Northward subglacial drainage during the Mackinaw Interstade in the Cayuga basin, central New York, USA
Bibliographic record
Abstract
The history of deglaciation in the Finger Lakes region since the Valley Heads readvance is questioned by recent research in the Cayuga basin, which concludes that, instead of forming a series of proglacial lakes, drainage during the Mackinaw Interstade was into the Laurentide ice sheet. First suspected in the Dryden–Virgil Valley where there is an absence of a lake outlet or surficial lacustrine deposits, this conclusion was explicitly revealed in the Sixmile–Willseyville trough where ice margin channels funneled water into the ice front. Further support was found in the Cayuga Inlet Valley, where a kettle kame terrane sloped northward into the ice front. Northward drainage was preceded by southerly drainage, with reversal occurring about 16.3 kyr ago. Multi-channel seismic profiles at the south end of Lake Cayuga reveal a south-sourced subaqueous sedimentary fan at the base of the lacustrine sequence. This fan is correlated with a coarse and heterogeneous clastic sequence penetrated in water wells in the City of Ithaca and requires northward drainage into a subglacial lake, which precludes the existence of proglacial lakes Ithaca, Newberry, and Hall. The proposed subglacial flow path is through the Cayuga trough, exiting the ice front eastward in the Mohawk Valley. Subglacial drainage from the Cayuga trough probably was part of a regional subglacial drainage system during the Mackinaw Interstade. Studies north of Lake Ontario have led to the proposal of a subglacial lake in the Ontario basin at that time, which likely also drained into the Mohawk Valley.
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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 | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".