Sedimentary architecture of a deeply karsted Precambrian - Cambrian unconformity, Victoria Island, Northwest Territories
Bibliographic record
Abstract
A deeply karsted unconformity separates Proterozoic carbonate rocks of the Wynniatt Formation from overlying Cambrian sandstone near the head of Minto Inlet on Victoria Island, Arctic Canada. Sandstone-filled paleocaverns, hundreds of metres wide and tens of metres high, are present approximately 10 to 15 m stratigraphically below the nominal stratigraphic contact between Proterozoic and Cambrian rocks; the position of the paleocaves relative to the main unconformity surface suggests development along a paleointerface possibly associated with the water table. Gryke networks and karstic towers are present in the Wynniatt Formation at the unconformity. Crossbedded sandstone that overlies the unconformity contains unusual, vertical columnar sandstone structures, decimetres to metres in diameter, which cut sharply across bedding and contain weak concentric layering. These pillar-like structures are attributed to water escape through submarine springs, where groundwater flowing through the karst network emerged onto the Cambrian seafloor. The pillars are most densely clustered in the most northern exposure of the sandstone, and diminish in abundance southward, suggesting that the coastline and the source of hydraulic head were to the north of the study 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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.003 |
| Science and technology studies | 0.001 | 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) | 0.002 | 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".