Storm-Influenced Prodelta Turbidite Complex in the Lower Kenilworth Member at Hatch Mesa, Book Cliffs, Utah, U.S.A.: Implications for Shallow Marine Facies Models
Bibliographic record
Abstract
Abstract Isolated sandstone bodies encased in marine mudstones have proved difficult to explain, especially those that are not easily incorporated into conventional facies models. The Hatch Mesa succession (Campanian, lower Kenilworth Member) is a marine mudstone-encased, turbiditic sandstone body, 6 to 20 m thick, that is exposed along a 7-km-long outcrop belt, approximately 15 km east of Green River, Utah, U.S.A. Various interpretations of depositional environment and regional correlation have been proposed over the past 20 years. A sedimentological analysis of the Hatch Mesa succession suggests deposition as a storm-influenced, prodelta turbidite complex on the shallow inner shelf, between fair-weather and storm wave base. This interpretation is corroborated by the high-resolution outcrop correlation and subsequent paleogeographic reconstruction, which indicates deposition 16 to 21 km basinward of the time equivalent lower-shoreface deposits, in about 20 m water depth. A variety of mechanisms are capable of generating instability in the delta front and triggering the turbid flow of sediments into deeper water, including storm events, river flooding, high rates of sedimentation, or earthquakes. This explains the complex mixture of event beds in the Hatch Mesa succession, which are dominated by wave-modified turbidites. A three-component model, consisting of delta-front, subaqueous channel, and prodelta turbidite deposits, is proposed to explain the depositional environment and setting of the Hatch Mesa succession. All three components are observed in the lower Kenilworth Member to upper Aberdeen Member stratigraphic interval. The results of this study indicate that shallow marine facies models should be revised to include marine mudstone-encased, prodelta turbidite complexes, thus adding one more possibility to the diverse suite of interpretations used to explain the generation and preservation of isolated marine sandstone bodies. These results also shed new light on the stratigraphic position and depositional setting of the Mancos Shale-encased, isolated sandstone bodies of the Prairie Canyon Member in eastern Utah and western Colorado.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 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".