Subglacial erosion, deposition and deformation associated with deformable beds
There is an inter-relationship among subglacial deformation, deposition and erosion associated with a glacier moving over a deformable bed. It is suggested that the best evidence for net subglacial deforming bed erosional conditions are drumlins
. Changes in subglacial hydrology are also discussed, and the relationship of eskers and tunnel valleys to deforming bed conditions. Sedimentary techniques to identify homogeneous deforming bed tills in the field are also suggested. Finally the extent
and style of deforming bed conditions that existed during the glaciations of Britain and Ireland are discussed.
An hypothesis from which a general principle covering deformation of alluvial boundaries may be developed is proposed, namely flow of fluid past a deformable boundary will deform the boundary so as to increase the resistance to flow. Upon attainment
Styles of subglacial glaciotectonic deformation within the context of the Anglian ice-sheet
By using glaciological and geotechnical theory, the AA. show that the expression of these deformational styles in East Anglia is a natural response to the stress fields imposed by the ice-sheet, and that in consequence their spatial relationships
are explicable. The depth of deformation is related to the geotechnical properties of till and substrate, the stress and effective stress fields, and found to be consistent with observations.
On distribution of slope deformations in the north-eastern part of the Vizovická vrchovina Highland in Eastern Moravia
Altogether ninety-three localities of slope deformation were identified in the NE parts of the Vizovice Highland, during the detailed geomorphological mapping. Special attention was paid to the deep-seated slope deformations in the central
The theoretical basis for and a model of the origin of glacio-tectonic deformations
This paper contains theoretical considerations concerning the causes and location of the formation of glaciotectonic deformations by inland ice in the substratum. These considerations are based on a theory of rock and soil mechanics as well
as on the results of investigations into various types of glaciotectonic structures. Glaciotectonic deformations are a result of the operation of the same stress system that causes the phenomenon of glacioisostasy. Five generations of glaciotectonic structures
Genesis of deformation structures affecting Plio-Pleistocene sediments in the western Portuguese mainland (West Iberia). Implication on the regional neotectonics
In this study area, the genesis of the deformation is evaluated from the analysis of the geologic setting, the stratigraphic distribution and the depositional conditions of the deformed sediments, coupled with the geometry and kinematics
of the outcropping structures. The neotectonic activity is therefore reconsidered from the interpretation of the triggering mechanisms responsible for the observed deformation.
The A. starts with the question of deforming beds. The recognition that subglacial till deformation can contribute to glacier characteristics has been one of the key conceptual developments of the last decade in glaciology. Many of the issues
discussed in recent literature in the context of the deforming-bed model have been discussed in earlier literature in the context of the basal ice layer. The potential value of basal-ice work is enormous.
Modes of propagation of the compressional deformation in the Umbria-Marche Apennines
Overprinting relationship among major and minor structures in the sedimentary cover of south-eastern Umbria and northern Latium provide significant information on the modes of compressional deformation propagation in the Umbria-Marche Apennines
Internal deformation of a fast-moving earthflow, Raukumara Peninsula, New Zealand
This paper presents measurements of internal deformation made over a two-year periode using electrolytic tiltmeters, with a sensitivity of 2-4 min of arc, installed in the fast-moving Wether Run earthflow complex on the Raukumara Peninsula, New
Deformational structures in the first Salpausseklä end moraine, Joutsenonkangas, South-eastern Finland
Deformational structures in glaciofluvial deltaic sand of the First Salpausselkä end moraine have been described and their origin interpreted on the basis of the palaeogeographical setting of the site. The structures, including a load wedge, formed
Alpine structure and deformation chronology at the Southern Alps-Po Plain boder in Lombardy
A review of the structural grain of Southern Alps in Lombardy is integrated in this paper with new subsurface data, in order to contribute to detailed reconstruction of the chronology of Alpine deformation of the South Alpine chain and foreland
Deformation-induced microstructures in soils affected by mass movements
The soil deformation produced by mass movements gives rise to specific microscopic features. The study of some markers of deformation, such as the orientation of rigid clasts and the morphology of fine-grained intercalations, indicates that,in most
The coseismic and postseismic deformation of the L’Aquila, 2009 earthquake from repeated GPS measurements
deformation field. In the months following the main shock, an extensive GPS survey was carried out on the existing Central Apennines Geodetic Network (CAGeoNet), with the intention of collecting a robust data set and to study the co- and postseismic
deformation field of this Apenninic normal faulting earthquake. - (NF)
A gravel outwash/deformation till continuum, Skalafellsjokull, Iceland
A stratigraphic sequence exposed by river erosion in the foreland of Skalafellsjokull, southern Iceland, displays 5 lithofacies documenting glaciofluvial deposition followed by glaciotectonic disturbance and subglacial deformation. The whole
sequence comprising lithofacies 2-5 represents a gravel outwash/deformation till continuul displaying variable strain signatures produced in response to stress induced by the overriding of Skalafellsjokull during the Little Ice Age.
Borehole deformation measurements and internal structure of some rock glaciers in Switzerland
Vertical and horizontal borehole deformations have been measured in 3 rock glaciers in Switzerland. The results are compared in this paper. In addition, the results of 2 recent drilling campaigns, one on the Muragl and one on the Murtèl-Corvatsch
Active deformation of the continental margin along the Nankai and Suruga Troughs, Southwest Japan
as tectonic deformations of the continental margin through the Quaternary up to the present. The continental slope facing the Nankai and Suruga Troughs is highly deformed and more active than the oceanic trench itself.