Abstract: Sedimentology and paleobiological importance of the Campbellton Formation, New Brunswick
Bibliographic record
Abstract
The Emsian Campbellton Formation of New Brunswick has been widely studied for the exceptional fossil record of early plants, arthropods, and fishes. Strata containing both terrestrial and aquatic organisms are rarely observed elevating the significance of this site for research regarding ancient palaeoecology. However, current research lacks the necessary detailed sedimentary sequence that would facilitate paleobiological or paleoecological assessments. In this study an integrated approach will be used in which the sedimentary record described herein is supplemented by the established fossil record to infer paleoenvironmental conditions at the time of deposition. 312 m of section exposed from an estimated formation thickness of ~1300 m was measured and described. Outcrops were situated along the southern bank of the Restigouche River and Chaleur Bay in two separated belts. The western belt contains the basal contact with the underlying Val d’Amour Formation rhyolites as well as all aquatic fossils including chondrichthyans, acanthodians, placoderms, ostracods and eurypterids. Several of the vertebrate fossils were found in the mudstone matrix of a rhyolite breccia, with rhyolite clasts derived from the Val d’Amour Formation. Further aquatic fossils in this belt were discovered in cross-stratified sandstone and shale. The eastern belt shows a dramatic overall coarsening upwards sequence from fine-grained deposition in quiescent environments allowing horizons of stromatolite formation, to a range of fluvial regimes, to very coarse alluvial boulder-cobble conglomerates with paleoflow from the north. Dips also increase
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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 | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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 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".