干旱区生态环境知识资源中心(Arid): Changing rates of escarpment retreat linked to environmental change in a sedimentary tableland, Stołowe Mountains, SW Poland

Arid

DOI	10.1016/j.geomorph.2024.109314
	Changing rates of escarpment retreat linked to environmental change in a sedimentary tableland, Stołowe Mountains, SW Poland
	Duszynski, Filip; Jancewicz, Kacper; Migon, Piotr; Waroszewski, Jarosaw; Christl, Marcus; Tikhomirov, Dmitry; Egli, Markus
通讯作者	Duszynski, F
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2024
卷号	461
英文摘要	Long-term rates of escarpment retreat in sedimentary tablelands have been rarely determined and their possible variability in relation to major environmental changes has often been speculative, especially in older contributions. Moreover, rates reported so far were almost exclusively from arid regions. In this paper we present a dataset of 20 cosmogenic exposure ages, obtained for cliffs and boulders produced by rock-slope disintegration, left in front of a retreating 150-m-high escarpment of a sandstone mesa in SW Poland. The most distant boulders are >400 m away from the cliffs. Following previous research in the region, boulders are mainly products of in situ disintegration and hence, their present-day position on the slope approximates the past position of the cliffs, allowing for the calculations of cliff retreat. Exposure ages systematically increase with the distance from the present-day cliff line and cover the last 100 kyr, implying an average retreat rate of 4.18 mm/yr. However, the dataset splits into several sub-populations, each with its own trend, meaning that the rates of retreat varied with time. A maximum was reached during the Late Pleistocene and transition to the Holocene, when the rates exceeded 10 mm/yr and may have reached 100 mm/yr. The rates seemed distinctly lower between MIS5 and LGM and during the Holocene. We propose that the transition towards a warmer climate at the Pleistocene/Holocene boundary, with an increased frequency of freezing-thawing cycles, the degradation of permafrost and unblocking of groundwater drainage enhanced caprock disintegration and accelerated the break-off rates of caprock. During periods of most efficient cliff disintegration and boulder production the rates of escarpment retreat at the field site could have been two orders of magnitude higher than in the hyperarid areas. However, despite changing rates of retreat major processes involved in escarpment evolution seem to have remained the same.
英文关键词	Sandstone tableland Environmental change Escarpment retreat Boulders (10) Be exposure dating Sudetes
类型	Article
语种	英语
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:001259428400001
WOS关键词	TALUS FLATIRONS ; SCARP RETREAT ; COSMOGENIC NUCLIDES ; COLORADO PLATEAU ; STOLOWE MTS ; HALF-LIFE ; EVOLUTION ; BE-10 ; GEOMORPHOLOGY ; QUARTZ
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403945
推荐引用方式 GB/T 7714	Duszynski, Filip,Jancewicz, Kacper,Migon, Piotr,et al. Changing rates of escarpment retreat linked to environmental change in a sedimentary tableland, Stołowe Mountains, SW Poland[J],2024,461.
APA	Duszynski, Filip.,Jancewicz, Kacper.,Migon, Piotr.,Waroszewski, Jarosaw.,Christl, Marcus.,...&Egli, Markus.(2024).Changing rates of escarpment retreat linked to environmental change in a sedimentary tableland, Stołowe Mountains, SW Poland.GEOMORPHOLOGY,461.
MLA	Duszynski, Filip,et al."Changing rates of escarpment retreat linked to environmental change in a sedimentary tableland, Stołowe Mountains, SW Poland".GEOMORPHOLOGY 461(2024).