کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1045923 | 944843 | 2010 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A new shoreline displacement model for the last 7 ka from eastern James Bay, Canada A new shoreline displacement model for the last 7 ka from eastern James Bay, Canada](/preview/png/1045923.png)
The shoreline displacement history of the eastern James Bay lowlands in the last 7 ka has been investigated by means of AMS radiocarbon dating of sediments cored from wetlands. We present twelve radiocarbon dates on macrofossils from six sites spread along a gradient of increasing land age and elevation. Palynomorph analysis (pollen, spores, and dinoflagellate cysts) was used to define the isolation stratigraphy. During the last 7 ka the shoreline elevation has regressed at a decreasing rate. The rate of shoreline emergence was initially rapid (6. 5 m/ 100 yr) between 6850 and 6400 cal yr BP then slowed down to 1.4– 2 m/ 100 yr during the late Holocene. Examination of previous relative sea level data based upon mollusc shells reveals high levels of uncertainty that mask potential temporal variability.
Journal: Quaternary Research - Volume 73, Issue 3, May 2010, Pages 474–484