MANIFESTATIONS OF STRUCTURAL CONTROL OF LANDFORMS IN METAMORPHIC ROCKS

Landforms showing a remarkable adaptation to the strike and dip of the foliation or exfoliation planes of metamorphic rocks were identified from structure measurements in the Bohemian massif at the eastern marg in of the Moldanubian complex and the adjoining micaschist series. The re are small exfoliation domes resembling ice-scoured roches moutonees in the granulite gneiss near Nova Ves as well as homoclinal crests in the biotite paragneiss at the contact of the Moravian complex with th e micaschist series west of Oslavany, where even the drainage pattern is partly adjusted to these structures. To my knowledge such structura lly determined micro- and mesoforms in metamorphic rocks of identical orientation have not been described yet. The fact that these landforms have been identified at the eastern margin of the Bohemian massif cal ls for devoting much more attention to the mutual relationships betwee n Iandform elements and elements of passive morphostructure in the sen se of GERASTMOV (1946).