Drainage Organization and Sea-Level History of the Early Cretaceous McMurray Formation, Northeastern Alberta, Canada
Bibliographic record
Abstract
The densely penetrated McMurray Formation of northeastern Alberta, Canada records the activity of a continental-scale river and marginal-marine sedimentary system, providing a unique opportunity to: (1) test for an Aptian glacio-eustatic signal within the Western Canadian Foreland Basin, and (2) evaluate a well-preserved drainage system at the basin-scale. Three distinct incised valleys and one deltaic channel system subtending from upward-coarsening deltaic parasequence sets are documented across an area >26,000 km2. At least six high frequency cycles of transgression and regression are apparent within the McMurray Formation stratigraphy. The high frequency nature of these Aptian sequences suggests that the sea-level oscillations recorded in McMurray Formation strata are consistent with a glacio-eustatic driver. By integrating measured bankfull flow depths and catchment area estimates from the stratigraphically distinct channelized systems, details about Aptian drainage organization can be gleaned. Data collected in this study suggest that the McMurray drainage system was fed by both an axial, continental-scale river system and a smaller transversely-sourced drainage network.
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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 | 0.002 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".