Tidal-Fluvial and Wave-Dominated Estuarine Valley Fills: Ichnological- Sedimentological-Palynological Comparison of Central Basin and Lateral Accretion Deposits, Lower Cretaceous Glauconite and Viking Formations, Central Alberta
Bibliographic record
Abstract
Introduction and Data Sources This study documents palynomorphs recovered from estuarine valley fills, and evaluates their paleoecological implications with respect to ichnologic and sedimentologic aspects of the depositional facies. Estuarine valley fills are major hydrocarbon producers in the Lower Albian Glauconite Formation and the Upper Albian Viking Formation of central and southern Alberta. Reservoir units are mainly spatially restricted channelized sandstones, channel morphologies are tidal-fluvial estuarine fills for the Glauconite Formation, versus wave-dominated estuarine fills for the Viking Formation. Channel fills within tidal-fluvial systems typically contain lateral accretion deposits comprising inclined heterolithic stratification (IHS). By contrast, IHS is absent from the Viking Formation estuarine channel fills. Both valley systems possess facies recording the central basin, which retain evidence of the relative interplay of marine (waves and/or tides) and fluvial processes. The accurate characterization of the central basin may improve predictions of adjacent sandstone bodies and paleoecologic interpretations. Planktonic dinoflagellates produced cysts diversity and abundance generally decreases in salinity-stressed coastal environments compared to offshore-fully marine environments, although particular species may be abundant (e.g., Leckie et al., 1990). Dinocyst assemblages and trace-fossil suites can serve as independent indicators of salinity conditions and other ecologic factors operating in the depositional environment. Facies descriptions and interpretations of the Viking Formation central-basin facies have been derived from MacEachern and Pemberton (1994). Complementary palynological data was provided in MacEachern et al. (1999). Descriptions of the Glauconite Formation central basin and lateral accretion facies are based on core photos and descriptions in Leroux et al. (1999). Palynological assemblages from these facies are summarized from unpublished consulting reports compiled by Dr. Graham Dolby. All reported palynological assemblages were determined by 200 specimen counts, and through scans of the entire slide for additional taxa. The taxonomic classification used follows Fensome et al. (2009).
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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 | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 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".