Bridging the gap between Quebec and Newfoundland: new insights on the protracted and diachronic history of the Anticosti foreland basin
Bibliographic record
Abstract
The offshore part of the Anticosti foreland basin between Gaspé Peninsula (Quebec) and western Newfoundland has been investigated for its petroleum potential, mainly in the 1980s, but its geometry and evolution remain poorly documented. In this study, short-wavelength magnetic markers associated with intra-sedimentary magnetic susceptibility contrasts are interpreted in conjunction with high-resolution seismic data to map the distribution of rock units. Magnetic markers associated with igneous dykes are distinguished from those associated with sedimentary units by their higher amplitude and geometry. Conjunct interpretation of magnetic and seismic datasets provides new insight on the geometry of the Anticosti Basin and indicates that (i) a relatively thick (∼2 km) post-Llandovery (post-Jupiter Formation) sedimentary succession occurs in the core of two regional synclines where youngest preserved sediments are interpreted as correlative with the Upper Gaspé Sandstone Group–Red Island Road Formation (Emsian–Eifelian); (ii) post-Eifelian (Acadian) deformation consists of a series of folds, 2–10 km in wavelength in the Honguedo Strait, north of the Gaspé Peninsula, and to a single greater wavelength fold in the Strait of Belle Isle; (iii) newly recognized northwest-striking faults that parallel the eastern Gaspé Peninsula shoreline exhibit significant syn- to post-Middle Mississippian movements; (iv) the southern boundary of the Anticosti Basin corresponds either to the unconformity at the base of the Carboniferous–Permian Magdalen Basin or to previously poorly documented east southeast to northeast-striking faults; (v) a series of dykes trend from N90° near Gaspé Peninsula to N170° between Anticosti and Newfoundland islands. These new findings are integrated in an evolution model that enhances the stratigraphic and tectonic along-strike variability of the Anticosti foreland basin.
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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 | 0.002 | 0.003 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| 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".