Abstract
The application of methods frompalaeomagnetism and rock magnetism totectonic problems already has a longhistory of success. However, in recentyears there has been a growing awarenessof the remarkable potential of trulyintegrated studies performed in closecooperation by geophysicists and structuralgeologists. The scale of tectonic problemsencountered goes from planetary to metric,and now to microscopic. Most early studiesof deformed rocks used the classicalunfolding method of Graham [1949], in whichall rotations are assumed to be rigid bodyand around horizontal axes. Subsequently,more complicated cases of rigid rotationshave been envisioned [e.g., MacDonald,1980], and now problems involving multiplephases of folding and internal deformationare being tackled. The recognition of theimportance of remagnetizations hasperformed an important role in this evolution,with the advent of more sensitivemagnetometers and of more sophisticated means ofanalyzing demagnetization diagrams. Suchstudies are made even more powerful whencombined with age determinations, chemicaland petrographical analyses.
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