Bedrock Map of the Ester Lake Quadrangle, Lake and Cook County, The Boundary Waters Canoe Area Wilderness, Northeastern Minnesota
Bibliographic record
Abstract
This map portrays detailed bedrock geology of an 8 mile2 area adjacent to the US-Canadian border in the Ester Lake 7.5 minute quadrangle. The area was incorporated in previous regional scale-mapping by Leith (1910) and Gruner (1941), and parts were mapped in the 1970’s and 1980’s by graduate students of the University of Minnesota Duluth. Historically, mapping was focused on lakeshores and waterways. A wind storm in 1999 and subsequent Cavity Lake forest re of 2006 generated impressive exposure of bedrock and easier access to inland areas. A preliminary geologic map of the fire area was generated by Jirsa and Starns (2008), based on previous work and some localized traverses. Subsequent mapping by Jirsa and students of the Precambrian Research Center during the 2008- 2012 field seasons will allow publication of a final map of the Cavity Lake fire area in 2012. This map depicts diverse geological structure and lithology representing crustal evolution spanning the Archean to Proterozoic Eons. The Archean rocks represent a granite-greenstone terrane within the Wawa subprovince of the Superior Province of the Canadian Shield. The Ester Lake 7.5-minute quadrangle consists of metabasaltic rocks of unknown age, but possibly equivalent to the Ely Greenstone (ca. 2722), the 2690 Ma Saganaga Tonalite (Driese and others, 2011), and arkose, conglomerate, greywacke, slate, and iron-formation of the Knife Lake Group. Field evidence indicates that the Saganaga Tonalite was uplifted and subaerially eroded, generating tonalitic detritus to nearby basins, now manifest as Knife Lake Group strata. All rock types on the map sheet appear to have been metamorphosed to low greenschist facies.
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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 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.020 | 0.003 |
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".