Application of high-resolution seismic-reflection techniques in Champlain Sea sediments near Lachute - Saint-Benoît, Quebec
Bibliographic record
Abstract
High-resolution seismic-reflection techniques have been tested and applied at several sites northwest of Montréal where thick Quaternary deposits were suspected. This work was conducted as an aid in determining the three-dimensional structure of the Holocene and Pleistocene stratigraphy in the area for ongoing NATMAP and groundwater studies. Initial test seismic arrays indicated areas with substantial thicknesses of overburden above bedrock, several reflecting horizons interpreted as distinct lithological contacts, and high-frequency reflection sig- nals providing good vertical resolution. From the initial testing results, specific survey lines were selected, and common mid-point reflection techniques were designed to optimize the rate and quality of data acquisition. A modi- fied form of 'centre-spread' shooting was adopted, that not only provided adequate stacking (12 fold), but also allowed improved estimates of subsurface velocities required for seismic processing. An example of processed seismic section shows excellent stratigraphic detail.
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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 | 0.001 |
| Science and technology studies | 0.001 | 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) | 0.001 | 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".