Deep-Marine Pseudo Dune Cross-Stratification—Similar, But Completely Different
Bibliographic record
Abstract
Abstract: High-angle cross-stratification related to the downflow migration of subaqueous dunes is common in the continental sedimentary record but is puzzlingly uncommon in deep-marine strata. In deep-marine rocks of the Windermere turbidite system, however, several centimeters to decimeters-thick, high-angle cross-stratified sets that resemble dune cross-stratification are commonly observed, but in an upflow direction characteristically transition abruptly at the brinkpoint into planar stratification. Typically, the transition coincides with an abrupt deepening of a basal scour, and into and onto which a progressively lengthening and commonly thickening wedge of high-angle cross-strata downlap. Moreover, the several-meters to several-decameters-long sets are longitudinally discontinuous, even though they typically sharply overlie an areally expansive sandy substrate and evidence of scour by a younger event is generally absent. Instead these strata are interpreted to represent the flat-topped, steep-fronted, prograding fills of isolated scours, and therefore in spite of resembling the cross-stratification formed by the migration of subaqueous dunes, dunes were not involved in deposition of these strata.
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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 | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".