Age constraints on marine-fluvial deposits at Rancho La Palma, Baja California Sur, Mexico
Bibliographic record
Abstract
contienen registro fósil de cetáceos (ballenas barbadas).La datación de circones de una toba recolectada cerca de la base del Cerro El Divisadero arrojó una edad de 206 Pb/ 238 U de 27.95 ± 0.16 Ma.Esto sugiere que las capas marinas y fluviales que afloran en la localidad Rancho La Palma son de edad Rupeliano y no del Mioceno temprano como se reportó anteriormente.Por lo tanto, los depósitos marinos del Cerro El Divisadero pertenecen a la Formación El Cien la cual aflora en San Juan de La Costa y son contemporáneos a la parte media del Miembro San Juan, representando una posible facies marginal de esta unidad.Nuestros resultados restringen la edad de los fósiles de ballenas barbadas recolectados en la sección Cerro El Divisadero, proporcionando pistas sobre la evolución de los cetáceos del Oligoceno en el Pacífico Norte.
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".