Stratigraphy of the Fluvial-To-Marine Transition Zone Associated With A Forced-Regressive Compound Incised-Valley System In the Turonian Ferron Notom Delta, Utah, U.S.A.
Bibliographic record
Abstract
Abstract This paper examines facies and stratigraphic relationships at the tip-out of a sequence boundary along the fluvial-to-marine transition zone of the Cretaceous Ferron Notom delta, Utah. Correlation of 11 measured sections shows that the sequence boundary underlies amalgamated fluvial deposits in more proximal parts of the valley, whereas the valley fill splits into a pair of fluvial channel facies separated by transgressive shoreface deposits in the transition zone. This indicates at least two episodes of downcutting and valley filling, and suggests a compound valley system. Thick sandy deltaic deposits are interpreted as the falling-stage and lowstand deposits farther downdip, fed by the rivers that cut the valley. Paleohydraulic calculations indicate that the valley-forming trunk channels were on the order of 5.5 m deep, and carried coarse sand with rare pebbles over a slope on the order of 0.0005. Corresponding backwater lengths were on the order of 10 km. Recent models show that channels in the backwater zone should experience greater levels of aggradation, versus rivers landward of the backwater, which may show greater lateral migration or incision, and these predictions are matched by our observations. In addition, tidal backwater effects are predicted to be on the order of a few kilometers. The valley-fill shows increasing aggradation and tidal facies in sections a few kilometers from the mapped shorelines, which suggests a short backwater length. The relatively short backwater also allows the rivers to bring coarser sand and gravel close to the shoreline.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".