Bibliographic record
Abstract
During September 1964 the Dominion Observatory established 230 underwater gravity stations on a reconnaissance survey of Lake Superior. The Bouguer anomalies, which are presented in the form of an anomaly map, range from −90 to +25 mgal and present a complex pattern in the western part of the lake. Those over the lake may be reasonably explained in terms of surface geology, positive anomalies being produced by middle Keweenawan basalt, and negative by late Keweenawan or Cambrian sediment or Archean granite. The Keweenaw High, a positive anomaly belt between the Porcupine Mountains and Isle Royale, is thought to be an extension of the Midcontinental Gravity High. Although this feature can be explained by near-surface density variations it is also quantitatively interpreted in the light of the results of the Lake Superior seismic experiment, which indicates a thick, high-density crust beneath Lake Superior. The high crustal seismic velocities observed are consistent with the generally positive gravity anomalies over the lake, which indicate the presence of high-density rocks within the crustal column. However, the large variations of crustal thickness determined seismically appear to be localized and due to crustal rifting.
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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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 0.001 |
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".