Emplacement and denudation history of the LewisEldorado-Hoadley Thrust Slab in the northern
Bibliographic record
Abstract
ABSTRACT. The northern Montana Cordilleran mountain chain provides unusual opportunities to evaluate long-term orogenic processes in a foreland thrust belt. The thick Lewis-Eldorado-Hoadley thrust slab and an imbricated thrust wedge in its footwall dominate the structure of the region. The slab is composed of the displaced Mesoproterozoic Belt-Purcell depositional basin and overlying Phanerozoic strata, tectonically inverted into the broad, deeply dissected Purcell anticlinorium. The geometric simplicity and stratigraphic integrity of the structurally strong, thick slab constrain crustal-scale cross sections. Horizontal displacement of the slab increases from 40 km in central western Montana to 140 km at the United States-Canada border. Thermochronometers from the exhumed thrust slab and its footwall coupled with erosional products in the neighboring foreland basin measure regional denudation during Maastrichtian to middle Paleocene tectonic convergence. During the 15 my period of slab emplacement (74-59 Ma), regional denudation appears to have been minimal as the footwall subsided isostatically beneath the advancing tectonic load; erosion did not breach the Paleozoic cover of the slab. Similarities in burial and
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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) | 0.001 | 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".