Abstract
Field data from a deformed clastic sedimentary series in northwestern Ontario disclose two directions of elongation-one indicated by the folding; the second, by the parallelism of linear elements, such as conglomerate boulders and individual mineral grains, to the fold axes. These two directions of elongation are normal to each other and are unequally developed, the major one being parallel to the linear elements and to the axial lines of the folds. A hypothesis recently outlined by Sander best explains this dual elongation. It postulates a shear couple essentially normal to the axial lines of the folds, combined with intergranular rotational movements. The intermediate axis of strain (B) is parallel to the fold axes and to the linear elements and is unique in that it is a minor axis of elongation (for triaxial deformation) and also an axis of rotation. This results in the effective elongation of the structure being parallel to B, while elongation parallel to A (the long axis of strain) is retarded in its...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
