Lithofacies in the type section of the mid-Neoproterozoic Ram Head Formation, Mackenzie Mountains, Northwest Territories
Bibliographic record
Abstract
The mid-Neoproterozoic Ram Head Formation is the uppermost formation of the Little Dal Group and Mackenzie Mountains Supergroup and records epicratonic sedimentation in northeastern Laurentia immediately preceding the dispersal of supercontinent Rodinia. The Ram Head Formation can be broadly divided into two members: a lower and an upper member. The lower member comprises abundant metre-scale shallowing upwards cycles composed of below wave-base molar-tooth dolomudstone, mechanically laminated dolomudstone and very rare and thin siltstone beds; and shallower water ooid-intraclast grainstones and stromatolites. The upper member begins with a pisolitic unit - interpreted to be a caliche representing a significant period of exposure - and a deepening upwards cycle before the resumption of shallowing-upwards cycles. The upper member contains no molar-tooth dolomudstone, and has significantly more and thicker siltstone units as well as terrigenous mudstone. A number of putative sedimentological evidences for synsedimentary tectonism are present throughout the formation and include: a sudden deepening-upwards cycle at the base of the upper member, locally abundant debrites in the lower member, common soft-sediment deformation and local brittle deformation, and possible toppled stromatolites at the base of the Ram Head Formation. No synsedimentary faults have been observed.
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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 | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".