The deglacial to postglacial marine environments of<scp>SE</scp><scp>B</scp>arrow<scp>S</scp>trait,<scp>C</scp>anadian<scp>A</scp>rctic<scp>A</scp>rchipelago
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Core 86027‐144 (74°15.56′ N , 91°14.21′ W ) represents a rare, continuous record of L ate P leistocene to H olocene sediments from H igh A rctic C anada extending from the end of the L ast G laciation. Based on microfossils (dinocysts, non‐pollen palynomorphs, benthic and planktonic foraminifera), foraminiferal δ 18 O and δ 13 C , and sedimentology, seven palaeoenvironmental zones were identified. Zone I (>10.8 cal. ka BP ) records deglaciation, ice‐sheet destabilization, float‐off and subsequent break‐up. Zone II ( c. 10.8–10.4 cal. ka BP ) shows ice‐proximal to ice‐distal glaciomarine conditions, interrupted by pervasive land‐fast sea‐ice marked by a hiatus in coarse sediment deposition. Significant biological activity starts in Zone III (10.4–9.9 cal. ka BP ), where planktonic foraminifera ( N eogloboquadrina pachyderma ) suggest early oceanic throughflow. Surface waters flowed NW–SE ; however, the deep‐water origin remains unclear (potentially NW A rctic O cean or B affin B ay). Postglacial amelioration (open‐water season greater than present) in Zone IV (9.9–7.8 cal. ka BP ) perhaps corresponds to the regional ‘Holocene Thermal Maximum’ previously proposed. A transitional period (Zone V ; 7.8–6.7 cal. ka BP ) of rapid environmental change fluctuating on a scale not observed today is marked by increasing sea‐ice and reduced oceanic influence. This probably signals the exclusion of deeper A tlantic water owing to the glacio‐isostatic shallowing of inter‐island sills, coupled with generally cooling climate. Conditions analogous to those at present, with increased sea‐ice and modern microfossil assemblages, commence at c. 6.7 cal. ka BP (zones VI – VII ). Although climate ultimately forces long‐term environmental trends, core 86027‐144 data imply that regional dynamics, especially changes in sea‐level, exert a significant control on marine conditions throughout the C anadian A rctic A rchipelago.
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.
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 | 0.005 | 0.024 |
| Meta-epidemiology (narrow) | 0.003 | 0.003 |
| Meta-epidemiology (broad) | 0.003 | 0.001 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.004 | 0.004 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.006 | 0.001 |
| Research integrity | 0.003 | 0.004 |
| Insufficient payload (model declined to judge) | 0.001 | 0.010 |
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 it