Integrated, high-resolution allostratigraphic, biostratigraphic and carbon-isotope correlation of Coniacian Strata (Upper Cretaceous), Western Alberta and Northern Montana
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
Inoceramid bivalves are the dominant invertebrate fauna of the Coniacian and basal Santonian of \nthe Western Canada Foreland Basin in western Alberta. In the upper lower Coniacian through to basal \nSantonian, six successive faunas are recognized, which provide the basis for corresponding, formally \ndefined inoceramid zones. From bottom upward these are the zones of: Cremnoceramus crassus crassus \n/C. deformis deformis, Inoceramus gibbosus, Volviceramus koeneni, Volviceramus involutus, Sphenoceramus \nsubcardissoides, and Sphenoceramus ex gr. pachti. Particular faunas represent assemblages known \nwidely from the Euramerican biogeographic region, although they characterize mostly its northern, \nboreal area. The inoceramid-based biostratigraphic scheme allows correlation with other parts of the \nNorth American Western Interior and with parts of the Euramerican biogeographic region. \nThe studied succession provides a good record of the Inoceramus gibbosus Zone, which characterizes \nthe topmost lower Coniacian. This zone, first recognized from northern Germany, is usually \nabsent, both in Europe and in North America, due to a stratigraphic gap resulting from a eustatic \nlowstand. The base of the middle Coniacian is marked by the abrupt appearance of the taxonomically \nvariable Volviceramus fauna (V. koeneni (Müller), V. exogyroides (Meek and Hayden)), with associated \nInoceramus undabundus Meek and Hayden and Volviceramus cardinalensis, newly described \nherein. Scaphites (Scaphites) ventricosus Meek and Hayden, the ammonite marker of the base of the \nmiddle Coniacian first appears in the late early Coniacian. The base of the upper Coniacian marks \nthe first appearance of the characteristic northern inoceramid species Sphenoceramus subcardissoides \n(Schlüter), the appearance of which coincides with Scaphites (Scaphites) depressus Reeside, the \nammonite marker of this boundary. Close to this boundary Volviceramus stotti also appears, which \nis newly described from the Canadian sections. The base of the Santonian corresponds to the abrupt \nappearance of Sphenoceramus ex gr. pachti (Arkhangelsky). \nThe studied sections demonstrate that the appearance of new inoceramid faunas (lowest occurrence \nof Cremnoceramus crassus crassus (Petrascheck), of various species of Volviceramus, Sphenoceramus \nsubcardissoides (Schlüter) and of S. ex gr. pachti) takes place immediately above major \nmarine flooding surfaces, suggesting a close correspondence between evolutionary and/or migration \nevents and episodes of relative sea-level rise.
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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.002 | 0.000 |
| Science and technology studies | 0.001 | 0.003 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| 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 it