10Be/9Be and 26Al/10Be support a late Miocene burial age for basal Gray Fossil Site sediments
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Abstract
We provide 2 independent radioisotopic age estimates for cored basal sediments of the Gray Fossil Site using cosmogenic nuclides. The first estimate uses meteoric 10Be/9Be from the bottom of the GFS-1 core, as well as from modern local grasses, to constrain the deposition of basal GFS sinkhole complex sediments to 6.60 ± 0.85 Ma. We corroborated this age estimate using in-situ 10Be and 26Al in quartz sands from the GFS-1 core. This estimate provided a looser constraint than the 10Bemet/9Be approach, yielding a minimum burial age for the basal sediments of 4.43 ± 0.34 Ma. These independent geochronometers provide evidence that the deepest GFS sediments are at least early Pliocene in age, and likely date to the late Miocene.
Suggested Citation
Odom, W.E., Granger, D.E., Wallace, S.C., 2025, 10Be/9Be and 26Al/10Be support a late Miocene burial age for basal Gray Fossil Site sediments: Pan-American Paleontology, v. 1, no. 1, 20 p.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | 10Be/9Be and 26Al/10Be support a late Miocene burial age for basal Gray Fossil Site sediments |
| Series title | Pan-American Paleontology |
| Volume | 1 |
| Issue | 1 |
| Year Published | 2025 |
| Language | English |
| Publisher | Eagle Hill Institute |
| Contributing office(s) | Florence Bascom Geoscience Center |
| Description | 20 p. |
| Country | United States |
| State | Tennessee |
| County | Washington County |
| Other Geospatial | Gray Fossil Site |