1. GIS analysis of geomorphological and geological data
These analysis are based on the digital elevation data and digitized geological data and other information related to the study area:
- digital elevation model based on topographic maps at the scale 1:50 000 (model DTED 2) for the general geomorphological analysis of the study area,
- high-resolution photogrammetricdigital elevation model for detailed geomorphological analysis of the study area and recognition of characteristic landforms morphology,
- rectified topographic maps at scales 1:50 000, 1:25 000 and 1:10 000 to verify the accuracy of digital elevation model and for the topographic background,
- detailed hydrographical network of the study area digitized from hydrographical maps at 1:50 000 scale to support the geomorphological analysis (flow directions, etc.),
- digitized geological maps at the scale 1:50 000 and superficial deposits sketches at smaller scales to determine the spatial distribution of sediments related to different depositional environments,
- borehole database (Hydro database, boreholes from geological maps and other archive boreholes) for the reconstruction of the paleotopography on which the last Scandinavian Ice Sheet has been advancing.
Collected digital elevation and geological data are used to geospatial analysis of geomorphological and
sedimentological signatures of the last Scandinavia Ice Sheet dynamics within study area.
2. Sedimentological studies
Sedimentological studies include both fieldworks and laboratory works. These research are taken at four key sites and eight complementary sites. Large extend of selected key sites and the occurrence of glacial tills within these sites is crucial for the reconstruction of the last Scandinavian Ice Sheet dynamics. Therefore, the entire set of fieldworks including sediments sampling for the laboratory analysis are taken at key sites. At complementary sites only selected fieldworks such as general lithofacial description and measurements of a directional features are taken.
Fieldworks include:
- identification of the sediments related to the last glaciation and their direct substratum, detailed analysis of the sedimentary, erosional and deformational features of the sediments and their contacts with the substratum (sedimentary structures, glaciotectonic deformations, synsedimentary deformations, erosional features, etc.),
- measurements of the directional features within the sediments at the macroscopic scale (e.g. till macrofabric, paleocurrents directions, vergence of deformational structures, ploughing marks, striations on the clasts surfaces, etc.),
- sediments sampling for the laboratory analysis.
Laboratory analysis include:
- grain size analysis with application of standard sieve methods for fraction > 0,1 mm, as well as laser analysis for fraction < 0,1 mm,
- analysis of the quartz grains (0,8-1,0 mm) roundness with application Cailleux method in the modification of Mycielska-Dowgiallo & Woronko (1998),
- determination of the fine gravels (5-10 mm) petrographic composition (Rzechowski 1971),
- the anisotropy of magnetic susceptibility (AMS) measurements in glacial till samples - these analysis allow to determine the orientation of clay- and silt-size elongated particles within glacial till – magnetic fabric (Hooyer et al. 2008, Iverson et al. 2008, Shumway & Iverson 2009); results are important in terms of glacial till origin and reconstruction of ice movement directions within study area; samples will be taken from till layers within key sites; AMS measurements results are complementary for till macrofabric measurements,
- ring-shear experiments (Iverson et al. 1997) of a basal till samples – these experiments results in
quantification of the parameters (e.g. normal stress, shear stress) which are responsible for deformation
of the sediments; results will be used to estimation of the conditions in which subglacial deformation
occur.
3. OSL dating of outwash sediments
Samples from sandy sediments exposed at three key sites (Samplawa, Glaznoty and Rudno) will be taken. Undeformed sand deposit layers located below or between till beds will be sampling for OSL dating. These analysis will be done in the Gliwice Absolute Dating Methods Centre at Silesian University of Technology, Gliwice and in laboratory at Sheffield University, UK.
These analysis are based on the digital elevation data and digitized geological data and other information related to the study area:
- digital elevation model based on topographic maps at the scale 1:50 000 (model DTED 2) for the general geomorphological analysis of the study area,
- high-resolution photogrammetricdigital elevation model for detailed geomorphological analysis of the study area and recognition of characteristic landforms morphology,
- rectified topographic maps at scales 1:50 000, 1:25 000 and 1:10 000 to verify the accuracy of digital elevation model and for the topographic background,
- detailed hydrographical network of the study area digitized from hydrographical maps at 1:50 000 scale to support the geomorphological analysis (flow directions, etc.),
- digitized geological maps at the scale 1:50 000 and superficial deposits sketches at smaller scales to determine the spatial distribution of sediments related to different depositional environments,
- borehole database (Hydro database, boreholes from geological maps and other archive boreholes) for the reconstruction of the paleotopography on which the last Scandinavian Ice Sheet has been advancing.
Collected digital elevation and geological data are used to geospatial analysis of geomorphological and
sedimentological signatures of the last Scandinavia Ice Sheet dynamics within study area.
2. Sedimentological studies
Sedimentological studies include both fieldworks and laboratory works. These research are taken at four key sites and eight complementary sites. Large extend of selected key sites and the occurrence of glacial tills within these sites is crucial for the reconstruction of the last Scandinavian Ice Sheet dynamics. Therefore, the entire set of fieldworks including sediments sampling for the laboratory analysis are taken at key sites. At complementary sites only selected fieldworks such as general lithofacial description and measurements of a directional features are taken.
Fieldworks include:
- identification of the sediments related to the last glaciation and their direct substratum, detailed analysis of the sedimentary, erosional and deformational features of the sediments and their contacts with the substratum (sedimentary structures, glaciotectonic deformations, synsedimentary deformations, erosional features, etc.),
- measurements of the directional features within the sediments at the macroscopic scale (e.g. till macrofabric, paleocurrents directions, vergence of deformational structures, ploughing marks, striations on the clasts surfaces, etc.),
- sediments sampling for the laboratory analysis.
Laboratory analysis include:
- grain size analysis with application of standard sieve methods for fraction > 0,1 mm, as well as laser analysis for fraction < 0,1 mm,
- analysis of the quartz grains (0,8-1,0 mm) roundness with application Cailleux method in the modification of Mycielska-Dowgiallo & Woronko (1998),
- determination of the fine gravels (5-10 mm) petrographic composition (Rzechowski 1971),
- the anisotropy of magnetic susceptibility (AMS) measurements in glacial till samples - these analysis allow to determine the orientation of clay- and silt-size elongated particles within glacial till – magnetic fabric (Hooyer et al. 2008, Iverson et al. 2008, Shumway & Iverson 2009); results are important in terms of glacial till origin and reconstruction of ice movement directions within study area; samples will be taken from till layers within key sites; AMS measurements results are complementary for till macrofabric measurements,
- ring-shear experiments (Iverson et al. 1997) of a basal till samples – these experiments results in
quantification of the parameters (e.g. normal stress, shear stress) which are responsible for deformation
of the sediments; results will be used to estimation of the conditions in which subglacial deformation
occur.
3. OSL dating of outwash sediments
Samples from sandy sediments exposed at three key sites (Samplawa, Glaznoty and Rudno) will be taken. Undeformed sand deposit layers located below or between till beds will be sampling for OSL dating. These analysis will be done in the Gliwice Absolute Dating Methods Centre at Silesian University of Technology, Gliwice and in laboratory at Sheffield University, UK.
National
Science
Centre
Science
Centre
Nicolaus
Copernicus
University
Copernicus
University
Faculty of Earth Sciences
Last update: October 2014