Sequencing, Scaling and Correlation of Stratigraphic Events
Bibliographic record
Abstract
The RASC computer program for ranking and scaling of stratigraphie events was developed between 1978 and 1985. It has been available unaltered as version 12 since 1985, and new methodology justified an update commenced in 1994. This paper discusses revised method of scaling stratigraphie events. New results are compared with previous results for a mid-Cretaceous optimum sequence of 87 dinoflagellate, foraminiferal and a log event in 29 wells, northern North Sea and offshore mid-Norway. The improved method (RASC, version 15) yields better definition of clusters of biostratigraphic events, and more sharply defined intereluster distances (breaks) coinciding with hiatuses that can be interpreted in terms of northwestern European sequence stratigraphy. In general, the new scaling procedure is more robust to diminished frequencies of co-occurrences of fossil events in the same wells.
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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 | 0.001 | 0.006 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 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) | 0.006 | 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".