Seismic stratigraphy of the lower St. Lawrence River estuary (Quebec) Quaternary deposits and seismic signature of the underlying geological domains
Bibliographic record
Abstract
The lower St. Lawrence River estuary is a narrow Quaternary basin filled with several stacked sedimentary units. Recently, high-resolution seismic-reflection surveys conducted in the lower St. Lawrence River estuary permitted identification of eight seismic units overlying three lithotectonic domains with different seismic signatures. Units 1 and 2 have highly variable thickness and fill most of two major bedrock depressions that exist in the study area. Unit 3 is present over the entire lower St. Lawrence River estuary basin, partly infilling ponded basins found on the shoulders of the estuary. Units 4 and 5 have a more constant thickness, suggesting that they were deposited in a hemipelagic setting. Units 6, 7, and 8 result from local processes like the sedimentation of submarine fans, mass-wasting deposits, and contourite drifts occurring along the flanks of the Laurentian Channel. The thickness of the Quaternary succession shows a strong correlation with the bedrock topography, indicating that the lower St. Lawrence River estuary was an effective sediment trap.
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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 | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.009 | 0.001 |
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".