A multi-disciplinary study of Port Eliza cave sediments and their implications for human coastal migration
Bibliographic record
Abstract
A multi-disciplinary study at Port Eliza cave on Vancouver Island has refined the timing and character of late Wisconsinan environments and has significant implications for the Human Coastal Migration Hypothesis. Loss-on-ignition, paleomagnetic and sedimentological data show that there was continuous sedimentation through the last glacial maximum, implying a warmbased Cordilleran Ice Sheet. Radiocarbon dating supported by paleomagnetic data and U/Th ages constrain the time of maximum glaciation to between ca. 16 and 12.5 ka BP. Terrestrial floral and faunal data indicate a pre-Last Glacial Maximum, cold, dry, steppe environment with rare trees but a diverse fauna. Marine fossils represent a rich, dominantly nearshore fauna and suggest the sea was close to the cave. These data indicate that ice-free conditions lasted until at least 16 ka BP, and suggest that prior to the late Wisconsinan glacial maximum, humans could have survived on a mixed marine-terrestrial diet in the Port Eliza area.
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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 | 0.003 | 0.004 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".