Age and paleoenvironmental significance of Late Wisconsinan dune fields in the Mount Watt and Fontas River map areas, northern Alberta and British Columbia
Bibliographic record
Abstract
Seven optical ages from two dune fields in northern Alberta and British Columbia record Late Wisconsinan dune activity between about 13.9 and 10.3 ka. Sand dunes in the Fontas River area of British Columbia (NTS 94-I) formed between 13.9 and 11.7 ka. Initial winds blew from the northwest, funnelled between the Laurentide and Cordilleran ice sheets. These were replaced by winds from the west, likely associated with the Pacific air mass. Dunes in the High Level area of Alberta (Mount Watt, NTS 84 K) first formed at about 13.4 ka under transporting winds from the northeast and southeast, probably originating katabatically from the Laurentide Ice Sheet. Subsequent winds between about 11.7 and 11.0 ka were from the southeast, originating from glacial anticyclonic winds generated by a stationary high-pressure centre over the Laurentide Ice Sheet. These dunes were further modified by winds from the east. The High Level dunes stabilized at about 10.3 ka with the onset of boreal forest vegetation cover and reduced wind strength.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 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".