Micromorphology and development of interfluve paleosols: a case study from the Cenomanian Dunvegan Formation, NE British Columbia, Canada
Bibliographic record
Abstract
Research Article| March 01, 2002 Micromorphology and development of interfluve paleosols: a case study from the Cenomanian Dunvegan Formation, NE British Columbia, Canada P.J. McCarthy P.J. McCarthy Department of Geology and Geophysics and Geophysical Institute, University of Alaska, Fairbanks, AK 99775–5780, USA. Search for other works by this author on: GSW Google Scholar Bulletin of Canadian Petroleum Geology (2002) 50 (1): 158–177. https://doi.org/10.2113/50.1.158 Article history received: 18 May 2001 accepted: 15 Sep 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 P.J. McCarthy; Micromorphology and development of interfluve paleosols: a case study from the Cenomanian Dunvegan Formation, NE British Columbia, Canada. Bulletin of Canadian Petroleum Geology 2002;; 50 (1): 158–177. doi: https://doi.org/10.2113/50.1.158 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 An obvious use of paleopedology for sequence stratigraphic analysis lies in the demarcation of erosional discontinuities or major pauses in sedimentation that allow us to recognize and map stratigraphically important surfaces, both in outcrop and subsurface. Many interfluve surfaces may be apparent on the basis of sedimentology and regional stratigraphy alone; however, their appearance can change markedly across a study area, making correlation difficult. A pedosedimentary approach has been utilized to reconstruct the sequence of pedogenic and sedimentary events recorded by the development of stratigraphically significant interfluve surfaces. This was based upon sets of closely-spaced thin sections taken from interfluve sequence-bounding paleosols exposed at Beatton River canyon, British Columbia, Canada. Micromorphology, field morphologies, and major physicochemical characteristics of three interfluve paleosols reveals a complex sequence of soil development related both to normal floodplain sedimentation and to periods of prolonged stasis resulting from valley incision. Two main pedosedimentary stages, related to regional changes in rates of generation of accommodation, are recorded at each interfluve, although the resolution, processes, and resultant features vary in a manner reflecting local differences in hydrology, topography, initial parent material composition, and time. These processes have operated through various pedogenic development pathways to produce polygenetic paleosol profiles on these Cretaceous interfluves. The pedosedimentary approach followed in this case study provides a means of deciphering the development of interfluve paleosols based upon detailed microstratigraphic associations and depth functions of their pedogenic features, in conjunction with ancilliary geochemical, mineralogical, sedimentological, and stratigraphic evidence. Consequently, potential sequence boundaries, identified on the basis of regional stratigraphic patterns, can be determined with a high degree of confidence on the basis of intrinsic evidence derived from the record of ancient landscape processes preserved within the interfluve paleosols. This content is PDF only. Please click on the PDF icon to access. 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 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) | 0.017 | 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".