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First cosmic ray exposure dating ( in situ produced 10Be) of the late pleistocene and holocene glaciation in the Nanhutashan Mountains (Taiwan).
- Source :
-
Terra Nova . Oct2007, Vol. 19 Issue 5, p331-336. 6p. 1 Chart, 1 Graph, 1 Map. - Publication Year :
- 2007
-
Abstract
- In Taiwan, efficient climate-driven strong erosion processes are the leading cause for low preservation of geomorphic landforms. Despite the absence of present-day glaciers, glacial relicts have been reported in high altitude areas. These scarce landforms provide opportunities for reconstructing the timing of the last deglaciation in a region where glacial history is poorly documented. We have collected boulders and striated bedrocks in the Nanhutashan area and calculated surface exposure ages based on in-situ produced 10Be concentrations. The oldest glacial remains, dated at 11.1 ± 3.3 ka, correspond to the last glacial advance. The Holocene is characterized by a continuous retreat of the ice-cap until at least 7.2 ± 1.0 ka. Our results are in agreement with a scenario where changes of monsoon regimes lead to a strong reduction of the winter monsoon during the early Holocene, causing a decrease of snow supply and disequilibrium of the hydrological budget. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09544879
- Volume :
- 19
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Terra Nova
- Publication Type :
- Academic Journal
- Accession number :
- 26612239
- Full Text :
- https://doi.org/10.1111/j.1365-3121.2007.00756.x