Revised stratigraphy of the Middle Devonian (Givetian) Winnipegosis Carbonate-Prairie Evaporite Transition, Elk Point Group, southern Saskatchewan
Bibliographic record
Abstract
Research Article| December 01, 2001 Revised stratigraphy of the Middle Devonian (Givetian) Winnipegosis Carbonate–Prairie Evaporite Transition, Elk Point Group, southern Saskatchewan Jisuo Jin; Jisuo Jin Department of Earth Sciences, University of Western Ontario, London, ON N6A 5B7 Search for other works by this author on: GSW Google Scholar Katherine M. Bergman Katherine M. Bergman Department of Geology, University of Regina, Regina, SK S4S 0A2 Search for other works by this author on: GSW Google Scholar Author and Article Information Jisuo Jin Department of Earth Sciences, University of Western Ontario, London, ON N6A 5B7 Katherine M. Bergman Department of Geology, University of Regina, Regina, SK S4S 0A2 Publisher: Canadian Society of Petroleum Geologists Received: 01 Nov 2000 Accepted: 01 Apr 2001 First Online: 02 Mar 2017 Online ISSN: 2368-0261 Print ISSN: 0007-4802 © The Society of Canadian Petroleum Geologists Bulletin of Canadian Petroleum Geology (2001) 49 (4): 441–457. https://doi.org/10.2113/49.4.441 Article history Received: 01 Nov 2000 Accepted: 01 Apr 2001 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jisuo Jin, Katherine M. Bergman; Revised stratigraphy of the Middle Devonian (Givetian) Winnipegosis Carbonate–Prairie Evaporite Transition, Elk Point Group, southern Saskatchewan. Bulletin of Canadian Petroleum Geology 2001;; 49 (4): 441–457. doi: https://doi.org/10.2113/49.4.441 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of Canadian Petroleum Geology Search Advanced Search Abstract The Ratner Member was previously included in the Middle Devonian Winnipegosis Formation of the Elk Point Basin. Recent studies, however, have demonstrated that the Ratner Member was not genetically related to the Winnipegosis Formation in terms of depositional environments and thus should not be part of the Winnipegosis Formation. In this paper we propose that the Ratner Member be raised to formational status. In the northern portion (Saskatoon–Quill Lake area) of the Saskatchewan sub-basin, the type section of the Ratner Formation comprises three vertically stacked brining-upward successions, each of which consists of a basal unit of carbonate laminite, a middle unit of interlaminated carbonate and anhydrite, and a capping unit of enterolithic bedded anhydrite. Compared to the type section, the Ratner Formation in the southern part of the Saskatchewan sub-basin has a number of distinct features, including: (1) a much darker grey colour because of its greater proportion of organic-rich partings, (2) more pervasive development of fine, crinkly lamination or cryptalgal structures, (3) considerably less common enterolithic anhydrite beds, (4) more common calcitization of anhydrite, whereby anhydrite laminae were altered to coarsely crystalline white dolomite, (5) less common occurrences of contorted, interlaminated dolomite and anhydrite caused by displacive anhydrite growth, and (6) predominance of single-cycled laminite succession. Most of these characteristics, especially the darker-grey colour and general lack of multiple cycles, are interpreted as the result of deposition of the laminite in a deeper-water setting in the southern part of the Saskatchewan sub-basin, where more frequent and prolonged plankton blooms and fewer desiccation episodes would have prevailed. The Ratner Formation is interpreted to have formed during the transitional phase of the Elk Point Basin from a reefal environment to a large intracratonic salina. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.006 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 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".