Graptolite Biostratigraphy of the Mungok Formation (Early Ordovician) in the Hwabyung Area, Yeongwol, Korea
Bibliographic record
Abstract
Five species of graptolites belonging to four genera were described from the upper part of the Mungok Formation in the Hwabyung area of Yeongwol, Korea. They are Dendrograptus sp., Callograptus curvithecalis Mu 1955, Adeiograptus tenellus Linnarsson, 1871, Adelograptus sp., and Psigraptus jacksoni Rickards and Stait, 1984. Most of them are reported for the second time in Korea, and the occurrence of Psigraptus is the sixth time ever in the world, following the Yukon Territory of Canada, the Vctoria and Tasmania areas of Australia, and the Jilin and Hebei areas of China. Based on the graptolites, three biozones were recognized from the upper part of the Mungok Formation in the Hwabyung area: the Adelograptus Zone, the Callograptus-Dend개graptus Zone, and the Psigraptus Zone, in ascending order. These graptolite zones are correlated with the La 1.5 Zone (Psigraptus and Clonograptus Zone or Assemblage 3) of Vctoria, Australia, the Psigraptus Zone of the Road River Formation in Yukon, Canada, and the Psigraptus Zone of the Yehli Formation of Hunjiang, Jilin, nonh China. Therefore, according to the graptolites and their biozones, the age of the upper part of the Mungok Formation is assigned to be early Late Tremadoc.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".