مورد إلكتروني
Terrestrial cosmogenic nuclide surface exposure dating of the oldest glacial successions in the Himalayan orogen: Ladakh Range, northern India
| العنوان: | Terrestrial cosmogenic nuclide surface exposure dating of the oldest glacial successions in the Himalayan orogen: Ladakh Range, northern India |
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| المصدر: | Department of Physics and Astronomy Faculty Publications |
| بيانات النشر: | Purdue University 2006-01-01T08:00:00Z |
| تفاصيل مُضافة: | Owen, L. A. Caffee, M. W. Bovard, K. R. Finkel, R. C. Sharma, M. C. |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Terrestrial cosmogenic nuclide surface exposure dating of moraine boulders and alluvial fan sediments define the timing of five glacial advances over at least the last five glacial cycles in the Ladakh Range of the Transhirnalaya. The glacial stages that have been identified are: the Indus Valley glacial stage, dated at older than 430 ka; the Leh glacial stage occurring in the penultiniate glacial cycle or older; the Kar glacial stage, occurring during the early part of the last glacial cycle; the Bazgo glacial stage, at its maximum during the middle of the last glacial cycle, and the early Holocene Khalling glacial stage. The exposure ages of the Indus Valley moraines are the oldest observed to date throughout the Himalayan orogen. We observe a pattern of progressively more restricted glaciation during the last five glacial cycles., likely indicating a progressive reduction in the moisture supply necessary to sustain glaciation. A possible explanation is that uplift of Himalayan ranges to the south and/or of the Karakoram Mountains to the west of the region may have effectively blocked moisture supply by the south Asian summer monsoon and mid-latitude westerlies, respectively. Alternatively, this pattern of glaciation may reflect a trend of progressively less extensive glaciation in mountain regions that has been observed globally throughout the Pleistocene. |
| مصطلحات الفهرس: | terrestrial cosmogenic nuclide;; surface exposure dating;; transhimalaya;; glacial geology;; geochronology;; ladakh;; late quaternary glaciations;; production-rates;; northwestern himalaya;; mount everest;; arabian sea;; slip rates;; be-10;; pakistan;; monsoon;; moraines, text |
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| الإتاحة: | Open access content. Open access content |
| ملاحظة: | text/html |
| أرقام أخرى: | IPL oai:docs.lib.purdue.edu:physics_articles-1868 1084012447 |
| المصدر المساهم: | PURDUE UNIV From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1084012447 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |