Paleomagnetic evidence for rapid vertical-axis rotation in the Peruvian Cordillera ca. 8 Ma
Bibliographic record
Abstract
Research Article| January 01, 2002 Paleomagnetic evidence for rapid vertical-axis rotation in the Peruvian Cordillera ca. 8 Ma Sonia Rousse; Sonia Rousse 1Institut de Physique du Globe de Paris, Laboratoire de Paléomagnétisme, 4 place Jussieu, 75252 Paris Cedex 05, France Search for other works by this author on: GSW Google Scholar Stuart Gilder; Stuart Gilder 1Institut de Physique du Globe de Paris, Laboratoire de Paléomagnétisme, 4 place Jussieu, 75252 Paris Cedex 05, France Search for other works by this author on: GSW Google Scholar Daniel Farber; Daniel Farber 2Lawrence Livermore National Laboratory, Livermore, California 94550, USA Search for other works by this author on: GSW Google Scholar Brendan McNulty; Brendan McNulty 3Department of Earth Sciences, California State University, Dominguez Hills, Carson, California 90747, USA Search for other works by this author on: GSW Google Scholar Victor R. Torres Victor R. Torres 4Instituto de Geológico Minero y Metalurgico, 1470 Avenida Canadá, San Borja, Lima 41, Peru Search for other works by this author on: GSW Google Scholar Author and Article Information Sonia Rousse 1Institut de Physique du Globe de Paris, Laboratoire de Paléomagnétisme, 4 place Jussieu, 75252 Paris Cedex 05, France Stuart Gilder 1Institut de Physique du Globe de Paris, Laboratoire de Paléomagnétisme, 4 place Jussieu, 75252 Paris Cedex 05, France Daniel Farber 2Lawrence Livermore National Laboratory, Livermore, California 94550, USA Brendan McNulty 3Department of Earth Sciences, California State University, Dominguez Hills, Carson, California 90747, USA Victor R. Torres 4Instituto de Geológico Minero y Metalurgico, 1470 Avenida Canadá, San Borja, Lima 41, Peru Publisher: Geological Society of America Received: 05 Jul 2001 Revision Received: 26 Sep 2001 Accepted: 01 Oct 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2002) 30 (1): 75–78. https://doi.org/10.1130/0091-7613(2002)030<0075:PEFRVA>2.0.CO;2 Article history Received: 05 Jul 2001 Revision Received: 26 Sep 2001 Accepted: 01 Oct 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Sonia Rousse, Stuart Gilder, Daniel Farber, Brendan McNulty, Victor R. Torres; Paleomagnetic evidence for rapid vertical-axis rotation in the Peruvian Cordillera ca. 8 Ma. Geology 2002;; 30 (1): 75–78. doi: https://doi.org/10.1130/0091-7613(2002)030<0075:PEFRVA>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 SocietyGeology Search Advanced Search Abstract Paleomagnetic results from 31 Neogene sites in the Peruvian Andes yield primary magnetizations, as demonstrated by positive fold and reversal tests. Strata dated as 18–9 Ma record a significant counterclockwise rotation (−11° ± 5°), whereas unconformably overlying younger strata (7–6 Ma) are not rotated. The age of rotation thus is between 9 and 7 Ma, a period that coincides with the widespread Quechua 2 deformation phase. Moreover, eight independent studies on 107–9 Ma rocks from Peru between 9°S and 15°S reveal similar and significant rotations (−15° ± 6°). This suggests that the region rotated during a 2 m.y. period of deformation ca. 8 Ma, when the Andes underwent rapid uplift and important deformation commenced in the Subandean zone. 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 | 0.001 |
| 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) | 0.046 | 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; both teacher heads agree on what is shown here.
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".