Sea-Level Evidence for a Significant Reduction of the Laurentide Ice Sheet in MIS 3, Georgia Bight, Southeastern United States
Bibliographic record
Abstract
Garrison, E.G., 2023. Sea-level evidence for a significant reduction of the Laurentide Ice Sheet in MIS 3, Georgia Bight, southeastern United States. Journal of Coastal Research, 39(5), 836–847. Charlotte (North Carolina), ISSN 0749-0208. Recently, a hypothesis was proposed for a significant reduction of the central region of the Laurentide Ice Sheet (LIS) from ca. 52 to 40 kYBP during marine isotope stage (MIS) 3. Corroborative evidence for this hypothesized reduction exists in the form of ages for higher sea levels in the Georgia Bight of the U.S. continental shelf, which have been dated to early MIS 3 using a variety of methods. These sea-level ages (15) were documented during ongoing continental shelf research conducted over the past two decades in the Georgia Bight and support the idea of a much-reduced LIS in early MIS 3 in synchrony with previously published geological and age data from the Hudson Bay Lowland of central Canada. The agreement between these data sets supports the need for a careful reassessment of late Pleistocene climate variability, ice retreat/advance, and a coupled sea-level response to both. This report reviews present and past research on paleoclimate in MIS 3 in order to place the age data in a broader perspective of sea-level and ice-volume drivers. Glacio-isostatic adjustment is also addressed as an important factor in near- and intermediate-field mantle response along the Atlantic coast of the United States to LIS ice loading during MIS 3.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.007 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".