Structure and stratigraphy in the Pennsylvanian tectonic zone of southern New Brunswick, Canada: the ‘Maritime coastal disturbance’ revisited
Bibliographic record
Abstract
Abstract Identified as the ‘Variscan Front’ 40 years ago, the Pennsylvanian tectonic zone of southern New Brunswick has presented structural and stratigraphic challenges for the last century. In 1986, R. Damian Nance presented an integrated tectonostratigraphic analysis which suggested that the zone represented a transpressive flower structure controlling both deposition of Pennsylvanian sedimentary formations and their subsequent deformation, a consequence of Meguma terrane docking and subsequent adjustment. The strength of this model is demonstrated through the integration of recent field studies and more recent geochronology, which refines the details and expands the scale of the flower structures. Current understanding suggests that three large transpressive structures developed diachronously, and the southern tectonic zone is linked with strike-slip faults to the north (especially the Kennebecasis Fault) via the Spruce Lake Shear Zone. The early history of this zone coincides with a change from deposition of locally sourced continental red beds (lower Pennsylvanian or youngest Mississippian Balls Lake Formation) to more distally sourced fluvial deposits (lower Pennsylvanian Lancaster and Tynemouth Creek formations). Rather than being an isolated segment of a late Pennsylvanian ‘Variscan front’, this tectonic zone can be integrated into the overall strike-slip regime that dominated the Carboniferous evolution of this orogen and the successor basins.
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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 | 0.003 | 0.006 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.002 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".