Mineralogy, geochemistry, grain size and pebble componentry of the Newmarket Till and the Dummer Moraines in the Kaladar-Tweed-Belleville area of eastern Ontario
Bibliographic record
Abstract
Downflow glacial dispersal was investigated across the southern Ontario Canadian Shield-Paleozoic boundary along two detailed transects with surficial sediment sampling, sub-parallel to the dominant NNE-SSW transport direction. The transects started on the Shield, transited the Shield-Paleozoic boundary and extended into the Paleozoic basin, with the target sediments being the Newmarket Till and the Dummer Moraines. Geochemistry and mineralogy analyses of the clay + silt (<0.063 mm) size fraction, and pebble componentry provide the data required to elucidate the provenance of these two glaciogenic sediment formations, and their potential relationship to each other. Till thickness increases from <2 m (on the Shield) to >=10 m (on the Paleozoic basin) within 1 km south of the Shield-Paleozoic boundary. The Newmarket Till and Dummer Moraines both consist of carbonate-rich glaciogenic sediments, resultant from source material input dominated by limestone, shaly limestone and dolostone of the Paleozoic Gull River, Bobcaygeon and Verulam formations. Based on data from this study (matrix mineralogy and geochemistry, pebble componentry), we conclude that the Dummer Moraines are best termed as pebble-, cobble-, boulder-rich facies equivalents of the Newmarket Till. This study highlights the rapid transition in till matrix and clast content when transitioning from hard Canadian Shield lithologies to Paleozoic carbonate rocks and complexities along different glacial flowlines.
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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 | 0.002 | 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".