Structure of the Central Atlantic Conjugate Passive Margins and their Associated Sedimentary Basins
Bibliographic record
Abstract
Summary Deep seismic data represent a key to understand the geometry and mechanism of continental rifting. The Central Atlantic conjugate passive continental margins pair is one of the oldest on earth, formed during the Upper Triassic–Lower Liassic. We present wide-angle and reflection seismic data from two study regions along this margin. Along the NW-African the thickness of unthinned continental crust decreases from 36 km in the North to about 27 km in the South. Crustal thinning takes place over a region of 150 km in the north and only 70 km in the south. The ocean-continent transition zone shows a variable width between 40 and 70 km and is characterised by seismic velocities in between those of typical oceanic and thinned continental crust. The neighbouring oceanic crust is characterised by a thickness of 7–8 km along the complete margin. Comparison to the conjugate margin off Nova Scotia shows comparable continental crustal structures, however 2–3 km thinner oceanic crust on the American side than on the African margin. Comparison to the Gulf of Lions – Sardinian margin pair shows symmetric structures comparable to those of the NE-Canadian – NW - African margin pair.
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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 | 0.000 | 0.000 |
| 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 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".