Stratigraphic Position of Tills in the Orłowo Cliff Section (Northern Poland): A New Approach

IF 0.6 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Studia Quaternaria Pub Date : 2018-06-01 DOI:10.2478/squa-2018-0002

P. Woźniak, R. Sokołowski, Piotr Czubla, Stanisław Fedorowicz

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引用次数: 11

Abstract

Abstract The site at Orłowo Cliff was used to analyse the stratigraphic position and palaeogeographic interpretations of the properties and depositional conditions of two basal tills from the Late Pleistocene. A multi-proxy approach involved lithofacies, petrographic analysis of the fine gravel fraction, analyses of indicator erratics and till fabric. TL dating of intra-moraine deposits was used to determine depositional time frames of tills. The sediment profile at Orłowo Cliff shows a distinct reduction in number of Pleistocene units. Obtained dating results suggest the presence of Middle and Late Pleistocene fluvial units. The main issue discussed is the stratigraphic position of the older till (Unit O-4). It can be assumed that this till was deposited probably during the Middle Weichselian (MIS4). At Orłowo Horn the till of Unit O-4 reveals incorporation of the erratic material derived from an older till in the surrounded area (according to petrographic composition - probably from MIS 8). The younger till (Unit O-6) was deposited in the Late Weichselian (MIS 2). Moreover, the till of Unit O-6 is characterised by a significant shift towards the south-west in terms of the erratic origin in Unit O-4.

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波兰北部Orłowo断崖剖面斜坡地层位置的新探讨

摘要奥沃崖遗址用于分析晚更新世两个基丘的地层位置和古地理特征及沉积条件。一种多代理方法涉及岩相、细砾石组分的岩相分析、指示误差分析和泥质组构分析。冰碛内沉积物的TL测年用于确定tills的沉积时间框架。Orłowo悬崖的沉积物剖面显示更新世单元数量明显减少。测年结果表明存在中更新世和晚更新世的河流单元。讨论的主要问题是老til（单元O-4）的地层位置。可以推测，该矿床可能是在中魏氏时代（MIS4）沉积的。在Orłowo Horn，O-4单元的收银台显示，周围地区的旧收银台中含有不稳定的物质（根据岩相组成，可能来自MIS 8）。晚稻（O-6单元）沉积于晚魏克塞尔阶（MIS 2）。此外，就O-4单元的不稳定起源而言，O-6单元的收银台的特征是向西南方向显著移动。

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来源期刊

Studia Quaternaria GEOSCIENCES, MULTIDISCIPLINARY-

CiteScore

1.40

自引率

0.00%

发文量

期刊介绍： Studia Quaternaria is designed to publish scientific works concerning the Quaternary, on local, regional and global scale. Studia Quaternaria is interested in all fields of research dealing with stratigraphy and reconstruction of the past environments, including palaeogeography, palaeoecology, palaeoclimatology, palaeohydrology etc. The journal is also open to studies of natural environmental processes, and to recognition of mechanisms involved in the dynamics of our environment. The clue is that the Quaternary is still ongoing and vivid, and understanding of its past and present development support each other.