Record details

    Geometry of fold arrays in the Silesian-Cracovian region of southern Poland
Statement of responsibility
    Leslaw Teper
Other titles
    Forces Folds and Fractures (Variant.)
    Teper, Leslaw
Source title - serial
    Geological society special publication
    Vol. 169
    p. 167-179
    14 obr., 2 s.bibl.
    Zkr. název ser.: Geol. Soc. spec. Publ. (London).
Subject group
    anomálie tíhová
    hornoslezská pánev
    mapa strukturní
    uhelná sloj
    uhelný revír
    vrásnění variské
    zóna střižná
Geographical name
Abstract (in english)
   A zone of deformation characterized by en echelon folds extends along the northeast margin of the Upper Silesian Coal basin in southern Poland. The zone is well exposed by mining in numerous colliers where the deformation involving Uppe Carboniferous strata can be observed. Folds and associated faults form a structural pattern consistent with an origin in dextral convergent wrenching on both the principal deep-seated fractures and the subsidiary faults affecting crystalline basement beneath this part of the basin. The zone is cross-cut by subblatitudinal fold belts which, according to their geometrical parameters, seem to result from alternate transcurrent shearing along west-east oriented fractures in the basement, sinistral in one case and dextral in the other.
   Among folds caused by the coficentrated operation of a force couple whose vectros lie in the horizontal plane, there are examples of bending folds (forced folds) in each array resulting from vertical components of movement of deep-seated fault blocks. The dimensions of the folds change with depth, and the axial trend and the inclination of axial surfaces differ with distance from the basement fault trace. The length of fold segments strongly depends on axes orientation. Widely distributed evidence of interlayer slip demonstrates a variable spatial distribution of tectonic-transport direction in the sedimentary sequence
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    25. 3. 2008
Import date
    8. 8. 2012