ARCHAEAN SEDIMENTATION: ALLUVIAL FAN AND TURBIDITE DEPOSITS, LITTLE VERMILION LAKE, NORTHWESTERN ONTARIO
Bibliographic record
Abstract
A sequence of sedimentary rocks within a greenstone belt at Little Vermilion Lake, near Sioux Lookout, in northwestern Ontario, has been mapped in detail, and 5 facies have been established. The lowest 1,700 m of the sedimentary succession rests unconformably on a thick sequence of volcanics, and is composed of a conglomerate facies and an arkose facies. The conglomerates occur in beds up to 20 m in thickness, are laterally impersistent, and comprise pebbles, cobbles and boulders (up to 1.5 m in diameter) of basic to acidic volcanic rocks and granodiorite, with an interstitial matrix of arkose. The conglomerates are commonly massive, and exhibit no cross-stratification or graded beds, but some are imbricated. The arkoses commonly occur as interbeds less than 1 m thick between massive conglomerates, or occur as thick sequences which are commonly massive, but which exhibit some trough cross-bedding, parallel lamination and graded bedding. The arkoses and conglomerates are succeeded by 100 m of felsic tuff, 60 m of greywacke and argillite, 270 m of basic tuff, and a 600 m thick section of graded greywackes and argillites, with individual beds commonly less than 30 cm thick. The arkoses and conglomerates are interpreted as alluvial fan deposits, whilst the greywackes and argillites are interpreted as turbidites. The tuffs mark explosive volcanic activity which accompanied the deepening of the basin- of deposition. The petrographic characteristics of the sediments indicates that the provenance area was composed of basic to acidic volcanic rocks, together with a large e.xtent of granodiorite. The granodiorite may have intruded the volcanics, prior to the deposition of the sediments.
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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 | 0.003 |
| Science and technology studies | 0.003 | 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".