A petrologic study of the Teanaway Basalt: Eocene slab window volcanism in Central WA
Bibliographic record
Abstract
The Teanaway Basalt (TB) includes subaerial basalt to andesite flows, mafic to felsic tuffs, and rhyolite domes in the Central Cascades of Washington State. These volcanics overlie the extensive ~47 Ma Teanaway Dike Swarm (TDS) that cuts the underlying Swauk Formation. Samples were collected from 3 main localities: Easton Ridge (ER) in the west, Liberty Ridge (LR) in the east, and the Middle Fork of the Teanaway River (MF) in the center.\nThe bimodal TB consists predominantly of basaltic andesite and andesite (45.3–63.1 wt% SiO2) with subordinate rhyolite (75.9–79.4 wt% SiO2). The mafic rocks classify as primarily medium-K tholeiites (0.1–3.0 wt% K2O), but a few samples classify as alkaline. Possible tectonic settings suggested by graphs and diagrams include an arc setting, MOR, or within-plate volcanism.\nER and LR differ mainly in rare-earth element (REE) contents, and also show different concentrations of Fe2O3T, TiO2, MnO, and Na2O. Pearce element ratio plots suggest much of the variation reflects different degrees of plagioclase + clinopyroxene fractionation. With increasing stratigraphic height LR samples exhibit a general trend of decrease in SiO2 and increase inCaO, MnO, P2O5, and cycles of decrease followed by increase in Mg#.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.009 | 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 teacher head, 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".