Glacial-geological record on southern Bafin Island reflecting late glacial ice-sheet dynamics in the eastern Hudson Strait region
Bibliographic record
Abstract
Field observations, sediment analyses, and radiocarbon dating completed over the last decade have led to new ice-sheet reconstructions for southern Baffin Island and eastern Hudson Strait. Past ice-flow patterns are apparent from sediment provenance indicators and striated bedrock surfaces. The timing of events is constrained by over 150 14C determinations on molluscs from ice-contact, deglacial, and postglacial deposits. Together, the data indicate that glacier ice from the Labrador Dome of the Laurentide Ice Sheet pulsed northward across Hudson Strait at least twice during the waning stages of the late Wisconsin glaciation. Evidence and reconstructed ice dynamics are summarized here for the Gold Cove advance (ca. 9900-9600 14C years BP) and the Noble Inlet advance (ca. 8900-8400 14C years BP). Two stratigraphic sections - from the York delta and Noble Inlet - best constrain the origin, extent, and timing of the Noble Inlet advance, and are described in detail. The evidence for northward to northeastward flow on eastern Meta Incognita Peninsula contrasts with the glacial-terrestrial record farther west (near Lake Harbour), where striations and provenance indicators document southward flow into Hudson Strait prior to coastal deglaciation at about 8200 14C years BP. In sum, the available data attest to spatially complex, abrupt ice-sheet dynamics.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".