Ediacaran multicellular biota from Krol Group, Lesser Himalaya and its stratigraphic significance-a review
Bibliographic record
Abstract
Ediacaran multicellular biota, viz. medusoids - Kimberella cf. quadrata, Beltanella cf. gilesi, Cyclomedusa davidi, Conomedusites lobatus, Tirasiana sp., Medusinites asteroides, Sekwia cf. excentrica, Irridinitus sp. and Beltanelliformis cf. brunsae; frondoids - Charniodiscus cf. arboreus, Pteridinium cf. simplex and Zolotytsia biserialis; annelid – Dickinsonia sp.; ichnofossils - Bilinichnus sp. and metaphytic algae- cf. Proterotaenia montana, has been recorded from the Kauriyala Formation (Upper Krol) of the Krol Group, Lesser Himalaya India. The underlying Jarashi Formation (Middle Krol) has yielded frondoid forms - Pteridinium carolinaense and Charniodiscus cf. arboreus and trace fossil - Harlaniella sp. whereas the Mahi Formation (Lower Krol) has yielded medusoid - Nimbia cf. occlusa. This biota is generally cosmopolitan in nature except Dickinsonia which is restricted to Protogondwana. The Ediacaran biota is preserved at the interface of arenite / siltstone and shale which show ripple marks, rhythmic and lenticular bedding at places suggestive of tidal flat environment. The present biota is comparable with Ediacaran multicellular biota of Ediacaran (Terminal Neoproterozoic) Period known from Australia, Canada and Russia. The fossiliferous horizons are characterised by dC13 values that vary from +1% to +6% PDB. Similar isotopic signatures have also been described from other Ediacaran fossil bearing horizons from northwestern Canada, Namibia, Australia, China and north Siberia.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.004 | 0.004 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".