scholarly journals Petrographical Analysis of Warthian Fuvioglacial Gravels as a Tool to Trace the Source Area – A Case Study From Central Poland

Geologos ◽  
2014 ◽  
Vol 20 (3) ◽  
pp. 183-199
Author(s):  
Maria Górska-Zabielska ◽  
Lucyna Wachecka-Kotkowska
Keyword(s):  
Ice Sheet ◽  
Source Area ◽  
Crystalline Rocks ◽  
Coarse Grained ◽  
Source Areas ◽  
Central Poland ◽  
Lower Palaeozoic ◽  
The Baltic

Abstract The petrographical features of the medium- and coarse-grained gravels (4-10 mm and 20-60 mm, respectively) of weathered and fresh (unweathered) deposits indicate, in combination with so-called indicator and statistical erratics, that two glacial lobes joined in the borderland of the Polish Lowlands and Uplands. Lower Palaeozoic limestones become less frequent in the fner gravel fraction, whereas crystalline rocks and fints become more frequent. The petrographical analysis of the coarser gravel fraction indicates that the ice sheet advanced from the NE to NNW (the Widawka lobe) and from the NE to ENE (the Rawka, Pilica and Luciąża lobes). The source areas of the gravel deposited by the Warthian ice sheet were magmatic and sedimentary areas of both the Baltic and the SE Sweden basins.

scholarly journals STUDIUM SPODNOBADENSKÝCH BAZÁLNÍCH KLASTIK V OBLASTI PODZEMNÍHO ZÁSOBNÍKU PLYNU LOBODICE

2014 ◽  
Vol 21 (1-2) ◽  
Author(s):  
David Blaško ◽  
Slavomír Nehyba ◽  
Anita Bartakovics
Keyword(s):  
Depositional Environment ◽  
Sedimentary Rocks ◽  
Outer Part ◽  
Source Area ◽  
Crystalline Rocks ◽  
Source Material ◽  
Coarse Grained ◽  
Source Areas ◽  
Traction Current ◽  
Analysis Point

The depositional environment and the provenance of the Lower Badenian basal clastics in the area of Lobodice subsurface gas storage were described during the studies of these sediments.Drill cores of Lobodice wells were studied in the total length of 110 m for the purpose of depositional environment evaluation. The textures and structures were described on these cores and on this basis three lithofacies were recognized. The lithofacies A is represented by grey matrix supported, granule conglomerate, very poorly sorted. This lithofaces has been interpreted as the product of deposition of a coarse grained delta. The lithofacies B is formed by fine and medium sandstone with ripple cross lamination, very well sorted sandstone. This facies was interpreted as the result of a relatively low energy of traction current, probably deposited in marine environment. The lithofacies C is formed by greyish clay siltstone, locally with planar lamination and common bioturbation. The lithofacies C was interpreted as the product of deposition in the off shore condition (outer part of the shelf?).The results of pebble analysis and analysis of the chemistry of garnets and rutiles were used for the evaluation of the source areas of the Lower Badenian basal clastics.Pebble analysis shows that the studied Lower Badenian clastics are polymict. Grey limestones dominate in the pebble spectra and also oft en represent the largest clasts. Light-coloured limestones, shales and graywackes (most probably Culmian), quartzes and dolomites are relatively common. The content of pebbles of crystalline rocks is relative low. These results indicate the prevalence of sedimentary rocks in the source area and/or recycling of the source material. This results together with garnet and rutile analysis point to the source from the Culmian rock of Drahanská Vrchovina Upland and Nízký Jeseník Highland (especially the rocks of the Myslejovice Formation) and also probably from the Carpathian Flysch Belt.

scholarly journals Age and provenance of mica-schist pebbles from the Eocene conglomerates of the Tylicz and Krynica Zone (Magura Nappe, Outer Flysch Carpathians)

