Ordovician and Silurian strata of northeastern British Columbia: stratigraphic sections and synthesis of biostratigraphy
Bibliographic record
Abstract
Thirty-six stratigraphic sections document the Ordovician and Silurian strata of northeastern British Columbia. The sections were measured through outcropping strata deposited on the MacDonald and Cassiar platforms, in the adjoining Kechika Trough of the Selwyn Basin, the Nasina Basin, and within transitional zones between these regions. Synthesis of published and unpublished data from studies of microfossils and of invertebrate and vertebrate macrofossils constrains the ages of the formations and assists in the interpretation of the stratigraphic history of the region. Several regional unconformities are recognized within the successions. From the platformal rocks and the transitional rocks, hiatuses can be documented during the earliest Caradoc, mid to late Caradoc, late Ashgill to very early Llandovery, mid Llandovery and within the interval Wenlock to Ludlow. Within the basinal rocks, only the Llandovery hiatuses have been recognized.
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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 | 0.006 | 0.010 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 0.001 |
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".