کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4725016 1639863 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constraining the age of rock art by dating a rockfall event using sediment and rock-surface luminescence dating techniques
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Constraining the age of rock art by dating a rockfall event using sediment and rock-surface luminescence dating techniques
چکیده انگلیسی

Optically stimulated luminescence (OSL) is used to determine the age of a rockfall event that removed part of the pictograph figures at the Great Gallery rock art panel in Canyonlands National Park, Utah, USA. Analyses from the outer millimeter of the buried surface of a rockfall boulder and quartz grains from the underlying sediment both provide consistent ages that also agree with an AMS radiocarbon age of a cottonwood leaf found immediately between the clast and underlying sediment. Measurement of the OSL signals as a function of depth into the surface of the boulder clearly shows that there is no detectable increase in the OSL signal to a depth of at least 3 mm suggesting that the OSL signal was fully reset to this depth before burial. Consistent OSL and radiocarbon ages for this rockfall event provide a minimum age of ∼900 a for the Great Gallery, which is the type locality of Barrier Canyon Style rock art with a controversial and unknown origin.


► We use two optically stimulated luminescence approaches to date a rockfall event.
► The buried surface of a rockfall clast and the sediment underneath are the same age.
► Luminescence ages from both approaches agree with an independent radiocarbon age.
► The dated rockfall removed pigment from the overlying Great Gallery rock art panel.
► The Great Gallery rock art panel was created more than 900 years before 2010.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Geochronology - Volume 13, December 2012, Pages 18–25
نویسندگان
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