The Brazos River area is located at the entrance of the former Western Interior Seaway on the shallow northern Gulf of Mexico shelf. Marine sediments in the region were deposited in
a middle to outer shelf environment. Outcrops on the Brazos River in the Falls County area of Texas record nearly continuous and predominantly siliciclastic sedimentation during the Late
Cretaceous and early Paleogene. The Cretaceous-Paleogene (K-Pg) boundary there, as well as the Upper Cretaceous and Paleogene sediments around it, are clay-rich marls with excellent
preservation. The main goal of this study is to document the well-preserved Upper Cretaceous (Campanian-Maastrichtian) nannofossils with a low resolution look across the K-Pg boundary into
the lowest Paleocene sediments. In this study, seven outcrop sections from the Upper Cretaceous Marlbrook, Neylandville and Corsicana Formations and the lower part of the Danian Kincaid
Formation from the Brazos River area were examined for calcareous nannofossils. The nannofossil assemblages are abundant and diverse in the Campanian and Maastrichtian sections, and
abundant with low diversity in the lower Danian. The samples yielded 6 biozones defined by 7 nannofossil datums. Of these datums, five first occurrences (FO), one last occurrence (LO) and
one first occurrence acme were observed. Based on quantitative analysis 54 genera and 108 species were identified in this study. / A Thesis submitted to the Department of Earth, Ocean and Atmospheric Sciences in partial fulfillment of the Master of Science. / Fall Semester 2015. / November 13, 2015. / Biostratigraphy, Brazos River, Campanian, Maastrichtian, Nannofossils, Texas / Includes bibliographical references. / Sherwood W. Wise, Jr, Professor Directing Thesis; Yang Wang, Committee Member; William C. Parker, Committee Member; John V. Firth, Committee
Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_291345 |
| Contributors | Unlu, Seher (authoraut), Wise, Sherwood W. (professor directing thesis), Wang, Yang (committee member), Parker, William C., 1952- (committee member), Firth, John, 1953- (committee member), Florida State University (degree granting institution), College of Arts and Sciences (degree granting college), Department of Earth, Ocean, and Atmospheric Science (degree granting department) |
| Publisher | Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource (81 pages), computer, application/pdf |
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