Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.aeolia.2015.06.007 |
Landward-advancing Quaternary eolianites of Bermuda | |
Rowe, Mark P.; Bristow, Charlie S. | |
通讯作者 | Rowe, Mark P. |
来源期刊 | AEOLIAN RESEARCH |
ISSN | 1875-9637 |
EISSN | 2212-1684 |
出版年 | 2015 |
卷号 | 19页码:235-249 |
英文摘要 | The landscape of Bermuda is dominated by Quaternary carbonate cemented dunes, or "eolianites", which form the islands’ topography. Sections through the dunes are revealed in extensive natural and man-made rock faces, which expose the dune stratigraphy as well as the preserved morphology. An analysis of 3751 foreset measurements confirms the conclusion reached by earlier researchers that Bermuda’s dunes advanced sub-perpendicularly to the coast in a landward direction away from source beaches. Dune orientation, being multi-directional, is not consistent with northeast net sand transportation predicted by a drift potential analysis of modern wind data. The putative predisposition of Bermuda’s carbonate dunes to rapid cementation is supposed to have curtailed their landward advance such that younger dunes developed as static ridges at the seaward margin of their lithified predecessors. Geological mapping has revealed, however, that in many cases young dunes did advance inland onto interior terrain, overstepping older dune ridges. Molds of large trees, preserved within the dunes, and a sharp contact of steep slip-face dune foresets on palaeosols evoke the encroachment of landward-advancing precipitation ridges into a forested landscape. The internal structure of the dunes, featuring thick sets of slip-face foresets truncated by sub-horizontal planar bounding surfaces, uphold the ascendancy of sand transportation processes over those of sand retention and vertical accretion. Although meteoric cementation was responsible for the ultimate preservation of eolianite ridges which dominate Bermuda’s landscape, it took effect too slowly to influence the behaviour of the carbonate dunes at the time of their emplacement. (C) 2015 Elsevier B.V. All rights reserved. |
英文关键词 | Eolianite Carbonate coastal dunes Dune cementation Advancing dunes Transgressive dunes Bermuda geology |
类型 | Article |
语种 | 英语 |
国家 | England |
收录类别 | SCI-E |
WOS记录号 | WOS:000367023000010 |
WOS关键词 | COASTAL SAND DUNES ; SEDIMENTARY STRUCTURES ; TRACE FOSSILS ; NORTH-AMERICA ; U-SERIES ; AUSTRALIA ; STRATIGRAPHY ; ISRAEL ; BEACH ; DESERTS |
WOS类目 | Geography, Physical |
WOS研究方向 | Physical Geography |
来源机构 | University of London |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/185507 |
作者单位 | Univ London, Dept Earth & Planetaty Sci, London WC1E 7HX, England |
推荐引用方式 GB/T 7714 | Rowe, Mark P.,Bristow, Charlie S.. Landward-advancing Quaternary eolianites of Bermuda[J]. University of London,2015,19:235-249. |
APA | Rowe, Mark P.,&Bristow, Charlie S..(2015).Landward-advancing Quaternary eolianites of Bermuda.AEOLIAN RESEARCH,19,235-249. |
MLA | Rowe, Mark P.,et al."Landward-advancing Quaternary eolianites of Bermuda".AEOLIAN RESEARCH 19(2015):235-249. |
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