INTERGLACIAL POLLEN SPECTRA FROM SEL-AYRE, SHETLAND
INTERGLACIAL POLLEN SPECTRA FROM SEL-AYRE, SHETLAND
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DOI：
10.1111/j.1469-8137.1979.tb07477.x
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发表时间：
1979-01-01
期刊：
影响因子：
9.4
通讯作者：
PEGLAR, SM
中科院分区：
文献类型：
--
作者：
BIRKS, HJB;PEGLAR, SM
描述了设得兰群岛大陆沃尔半岛上Sel Ayre出露剖面的岩石地层学特征。50 cm厚的泥炭层上覆盖着7.3 m的砂、砾石和巨砾粘土。该泥炭层和砂中泥炭纹层的花粉分析揭示了3种不同的花粉组合。这些组合被解释为反映了植被的发展，从草和蕨类植物占主导地位的社区肥沃的棕壤矮灌木石楠为主的杜鹃花科灌木，包括Bruckenthalia spiculifolia。这些石南生长在富含腐殖酸的灰壤上，被开放的、以草为主的社区所取代。Sel Ayre花粉光谱与设得兰群岛其他站点花粉数据的主成分分析的数值比较表明，3个间冰期代表设得兰群岛大陆：Flandrian，Ipswichian和Hoxnian。根据推测的长距离树花粉雨的成分，Sel Ayre序列与伊普斯威奇阶相关。设得兰群岛提出了一个基本的间冰期旋回。
The lithostratigraphy of a section exposed at Sel Ayre on the Walls Peninsula, Shetland Mainland is described. A peat bed 50 cm thick is overlain by 7.3 m of sands, gravels and boulder clay. Pollen analyses of this peat bed and of peat laminae in the sands reveal 3 distinctive pollen assemblages. These assemblages are interpreted as reflecting a vegetational development from grass- and fern-dominated communities on fertile brown-earths to dwarf-shrub heaths dominated by ericaceous shrubs including Bruckenthalia spiculifolia. These heaths grew on acid humus-rich podsols and were replaced by open, grass-dominated communities. Numerical comparisons of the Sel Ayre pollen spectra with pollen data from other sites on Shetland using principal components analysis suggest that 3 interglacial stages are represented on Shetland Mainland: Flandrian, Ipswichian and Hoxnian. Based on the composition of the presumed long-distance tree-pollen rain, the Sel Ayre sequence is correlated with the Ipswichian stage. A basic interglacial cycle is proposed for the Shetlands.