Deep Burrows in Submarine Fan-Channel Deposits of the Cerro Toro Formation (Cretaceous), Chilean Patagonia: Implications For Firmground Development and Colonization in the Deep Sea
Bibliographic record
Abstract
Abstract The Glossifungites ichnofacies recognized in Cretaceous strata (Cerro Toro Formation) of the Magallanes foreland basin in southern Chile represents an important discovery in that it extends the stratigraphic utility of firmground trace-fossil suites into thick-bedded, gravity-flow deposits of submarine fan-channel environments. The trace-fossil suite consists of atypically large Diplocraterion, Skolithos, and Arenicolites, which may reach an inferred length of 7 m. The burrows penetrate muddy, matrix-supported conglomeratic deposits dewatered and consolidated as a result of burial and subsequently exhumed by erosive turbidity currents. In a stratigraphic succession dominated by coarse-grained facies >350 m thick, the burrows are abundant at one stratigraphic horizon correlatable up to 200 km2. This horizon is interpreted as a stratigraphic discontinuity associated with a long-term cessation of coarse-grained, sediment-laden gravity flows into the basin. The colonized surface is the only marker horizon traceable across much of the Magallanes basin study area.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 |
| 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) | 0.000 | 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".