Unusually fracture-free seafloor in the southern North Atlantic between Newfoundland and Iberia explained through compounding tectonic inheritance since the Paleoproterozoic
Bibliographic record
Abstract
Abstract The seafloor between Newfoundland (eastern Canada) and Iberia (southwestern Europe) is unusually devoid of fracture zones compared to other parts of the Atlantic Ocean. Given that oceanic fracture zones commonly spatially correlate with inherited lithospheric weaknesses onshore, their absence may be suggestive of margins with stronger, broader, and more homogeneous inherited lithospheric structures. Herein, the smooth fracture-free seafloor is attributed to the long-lived influence of the massive St. Lawrence promontory, which (1) formed during Paleozoic Iapetan rifting, (2) subsequently controlled the spatial and temporal evolution of Appalachian orogenesis, and (3) ultimately predetermined the geometry of the Grand Banks continental shelf and the location of the Newfoundland-Azores fracture zone during Atlantic rifting and seafloor spreading. Further still, based on the spatial distribution of the adjacent Precambrian cratons and orogenic belts within ancestral Laurentia, the formation of the St. Lawrence promontory itself is attributed herein to inheritance from earlier episodes of Paleoproterozoic orogenesis during the building of Laurentia and during the amalgamation of the Rodinian supercontinent, suggesting that the influence of lithospheric inheritance on subsequent tectonism may persist and be detectable for almost two billion years and through multiple Wilson cycles.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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 | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".