The Role of an Organic Slime Matrix in the Formation of Pyritized Burrow Trails and Pyrite Concretions
Bibliographic record
Abstract
Other| February 01, 2002 The Role of an Organic Slime Matrix in the Formation of Pyritized Burrow Trails and Pyrite Concretions JÜRGEN SCHIEBER JÜRGEN SCHIEBER 1Department of Geology, The University of Texas at Arlington, Arlington, TX 76019 Search for other works by this author on: GSW Google Scholar Author and Article Information JÜRGEN SCHIEBER 1Department of Geology, The University of Texas at Arlington, Arlington, TX 76019 Publisher: SEPM Society for Sedimentary Geology Accepted: 01 Sep 2001 First Online: 03 Mar 2017 Online ISSN: 1938-5323 Print ISSN: 0883-1351 Society for Sedimentary Geology PALAIOS (2002) 17 (1): 104–109. https://doi.org/10.1669/0883-1351(2002)017<0104:TROAOS>2.0.CO;2 Article history Accepted: 01 Sep 2001 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation JÜRGEN SCHIEBER; The Role of an Organic Slime Matrix in the Formation of Pyritized Burrow Trails and Pyrite Concretions. PALAIOS 2002;; 17 (1): 104–109. doi: https://doi.org/10.1669/0883-1351(2002)017<0104:TROAOS>2.0.CO;2 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 SocietyPALAIOS Search Advanced Search Abstract Sandstones from the Black Island member of the Winnipeg Formation (Ordovician) contain a variety of early diagenetic iron sulfide morphologies, including elongate concretions of variable length. Examination of sandstone samples with X-radiography reveals that these concretions, now consisting of pyrite, are associated with burrows.Detailed textural examination of the pyrite shows an anomalously loose packing of sand grains within these concretions, and also suggests that iron sulfide nucleation commenced at multiple sites in what must have been a stiff matrix. Compositional data acquired by electron microprobe indicate that the iron sulfides did not replace fecal matter left behind by the burrower. Sulfur isotope data point to bacterial sulfate reduction as a sulfide source, corroborated by fossilized bacterial remains within the concretionary pyrite.Mucus and slime trails of marine benthos were probably important for early diagenetic pyrite production in these sediments; they can be considered a favorable "culture" medium for sulfate reducing bacteria. Because the mucus seems to mineralize very early in burial history, it also provides for enhanced preservation of bacterial remains. 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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".