Sequence stratigraphy of the Viking Formation in central Alberta
Bibliographic record
Abstract
The late Albian Viking Formation was deposited in a foreland basin depositional setting in the Western Canadian Sedimentary Basin. The Viking Formation is currently defined on the basis of lithostratigraphic and allostratigraphic nomenclature. Both models reside at too broad of a hierarchal scale to facilitate within-field correlations, resulting in an over generalized framework for a significant hydrocarbon producing unit in Alberta. This study proposes a sequence stratigraphic framework for the Viking Formation that utilizes the 4-systems tract nomenclature for the deposits in central Alberta. A high-resolution approach to mapping facies distributions that comprise systems tracts has been undertaken in order to create a regionally consistent model. The result of this work is the identification of four sequences of Viking deposition, with the majority of the work focusing on Sequence 2 due to is stratigraphic and structural complexities. The Viking Formation is mapped at two hierarchal levels that are independent of the scale of study. Low-frequency genetic stratigraphic sequences and high-frequency genetic stratigraphic sequences are both documented in the study area, with the higher-frequency expressions forming the overall stacking patterns of the lower-frequency expressions. By mapping at such a resolution, it was possible to discern two unique stratigraphic architectures preserved in the Viking: i) over-thickened units related to tectonic activity; and ii) coeval deposition of transgressive and regressive units. This thesis discusses the integral role that tectonic activity had on the architecture of the systems tracts deposited during Viking time. Only by recognizing the effect that tectonic activity had on deposition can one accurately map the orientation and distribution of systems tracts in the Viking Formation.
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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 | 0.001 |
| 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".