کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6350632 | 1622263 | 2011 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Glacioeustasy during the middle Eocene? Insights from the stratigraphy of the Hampshire Basin, UK
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
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چکیده انگلیسی
Sedimentary and fossil evidence supports episodic uplift in the eastern part of the Hampshire Basin during the Bartonian, which at present precludes the calculation of eustatic sea-level. However, the amplitude and frequency of water-depth variations identified in the Barton Clay Formation, and correlations to published sea-level curves, are consistent with a component of these changes being glacioeustatic during the middle Eocene. There is also evidence for a large excursion (δ18O > 1â°) in the mono-specific benthic foraminiferal oxygen-isotope record (Alum Bay) ~ 39.9 Ma, which is correlated to the isotope excursion at the 'middle Eocene climatic optimum' previously reported in the Southern Ocean, and other localities. A contemporaneous water-depth increase of ~ 40 m at Alum Bay may indicate that a component of this 'global' oxygen-isotope excursion results from a reduction in continental ice storage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 300, Issues 1â4, 1 February 2011, Pages 84-100
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 300, Issues 1â4, 1 February 2011, Pages 84-100
نویسندگان
Caroline F. Dawber, Aradhna K. Tripati, Andrew S. Gale, Conall MacNiocaill, Stephen P. Hesselbo,