Neoglacial chronology and floristics in the Middle Teton area, central Teton Range, Western Wyoming
作者:
William C. Mahaney,
John R. Spence,
期刊:
Journal of Quaternary Science
(WILEY Available online 1990)
卷期:
Volume 5,
issue 1
页码: 53-66
ISSN:0267-8179
年代: 1990
DOI:10.1002/jqs.3390050106
出版商: John Wiley&Sons, Ltd
关键词: Neoglacial Stratigraphy;soil stratigraphy;Holocene plant dynamics
数据来源: WILEY
摘要:
AbstractThe relative ages of Neogfacial deposits above 2900m near Cloudveil Dome, Middle Teton, and Teepe glaciers, central Teton Range, western Wyoming, were determined using topographic position, weathering features, lichenometry, vegetation characteristics, and soils. A three‐fold deposit sequence is identified and correlated with the Gannett Peak, Audubon and Indian Basin Neoglacial advances described elsewhere in the Teton and nearby Wind River ranges. While soil profile morphology proved very useful in distinguishing deposits of different age, other age indicators such as clay mineralogy and soil chemistry, proved of only marginal value in age discrimination. This chronosequence, emplaced over the last ∼5000yr, provides an excellent setting upon which to test changes in plant species composition and its use as a relative dating method.Vascular plant species composition cannot be used to discriminate deposits of the different advances, possibly because of random colonisation and establishment combined with extensive mass wasting during the Neoglacial. However, certain vegetation features, such as total cover and species densities, appear useful as relative dating meth
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