The evolution of Keele Arch, a multiphase feature of the northern mainland, Northwest Territories
Bibliographic record
Abstract
Keele Arch is a zone of structural, erosional, and depositional features along a corridor between the eastern Colville hills and the Franklin Mountains, Northwest Territories. It has a long history of basin-to-arch reversals. Paleomaps and sections illustrate the arch's evolution through six phases: 1) uplift as a very early Cambrian pre-rift high, 2) subsidence into a graben chain during Cambrian to mid-Ordovician time, 3) uplift of its southern half into a pre-Devonian arch extending southward from the present day northern Franklin Mountains to beyond Johnson River, 4) renewed uplift into a pre-Cretaceous arch running from north of Lac des Bois to Johnson River, 5) mid-Cretaceous reactivation of the pre-Cretaceous and southern pre-Devonian arches, 6) subsidence of its central zone into Brackett Basin and inversion of the Cambrian McConnell graben into the McConnell Range during late-Campanian to Paleocene time. Keele Arch consists of four parts: 1) a northern segment extending northeastward from the Northern Franklin Mountains toward Lac des Bois; 2) the north half of Keele Tectonic Zone under the northern Franklin Mountains; 3) between Brackett Lake and Keele River; 4) a fourth and poorly understood segment under Mackenzie Valley, south of Keele River, where the arch axes appear to fall into two sets: an eastern set of Cambrian to mid-Ordovician sag axes and latest Silurian to Eocene uplifts, and a western set of Cambrian to mid-Cretaceous arch axes that tracks across a block of Proterozoic rock directly overlain by Devonian strata. The arch's economic significance is not fully understood.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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".