PHYSICAL, MAGNETIC, SEDIMENTOLOGICAL, GEOCHEMICAL, ISOTOPIC AND MICROPALEONTOLOGICAL FEATURES OF RAPIDLY DEPOSITED LAYERS IN THE SAGUENAY FJORD, QUÉBEC: FROM 7200 CAL BP TO
Bibliographic record
Abstract
ABSTRACT: Sedimentological, geochemical, isotopic and micropaleontological properties of surface and sub-surface sediments cored in the Saguenay Fjord and adjacent Baie des Ha!Ha! allowed the identification of several rapidly deposited layers (RDL). The most recent ones in box-cored sediments include layers deposited during the 1996 AD flood, the 1988 AD earthquake and the 1971 AD landslide of St-Jean-Vianney. Short-lived isotope (228Th, 210Pb and 137Cs) measurements suggest discrete mixing, notably on top of these layers, but all were buried rapidly enough to preserve most of their original isotopic signature. Analyses of foraminifers collected before and after the 1996 AD flood indicate that the recolonization of surface sediments by the benthic microfauna was almost immediate, with increased species diversity as compared to pre-flood sediments, suggesting that the 1996 AD flood layer has played a role in isolating the underlying contaminated sediments. A total of 14 RDL likely resulting from high magnitude (>6) earthquakes during the last ∼7200 calibrated years BP were also recognized in a 38 m-long piston core from the inner basin of the Fjord. They include a ∼16-m thick layer associated with the great historical earthquake of 1663 AD. RÉSUMÉ: L’analyse des propriétés sédimentologiques, géochimiques, isotopiques et micropaléontologiques de plusieurs carottes sédimentaires ainsi que de sédiments de surface prélevés dans le fjord du Saguenay et la baie des Ha!Ha! a permis d’identifier plusieurs couches accidentelles. Les couches accidentelles les plus récentes observées dans les carottes-boîtes ont été déposées à la suite de la crue de 1996 AD, du séisme de 1988 AD et du glissement de terrain de St-Jean-Vianney en
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".