Biogenic Cross-Lamination Produced by the Pistol-Shrimp <i>Alpheus bellulus</i> in Microcosm Experiments
Bibliographic record
Abstract
Abstract Study of aquaria containing the shrimp Alpheus bellulus and poorly sorted, coarse-grained sand has revealed the potential for macroorganisms to create structures closely resembling ripple cross-lamination, including climbing-ripple cross-lamination. A. bellulus excavates decimeter-scale craters in the sediment, carrying sediment grains up the steep inner (stoss-equivalent) slope of the crater and depositing them on the outside (lee-equivalent side). The fabrics produced resemble hydrodynamically produced ripple cross-lamination, particularly when observed in the limited cross sections available in core. This biogenic cross-lamination can be distinguished from hydrodynamic cross-lamination in that the biogenic cross-lamination is steeper than is typical for current-generated ripple cross-lamination, the tabular foresets are close to angle of repose, and the structure has a circular ripple crest.
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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 | 0.006 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| Insufficient payload (model declined to judge) | 0.004 | 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".