2016 ◽  
Vol 67 (3) ◽  
pp. 260-274 ◽  
Author(s):  
Nestor Oszczypko ◽  
Dorota Salata ◽  
Patrik Konečný
Keyword(s):  
Shallow Water ◽  
Age Distribution ◽  
Source Area ◽  
Crystalline Rocks ◽  
Mica Schist ◽  
Clastic Material ◽  
Monazite Dating ◽  
Source Areas ◽  
Flysch Carpathians ◽  
Pieniny Klippen Belt

Abstract During the Łate Cretaceous to Palaeogene, the Magura Basin was supplied by clastic material from source areas situated on the northern and southern margins of the basin, which do not outcrop on the surface at present. The northern source area is traditionally connected with the Silesian Ridge, whereas the position of the southern one is still under discussion. A source area situated SE of the Magura Basin supplied the Eocene pebbly para-conglomerates containing partly exotic material. The studied clastic material contains fragments of crystalline rocks, and frequent clasts of Mesozoic to Palaeogene deep and shallow-water limestones. Numerous mica schists, scarce volcanites and granitoids as well as gneisses, quartzites and cataclasites were found in the group of crystalline exotic pebbles. Monazite ages of “exotic” mica-schist pebbles from the Tylicz, Zarzecze and Piwniczna-Mniszek sections document the Variscan 310±10 Ma age of metamorphic processes. The provenance of these exotic rocks could be connected with a remote source area located SE of the Magura Basin, which could be the NW part of the Dacia Mega Unit. The idea is strongly supported by palaeotransport directions from the SE, the absence of material derived from the Pieniny Klippen Belt, the presence of shallow water limestones, typical facies of the Median Dacides belt and metamorphic age distribution proved by monazite dating.

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

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 762
Author(s):  
Maria Górska-Zabielska ◽  
Ewa Smolska ◽  
Lucyna Wachecka-Kotkowska
Keyword(s):  
Glacial Till ◽  
Eastern Area ◽  
Central Poland ◽  
Source Regions ◽  
Transport Direction ◽  
Petrographic Analyses ◽  
Glaciofluvial Deposits ◽  
Lower Palaeozoic ◽  
Facies Types

Abstract: 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.

A statistical technique for determining the source area of glacially transported granite erratics in the Queen Elizabeth Islands, Nunavut

2007 ◽  
Vol 44 (1) ◽  
pp. 43-59 ◽  
Author(s):  
Nigel Atkinson
Keyword(s):  
Ice Sheet ◽  
Source Area ◽  
Statistical Technique ◽  
Ellesmere Island ◽  
Laurentide Ice Sheet ◽  
Westward Expansion ◽  
Precambrian Shield ◽  
Source Areas ◽  
Compositional Group ◽  
Northward Expansion

This paper develops a technique that utilizes spatial and compositional trends in granite erratics distributed across the eastern and northwestern Queen Elizabeth Islands to discriminate between glacial dispersal trains originating from the Precambrian Shield of Ellesmere Island and the Canadian mainland. The distribution of glacially transported granite erratics in the eastern and northwestern Queen Elizabeth Islands defines a coherent pattern of regional dispersal from the Precambrian Shield of eastern Ellesmere Island. Principal components and cluster analyses demonstrate that most erratics within this dispersal train cluster within the same compositional group. Other members of this group represent outcrops on eastern Ellesmere Island, which define the locations of possible source areas. However, other compositional groups, which are unique to outcrops on the mainland, are absent from this dispersal train. Collectively, these spatial and compositional trends suggest that granite erratics on southwest Ellesmere, Amund Ringnes, and Meighen islands occur within a single dispersal train that resulted from the westward expansion of the Innuitian Ice Sheet from the Precambrian Shield of eastern Ellesmere Island. This technique may determine what differences, if any, exist among the composition of granite erratics deposited by the westward expansion of the Innuitian Ice Sheet across the Queen Elizabeth Islands and those deposited by the northward expansion of the Laurentide Ice Sheet. Any such differences may be useful in determining whether granite erratics of presently unknown provenance elsewhere in the Queen Elizabeth Islands are of Laurentide or Innuitian origin.

scholarly journals Structure of end moraines and dynamics of the recession phase of the Warta Stadial ice sheet, Kłodawa Upland, Central Poland

