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Fig. 4


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Examples of lower crustal structures, Paleoproterozoic Finnish Svecofennides. (a) Schematic geological map showing traces of metamorphic foliations and some main shear zones (after Korsman et al., 1997). The regional pattern underlines bulk NNW-SSE shortening. Stereograms (lower hemisphere, equal angle) show examples of attitudes of the stretching lineations. These are subvertical within major shear zones and are scattered along belt strike outside them. NE-SW striking gently plunging lineations correspond to domains of gently dipping foliations. (b) Example of steeply dipping foliation bearing a steeply plunging lineation. (c) Example of domain of flat-lying fabric, with a small laccolith-type granitic intrusion (crosses) within flat-lying foliation. Modified after Cagnard et al., 2006a.

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