Formal ratification of the GSSP for the base of the Calabrian Stage (second stage of the Pleistocene Series, Quaternary System)
Bibliographic record
Abstract
by the International Commission on Stratigraphy (ICS) that the Global Boundary Stratotype Section and Point (GSSP) at Vrica, Calabria, Italy (Fig. The Vrica GSSP had previously defined the base of the Pleistocene and Quaternary before these datum points were lowered in 2009 to the Monte San Nicola GSSP in Sicily, Italy, which also defines the base of the Gelasian Stage (Gibbard and Head, 2010; Gibbard et al., 2010). The proposal had been submitted to the ICS by the Subcommission on Quaternary Stratigraphy (Table Ratification by the IUGS makes the Calabrian the second stage of the Pleistocene Series, immediately following the Gelasian as the lowest stage (Fig. It is emphasised that the ratified proposal does not define a new GSSP, but merely names the stage that the GSSP now defines.
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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 | 0.006 | 0.008 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.003 | 0.003 |
| Scholarly communication | 0.004 | 0.002 |
| Open science | 0.002 | 0.003 |
| Research integrity | 0.004 | 0.007 |
| Insufficient payload (model declined to judge) | 0.009 | 0.002 |
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".