Das Sockelstockwerk in den Randzonen der Urkontinente |
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| Authors: | Prof Dr Ernst H Ackermann |
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| Institution: | 1. Geologisch-Pal?ontologisches Institut der Universit?t, Berliner Str. 28, G?ttingen
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| Abstract: | The rocks of the cratonic foreland extend underneath many orogens, where they are subjected to “regeneration” during the geosynclinal phase and to superimposed structures during the folding of the orogen. Such structural and metamorphic alterations are now exposed in the “Sockelstockwerk” of certain orogenic belts in Africa, America, Australia and Europe. In this deep level, originally situated between the bottom of the geosyncline and the migmatite stockwerk, the following zones have been observed along the total length of the orogenic belt: border zone along the margin of the cratonic foreland: broad belt with superimposed structures of two (ore more) different orogenic deformations; main vergency fan, marking the central axis of the orogen. This fan often is a lineament with deep roots and a structure of continental importance. |
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