Reappraisal of the Cambrian glauconite-bearing Anse Maranda Formation, Quebec Appalachians: from deep-sea turbidites to clastic shelf deposits
Bibliographic record
Abstract
The Cambrian Anse Maranda Formation is a glauconite-bearing clastic succession within the Quebec Reentrant. It is part of the Appalachians Humber Zone, particularly of the shale feldspathic sandstone assemblage, which represents the rift-to-drift deposits of the Laurentian margin. The massive sandstones of the Anse Maranda were originally interpreted as the proximal turbidites of a deep-sea fan. The occurrence of glauconite and the high degree of bioturbation, which give the sandstones a massive aspect, suggest a different depositional environment. Detailed ichnology and lithofacies descriptions indicate that the Anse Maranda predominantly represents shelf sediments deposited in storm-influenced environment and that intense bioturbation destroyed most of the sedimentary structures. The paleo geographic reconstruction suggests that the Anse Maranda was deposited seaward of a headland identified as the Montmorency Promontory, along a narrow shelf with an irregular topography. Some coeval turbidites of similar composition were deposited in the deeper sub-basins. This reconstruction allows for sustained sediment-starved conditions to be maintained for more than 10 Ma and to produce anomalously thick glauconite-bearing succession. The bioturbation has influenced the diagenetic evolution of the Anse Maranda Formation. The laminated sandstones and burrows were cemented by early calcite, while the microporosity of the bioturbated sandstones lasted longer and permitted the formation of a muddy pseudomatrix.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".