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

Woźniak, Piotr Paweł; Sokolowski, Robert; Czubla, Piotr; Fedorowicz, Stanisław

doi:10.2478/squa-2018-0002

Cited by 9 publications

(9 citation statements)

References 24 publications

(31 reference statements)

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“…Gross (1933Gross ( , 1942, likewise, stated that the rocks of the Old Red Sandstone in which he and Kade found scales of Porolepis posnaniensis had to be transported from the area of Estonia. This agrees with the putative transport direction of the ice flow from a northeastern source area that comprises the region between St. Petersburg and northern Lithuania (Wozńiak et al, 2018). Well-preserved vertebrate material has been described from Latvia (e.g., Hajłasz, 1974;Märss, 1986;Bjerkéus, 2001), which probably was the source area for boulders that occur in postglacial material in Poland.…”

Section: Geological Settingsupporting

confidence: 79%

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Comments on the Squamation of Polish Lower Devonian Porolepiforms

Wilk

Szrek

Dec

et al. 2019

Journal of Vertebrate Paleontology

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Porolepiform scales from the Lower Devonian of the Holy Cross Mountains, Poland, described from the 'placoderm sandstone' of the Daleszyce area, are revised. The aim of the present article is to organize the recently collected, but not formally described, porolepiform material from the Holy Cross Mountains, as well as specimens from erratic boulders collected near Gdynia (northernmost Poland), which can be referred to Porolepis. Previously collected and new material was found to contain at least two sarcopterygian taxa: Porolepis and Heimenia. Based on morphological and histological features, the described material has been divided into two scale assemblages. The first, which is assigned to Porolepis, possesses cosmine cover on the entire exposed area; in the second, assigned to Heimenia, the cosmine cover is reduced or absent. These features prove to be stable regardless of the position of the scale on the body and thus are taxonomically informative.

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Section: Geological Settingsupporting

confidence: 79%

“…These boulders were reworked by recent sea-wave activity; therefore, the exact position in the profile is difficult to determine. However, the occurrence of the 'Old Red Sandstone' erratics within the 0-4 unit was noted by Wozńiak et al (2018), who identified the potential source area as Lithuania (Wozńiak et al, 2018:fig. 4c).…”

Section: Geological Settingmentioning

confidence: 99%

Comments on the Squamation of Polish Lower Devonian Porolepiforms

Wilk

Szrek

Dec

et al. 2019

Journal of Vertebrate Paleontology

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“…There are two main lithostratigraphic units in the research area. The older unit is composed of fine sands, silts, and lignite of the Neogene (Pikies 2001;Pikies andZaleszkiewicz 2004, 2013a, b;Woźniak et al 2018). These deposits are only exposed in cliffs.…”

Section: Study Areamentioning

confidence: 99%

“…These deposits are only exposed in cliffs. The younger unit consists of glacial tills, fluvioglacial sands, and gravels, along with limnoglacial silts and clays of Pleistocene as well as Holocene fluvial sands, muds, and peat (Pikies 2001;Pikies andZaleszkiewicz 2004, 2013a, b;Woźniak et al 2009Woźniak et al , 2018Woźniak and Czubla 2016). Holocene alluvial and colluvial deposits occur along the valley bottoms.…”

Section: Study Areamentioning

confidence: 99%

Landslide susceptibility mapping of Gdynia using geographic information system-based statistical models

Małka

2021

Nat Hazards

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This work aims to prepare a reliable landslide susceptibility model and to analyse the factors contributing to landslides in a dynamic environment by considering the city of Gdynia, Poland as a case study. Geological, geomorphological, hydrological, hydrogeological, and anthropogenic predisposing factors are considered using geographic information systems. Ground types at different depths (1 m and 4 m b.g.l.) are used in the statistical susceptibility assessment for the first time. Landslide susceptibility maps are developed using two techniques in presenting landslides, 13 conditioning factors, and three statistical methods: landslide index, weight of evidence, and logistic regression. The considered factors have an influence on mass movement formation, but their roles are different. Many of these passive factors are interrelated and some of them are also related to active factors, i.e. triggers. Consideration of many thematic layers in the statistical approach allows for the selection of the most appropriate geo-environmental variables. The most significant conditioning factors that affect the likelihood of landsliding include land use and land cover as well as topography. The susceptibility maps generated by the index model and many interrelated passive factors appear to be over-predicted. The logistic regression model and only independent controlling factors (slope angle, slope aspect, and lithology) are sufficient to compile a reliable susceptibility map of Gdynia. Prediction rate curve plots show that the susceptibility map produced using logistic regression exhibits the highest prediction accuracy. The results emphasize the need to check independence in the selection of instability factors and the use of an independent subset of landslides for validation.

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“…In Europe, both the last and earlier Pleistocene glaciations have been studied in this regard [10,16,[25][26][27][28][29][30][31]. Indicator and auxiliary erratics found in Poland have also been described, and their source areas have been identified [29,[32][33][34][35][36][37][38]. Recently, research has focused on the Middle Polish Glaciation-Odranian/Wartanian (Saalian, Marine Oxygen-Isotope Stage (MIS) 6) [33, [39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Transport Direction and Scandinavian Source Regions of the Saalian Glacial and Glaciofluvial Deposits in a Case Study of Łubienica-Superunki (Central Poland)

2021

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The article contains detailed petrographic studies, which covered a coarse and medium-grain gravel fraction of two layers of glacial till (units ŁS II and ŁS IV) and two layers of sand-gravelly outwash deposits (units ŁS I and ŁS III) related to the Odranian Glaciation (MIS6, Saalian) in Łubienica-Superunki, North Mazovian Lowland, central Poland. Additionally, the indicator erratics were identified to indicate their Scandinavian source areas and the directions of the ice sheet transgressions. This case study is discussed against the background of similar sediments and forms from the same age but from other places in the Polish Lowlands. Regardless of the facies types and fractions, crystalline rocks dominated over all other petrographic groups in all samples. The most common were the indicator erratics derived from the Åland Islands, followed by those from the south-eastern area of Sweden (Småland) and from Dalarna in central Sweden. Amongst the erratics of limited indicative significance, the most common were Lower Palaeozoic limestones and the Jotnian red sandstones. The complex petrographic analyses point to the dipartite nature of the studied profile. This separateness was confirmed by the TBC: 59.1–59.2° N and 18.0–18.2° E for the lower units and 58.8–59.4° N and 17.3–17.9° E for the upper ones.

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

Cited by 9 publications

References 24 publications

Comments on the Squamation of Polish Lower Devonian Porolepiforms

Comments on the Squamation of Polish Lower Devonian Porolepiforms

Landslide susceptibility mapping of Gdynia using geographic information system-based statistical models

Transport Direction and Scandinavian Source Regions of the Saalian Glacial and Glaciofluvial Deposits in a Case Study of Łubienica-Superunki (Central Poland)

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