Paleoecological study of the earliest Cambrian biological activity evidenced by the diversification of ichnofossils
Bibliographic record
Abstract
In order to better understand the diversification of the animal activities in the earliest Cambrian than studying only body fossils, ichnofossils were comparatively studied in three different localities (Newfoundland, Canada, Yunnan, China and Gobi-Altai, Mongolia).Special attention was paid for the following topics; 1) To understand the developmental mode of the animal behaviors, the diversification patterns of ichnofossils were studied, 2) To know the adaptation processes to different environments, changes of the ichnofossil assemblages in different sedimentary facies were surveyed, 3) To reveal the body size changes of trace maker animals, size distributions of the tubeshaped ichnofossil Planolites were investigated, 4) To clarify the buildup processes of animal activities, densities of ichnofossils covering the bedding planes were measured.The diversification patterns of the ichnofossils in the earliest Cambrian Chapel Island Formation, Newfoundland show that major diversification of the ichnofossils occurred twice; firstly at the almost basal part of the Pc-C boundary, secondly around the boundary of the Treptichnus pedum and Rusophycus avalonensis zones.The ichnofossil assemblages are relatively common to different depositional facies, suggesting that there was no conspicuous specialization of these assemblages to particular facies.This observation indicates that animal behaviors developed in a wider environmental spectrum 6. Conclusions
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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 | 0.000 |
| 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 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".