Cover beds older than the mid-pleistocene revolution and the provenance of their eolian components, La Sal Mountains, Utah, USA
Cover beds older than the mid-pleistocene revolution and the provenance of their eolian components, La Sal Mountains, Utah, USA
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比更新世中期革命更古老的覆盖层及其风成成分的来源,美国犹他州拉萨尔山脉
DOI:
10.1016/j.quascirev.2018.01.012
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发表时间:
2018
影响因子:
4
通讯作者:
Kleber
中科院分区:
文献类型:
--
作者:
Krautz;Gärtner;Andreas;Hofmann;Linnemann;Kleber
We used uranium-lead (U-Pb) dating of zircons from a tephra layer deposited in the La Sal Mountains to assign an age of more than c. 1.3 Ma to underlying loess-mixed slope deposits (cover beds) and paleosols developed therein. For the first time, we show that properties of cover beds and soils before the Mid-Pleistocene Revolution were similar to those formed after the revolution. However, the deepest exposed carbonate-enriched horizon is much farther developed than younger ones, indicating that there was a period of enrichment by far exceeding intensities of younger calcic horizons some time before the revolution, possibly in Neogene times. Remarkable differences between age distributions of detrital zircons (DZ) within the cover beds allow reconstructing the regional provenance of mixed eolian matter with high accuracy: we were able to trace particular cover beds back to areas with outcropping Permian and Upper Cretaceous rocks.
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影响因子:
2.5
作者:
Christian Rønnevik;A. K. Ksienzyk;H. Fossen;J. Jacobs
通讯作者:
J. Jacobs
影响因子:
2.9
作者:
T. Spell;T. Harrison;J. Wolff
通讯作者:
J. Wolff
DOI:
10.5194/egqsj-67-7-2018
发表时间:
2018
期刊:
EG Quaternary Science Journal
影响因子:
--
作者:
Krautz;Hofmann;Gärtner;Andreas;Linnemann;Kleber
通讯作者:
Kleber
影响因子:
2.9
作者:
G. Walsh;J. Aleinikoff
通讯作者:
J. Aleinikoff
影响因子:
2.9
作者:
A. Kleber
通讯作者:
A. Kleber