ARCHOSAUR FOOTPRINTS – POTENTIAL FOR BIOCHRONOLOGY OF TRIASSIC CONTINENTAL SEQUENCES
Bibliographic record
Abstract
Abstract—Historically, footprint-bearing localities in eastern and western North America and southern Thuringia and northern Bavaria have played pivotal roles in Triassic archosaur footprint research. In a nearly complete sequence of formations and footprint-horizons in the Moenkopi Group (U.S.A.), Newark Supergroup (U.S.A. and Canada), and Buntsandstein, Muschelkalk, and Keuper groups (Olenekian to Norian-Rhaetian) of central Europe, the principal morphs of archosaur footprints are represented by Rotodactylus, Synaptichnium, Isochirotherium, Brachychirotherium, Chirotherium, Sphingopus, Parachirotherium, Atreipus, and Grallator. Additionally, the temporal and, in principal, the evolutionary “root ” is documented by Protochirotherium from the early Olenekian of Hessen. Of utmost significance is the evolutionary succession from Chirotherium to Grallator. Therein, the development of two key features seen in the origin and early evolution of dinosaurs – tridactyl foot-morphology and the bipedal gait – is documented between the Olenekian and Norian. The strati-graphic distribution of these forms and their potential for biochronology yields a biochronological sequence we sketch out as follows: For the Triassic we discriminate six successive biochrons (I-VI). Each biochron is marked by
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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 | 0.003 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 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".