کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1045644 | 944826 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Recently exposed vegetation reveals Holocene changes in the extent of the Quelccaya Ice Cap, Peru
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Recently exposed vegetation reveals Holocene changes in the extent of the Quelccaya Ice Cap, Peru Recently exposed vegetation reveals Holocene changes in the extent of the Quelccaya Ice Cap, Peru](/preview/png/1045644.png)
چکیده انگلیسی
Radiocarbon dating of well-preserved, in-place vegetation exposed by the retreating Quelccaya Ice Cap of southeastern Peru constrains the last time the ice cap's extent was smaller than at present. Seventeen plant samples from two sites along the central western margin collectively date to 4700 and 5100 cal yr BP and strongly indicate that current ice cap retreat is unprecedented over the past â¼Â 5 millennia. Seventeen vegetation samples interbedded in a nearby clastic sedimentary sequence suggest ice-free conditions at this site from â¼Â 5200 to at least â¼Â 7000 cal yr BP, and place minimum constraint on early- to mid-Holocene ice cap extent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Research - Volume 72, Issue 2, September 2009, Pages 157-163
Journal: Quaternary Research - Volume 72, Issue 2, September 2009, Pages 157-163
نویسندگان
Aron M. Buffen, Lonnie G. Thompson, Ellen Mosley-Thompson, Kyung In Huh,