Biostratigraphical and ecostratigraphical significance of Tremadoc (Ordovician) graptolite faunas from the Misty Creek Embayment and Selwyn Basin in Yukon and Northwest Territories
Bibliographic record
Abstract
Graptolite zones of early and late Tremadoc ages are described from the Elmer Creek Formation in the Selwyn Basin and from the Duo Lake Formation in the Misty Creek Embayment. In ascending order, these are: Staurograptus dichotomus, Anisograptus matanensis, Adelograptus cf. A. tenellus and Aorograptus victoriae Biozones. The uppermost zone embraces the Adelograptus antiquus Biozone, Kiaerograptus? pritchardi Biozone, and the Paradelograptus kinnegraptoides Biozone in the Richardson Trough. Twenty five species are recorded and fourteen species are described, including the first record of the Rhabdinopora fauna in the early Tremadoc of northwest Canada and Kiaerograptus magnus Williams and Stevens and Paratemnograptus isolatus Williams and Stevens in the late Tremadoc. When modifications to Cooper's (1999) ecostratigraphic model are made based on data from Yukon and Northwest Territories, the upper slope biotope and lower slope ocean-floor biotope become so similar that there is little basis for recognising both biotopes.
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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 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 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".