A contribution to the understanding of late Pleistocene dune sand-paleosol-sequences in Fuerteventura (Canary Islands)

A contribution to the understanding of late Pleistocene dune sand-paleosol-sequences in Fuerteventura (Canary Islands)
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对了解富埃特文图拉岛(加那利群岛)晚更新世沙丘沙-古土壤序列的贡献

DOI:
10.1016/j.geomorph.2015.06.023
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发表时间:
2015
期刊:
影响因子:
3.9
通讯作者:
Zöller L.
Zöller L.
中科院分区:
地球科学2区
文献类型:
--
作者:
Faust D;Yanes Y;Willkommen T;Roettig Ch;Richter Daniel;Richter David;Suchodoletz H. von;Zöller L.

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本文描述了北方富埃特文图拉岛(加那利群岛)四个坑的沙丘砂-古土壤序列。详细的地层学是加强与发光测年,提供第一个时间估计。除全新世崩积层外,该序列跨越了约1000年至约1000年的时期。50卡到CA。280 ka。古土壤形成于冰川时期,表明沙的供应处于停滞状态。从土壤层中提取的陆生腹足类贝壳的同位素组成反映了不同土壤阶段湿度条件的波动。由于风成沙也是在冰期沉积的,因此可以推断土壤的发育仅仅是由独立于气候变化的沙供应减少引起的。我们的地貌,年代学和同位素结果进行了讨论,考虑不同的角度沙丘砂-古土壤夹层,更广泛地说,一般的土壤形成条件。
This paper describes dune sand-paleosol-sequences of four pits in Northern Fuerteventura (Canary Islands). The elaborated stratigraphy is reinforced with luminescence dating to provide a first chronological estimation. Apart from a Holocene colluvial layer, the sequence spans the period from ca. 50 ka to ca. 280 ka. Paleosols were formed during glacial times and point to a standstill in sand supply. The isotopic composition of terrestrial gastropod shells retrieved from soil horizons reflects fluctuations in humidity conditions during different edaphic phases. Because eolian sands were deposited during glacial times as well, it is inferred that soil development was simply caused by a decrease in sand supply independent of climate change. Our geomorphic, geochronological and isotopic results are discussed considering different perspectives of dune sand-paleosol intercalation and more broadly, soil-forming conditions in general.
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