Upper Triassic Mid-Latitude Cool-Water Carbonate Deposit: Sedimentology and Stratigraphy of the Gore Point Member, Roche Point Formation, Arctic Islands, Canada
Bibliographic record
Abstract
The Gore Point Member is a mixed carbonate-siliciclastic unit deposited in the Sverdup Basin (Canadian Arctic Islands) during the Carnian (Late Triassic). While mixed carbonate-siliciclastic deposits are not rare within the global rock record, the Gore Point Member is unique in that it is the only unit with meaningful amounts of carbonate material within the Mesozoic succession of the Sverdrup Basin. However, as detailed sedimentological or sequence stratigraphic studies of the Gore Point Member have been yet to be undertaken, the existence of this anomalous unit remains unexplained. This study applies thin section microscopy and microfacies analysis of 285 samples from 12 sites across western Ellesmere Island, and lithofacies analysis of one core on Mackenzie King Island, to interpret the depositional setting of the Gore Point Member. These observations reveal fine-grained quartz-dominated siliciclastics and heterozoan carbonate material deposited in a ramp setting in an arid, cool-temperate environment. Integration of sedimentological trends with subsurface wireline well logs throughout the Sverdrup Basin reveals deposition across three fourth-order transgressive-regressive sequences. It is postulated that the arid climate along with tectonic quiescence reduced siliciclastic input, providing a window of opportunity for heterozoan biota to propagate. The Gore Point Member is significant as it is one of very few examples globally of a ramp-type carbonate deposit from the Triassic, and the highest latitude and most cool-water example recognized thus far.
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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 | 0.002 |
| Science and technology studies | 0.002 | 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) | 0.001 | 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".