Controls on glacial divide migration in Southern Canadian Rocky Mountain fold and thrust belt
Bibliographic record
Abstract
The present-day landscape of Southern Canadian Rocky Mountains is a product of the interaction among tectonics, lithologic resistance, and surface processes including erosion by rivers and glaciers. Rivers have adjusted to the orogeny-associated structures, regional tectonic uplift and growing terrain slope, and post-orogenic, extensive glaciation by modifying their channel profile and planform geometry. Understanding the relationship between fluvial and glacial erosion is crucial, as not only does it reflect the landscape’s sensitivity to the climate change, but also because it can indicate whether glacier-driven stream piracy (and basin reorganization) can cause significant downstream discharge alterations. The mechanisms of glacial headwall erosion, drainage divide migration, and resulting stream capture, still form a considerable research gap in landscape evolution studies. The Canadian Rockies provide an excellent opportunity for understanding the progression of subglacial channel network geometry and related basin reorganization. This study aims to evaluate glacial headwall erosion processes in glaciated headwaters through progressive divide lowering, lateral migration, and stream capture. We remotely analyze topographic features, corroborating them in the field. We completed the morphometric investigation using the MATLAB based TopoToolbox, Topographic Analysis Kit, and a customized DivideMigration function. We observe two unique signatures of glacial divide migration in the Canadian Rockies: (1) breached drainage divides that suggest lateral erosion by glaciated headwaters directed along weak lithologies and (2) the presence of low relief, high elevation divides without headwall preservation, possibly indicating periods of paleo-drainage capture during glaciation. Our preliminary results have implications for the role of glacial erosion in reshaping the landscape with respect to the structure, lithology, and climate.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| 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) | 0.002 | 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".