material suitable for radiometric age dating. Glauconites from Littig Pit, Travis County, Texas were sufficient in quality and quantity. K4/Ar4 dating on glauconites from Littig Pit indicates that 4 to 6 Ma of lowermost Tertiary section are missing. At least one nannofossil zone and at least two foraminiferal zones missing from the lowermost Tertiary limit the unconformity to 2.5 to 5 Ma. The concordant radiometric and paleontologic dates refute the view of Odin that all low potassium glauconites are suspect. The uppermost Cretaceous represents an undetermined amount of time. It is possible that the Midway Group was deposited rapidly during the last major Paleocene transgression of Vail et al (1977). The data supports the conclusion of Berggren and Aubert (1975) that the Midway fauna are correlatable worldwide. The iridium layer of Alvarez et al (1982) is missing at the Littig Pit, confirming missing section and illustrating how this iridium layer may be used as a worldwide time marker.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent105 ppen_US
dc.identifier.callnoThesis Geol. 1984 Gammillen_US
dc.identifier.citationGammill, Laura M.. "K♯°/AR♯° age dating on glauconites and paleontologic interpretation near the Cretaceous-Tertiary transition in Texas.." (1984) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/103973">https://hdl.handle.net/1911/103973</a>.en_US
dc.identifier.digitalRICE1599en_US
dc.identifier.urihttps://hdl.handle.net/1911/103973en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleK♯°/AR♯° age dating on glauconites and paleontologic interpretation near the Cretaceous-Tertiary transition in Texas.en_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentEarth Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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