Contemporary Subsidence and Ground Movement, Southwestern Ontario: Possible Bedrock Controls
Bibliographic record
Abstract
Ground movement, principally subsidence with limited strike-slip displacement, occurs discontinuously along an 8 km-long, north-south zone which is subparallel to the St. Clair River and extends from Mooretown to Corunna, Ontario. The southern-most area of subsidence lies beneath the river, 25 m from the Canadian shore. The longest continuous interval of subsidence is ^ 75 m east of the river and the northern limit is located about 250 to 300 m east of the river. Subsidence has been both abrupt and gradual, occurring overnight and over a two-year period. In the south and central areas the west side (the side closer to the river) has dropped 20 to 40 cm. However, in the north, the east side has subsided. The foundation of one home has been displaced 1 and 5 cm, in a right-lateral sense, along two discrete surfaces. The ground movements do not resemble surface slumping. Bedrock movement resulting from either dissolution of limestone or salt, displacements along Grenville basement structures, or a combination of the two may explain the phenomenon. The deformation observed, both in the production of scarps and damage to civil structures, may have neotectonic implications.
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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 | 0.001 |
| 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 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".