Geological setting of Lake Banook - sedimentation and habitat in an urban lake
Bibliographic record
Abstract
Sequence B is the second of three unconformity-bounded, post-Hudsonian Proterozoic sequences in northern Canada. Its deposition postdated the Grenvillian orogeny (ca. 1200-1000 Ma) and ended prior to the break-up of Rodinia (ca. 780-720 Ma). Sequence B crops out: in the Mackenzie Mountains, Wernecke Mountains, and Ogilvie Mountains of the northern Canadian Cordillera; south of Amundsen Gulf on the northern mainland; and on Victoria Island and Banks Island. Exposures in the eastern Northwest Territories and western Nunavut are part of the Amundsen Basin. Sequence B is present also in the subsurface in all these regions, as well as beneath the northern interior plains. Lithostratigraphic nomenclature of Sequence B is well developed in the Amundsen basin (Shaler Supergroup), partly formalized in the Mackenzie Mountains (Mackenzie Mountains supergroup), and largely informal elsewhere. Formations encompass a wide variety of siliciclastic, carbonate, and evaporite lithofacies. Deposition of Sequence B is interpreted to have taken place in an epicratonic basin (epeiric sea) that was episodically restricted during its evolution. Net depositional thickness of Sequence B was roughly twice as thick in the Mackenzie Mountains as in the Amundsen Basin, probably reflecting greater syndepositional crustal extension in the former area. Recognition of five, regional-scale subsequences with Sequence B permits correlation between the northern Cordillera and the Amundsen Basin but the subsequences cannot be recognized at present beneath the interior plains. Correlation charts and isopach maps presented in this report aid in reconstructing the tectonostratigraphic evolution of Sequence B. Sequence B has known potential for sediment-hosted base-metal deposits and red-bed-type stratiform Cu-Ag-Co deposits. In the Amundsen Basin, carving stone is obtained from Sequence B and some gypsum deposits may be of industrial value. Hydrocarbon potential is low to absent.
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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 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".