2020 ◽  
Vol 12 (1) ◽  
pp. 753-763
Author(s):  
Magdalena Anna Drążczyk
Keyword(s):  
Cross Sections ◽  
Ice Sheet ◽  
Geological Mapping ◽  
Dynamic State ◽  
Central Poland ◽  
The Creation ◽  
Key Sites ◽  
Marginal Zones

AbstractThe occurrence of end moraines reflects the dynamics of an ice sheet, and their inner structure is determined by processes taking place in marginal zones. In the southern part of the Kłodawa Upland of Central Poland, such moraines were formed, but opinions conflict as to their origin, including the influence of local transgression of the ice sheet, as well as its areal and frontal recession. The primary aim of this article is to analyse the inner structure of forms to define the dynamic state of the Warta Stadial ice sheet of the Odra Glaciation (Saalian). The conducted research includes fieldwork at four key sites, where lithofacial analysis was performed, as well as a geomorphological and geological mapping that included two cross-sections in greater detail. In exposures, the work focused on deformed structures of sediments. Description of key sites was extended by the creation and the analysis of general geological cross-sections. Considering the results of the research, the Kutno end moraines should not be classified as push moraines – they were revealed to be accumulative in character.

scholarly journals First principles characterisation of bio–nano interface

2021 ◽  
Author(s):  
Ian Rouse ◽  
David Power ◽  
Erik G. Brandt ◽  
Matthew Schneemilch ◽  
Konstantinos Kotsis ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
First Principles ◽  
Computational Approach ◽  
Titania Nanoparticles ◽  
Coarse Grained ◽  
First Principles Study

We present a multiscale computational approach for the first-principles study of bio-nano interactions. Using titanium dioxide as a case study, we evaluate the affinity of titania nanoparticles to water and biomolecules through atomistic and coarse-grained techniques.

Lack of ciliate community integrity in transitional waters: A case study from the Baltic Sea

2019 ◽  
Vol 226 ◽  
pp. 106259 ◽  
Author(s):  
Evelina Grinienė ◽  
Jūratė Lesutienė ◽  
Elena Gorokhova ◽  
Petras Zemlys ◽  
Zita R. Gasiūnaitė
Keyword(s):  
Baltic Sea ◽  
Transitional Waters ◽  
The Baltic Sea ◽  
Ciliate Community ◽  
The Baltic

scholarly journals Thermomechanical modelling of the Scandinavian ice sheet: implications for ice-stream formation

1999 ◽  
Vol 28 ◽  
pp. 83-89 ◽  
Author(s):  
A. J. Payne ◽  
D.J. Baldwin
Keyword(s):  
Three Dimensional ◽  
Ice Sheet ◽  
Ice Streams ◽  
Ice Flow ◽  
Low Viscosity ◽  
Ice Stream ◽  
Scandinavian Ice Sheet ◽  
The Baltic ◽  
Stream Formation ◽  
Initial Results

AbstractThis work attempts to explain the fan-like landform assemblages observed in satellite images of the area covered by the former Scandinavian ice sheet (SIS). These assemblages have been interpreted as evidence of large ice streams within the SIS. If this interpretation is correct, then it calls into doubt current theories on the formation of ice streams. These theories regard soft sediment and topographic troughs as being the key determinants of ice-stream location. Neither can be used to explain the existence of ice streams on the flat, hard-rock area of the Baltic Shield. Initial results from a three-dimensional, thermomechanical ice-sheet model indicate that interactions between ice flow, form and temperature can create patterns similar to those mentioned above. The model uses a realistic, 20 km resolution gridded topography and a simple parameterization of accumulation and ablation. It produces patterns of maximum ice-sheet extent, which are similar to those reconstructed from the area’s glacial geomorphology. Flow in the maximum, equilibrium ice sheet is dominated by wedges of warm, low-viscosity, fast-flowing ice. These are separated by areas of cold, slow-flowing ice. This patterning appears to develop spontaneously as the modelled ice sheet grows.

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