Outlines criteria for interpreting the stratigraphy and structure of regionally metamorphosed terrain, citing examples from various crystalline complexes of France. Parametamorphic rocks exhibit a regular sequence, whereas injection gneisses and migmatites do not, because of the irregularity of the magmatic activity involved in their formation. Granites of deep-seated origin are always accompanied by migmatites, but never by a microgranitic aureole. Interpretation of the effects of orogenic activity or deformation is based on analysis of axial orientations, the grade of metamorphism, and microstructures.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.