www.elsevier.com/locate/margeo Climate cyclicity in late Holocene anoxic marine sediments from the Seymour–Belize Inlet Complex, British Columbia
Bibliographic record
Abstract
An 8.72 m late Holocene sediment core (VEC02A07) obtained from Alison Sound in the Belize–Seymour Inlet Complex of central British Columbia, Canada was deposited between ∼3500–1000 yr BP under primarily anoxic marine conditions. This core contains a detailed cyclic record of land–sea interactions as evidenced by significant fluctuations in marine primary productivity and changes in the supply of terrigenous material that can be related to long term variation in the relative influence of the Aleutian Low (AL) and North Pacific High (NPH). Sedimentologically, the core is characterized by alternating intervals of fine-grained massive intervals (70%), laminated intervals (23%), turbidites (5%) and graded silt–clay layers (2%). The laminated intervals are comprised of couplets that vary between light-coloured, diatom-rich layers, deposited primarily during the summer months, and dark-coloured, mineral-rich layers deposited during winter. Laminated couplets are most common in portions of the core deposited between ∼3150 and 2700 yr BP, which corresponds to an episode of regional neoglaciation. Time-series analysis was carried out on high-resolution particle size measurements obtained from core sub-samples and on sediment grey-scale colour variability derived from X-ray scans of the core. Non-linear time-series analyses revealed that the succession of massive and laminated sedimentation displayed characteristics of self-organization following a power law relationship for core length segments of b13 cm (b∼50 years of deposition). Wavelet and spectral time-series analysis indicated
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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 | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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".