Academic Journal
Paleomagnetic constraints on the Permian•Triassic boundary in terrestrial strata of the Karoo Supergroup, South Africa: implications for causes of the end-Permian extinction event
| العنوان: | Paleomagnetic constraints on the Permian•Triassic boundary in terrestrial strata of the Karoo Supergroup, South Africa: implications for causes of the end-Permian extinction event |
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| المؤلفون: | M. O. De Kock, J. L. Kirschvink |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://www.gps.caltech.edu/~jkirschvink/pdfs/GondwanaResearch.pdf. |
| سنة النشر: | 2004 |
| المجموعة: | CiteSeerX |
| مصطلحات موضوعية: | Permian-Triassic boundary, extinction, paleomagnetism, Karoo Supergroup, South Africa |
| الوصف: | The closure of the Palaeozoic witnessed the greatest biotic crisis in earth history. Surprisingly little is known about the effects and timing of the terrestrial counterpart of the well-described End-Permian mass extinction from known marine successions worldwide. In the present study, reliable paleomagnetic results were obtained from a PT boundary section in the terrestrial Karoo Basin of South Africa. Permo-Triassic aged mudstones from a locality in the Eastern Cape Province yielded two magnetic chrons, reverse followed by normal (with the boundary possibly close to the reversal). This extends to results from a previous study: thereby jointly identifying a R/N/R polarity pattern for this boundary interval. The PTB interval is constrained below the red mudstones of the Beaufort Group at the present locality and within reverse-magnetised green mudstone, implying a diachronic relation between the marine and terrestrial End-Permian mass extinction events. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.561.1987; http://www.gps.caltech.edu/~jkirschvink/pdfs/GondwanaResearch.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.561.1987 http://www.gps.caltech.edu/~jkirschvink/pdfs/GondwanaResearch.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.AEF8435C |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |