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The AAPG/Datapages Combined Publications Database

CSPG Bulletin


Bulletin of Canadian Petroleum Geology
Vol. 12 (1964), No. 2. (June), Pages 279-310

Interference Patterns from Inclined Shear Fold Systems

E. S. O'Driscoll


In a previous paper (O'Driscoll, 1962a) the writer has described interference patterns resulting from the superposition of shear folds in which axial Previous HitplanesNext Hit and shear movements were vertical. This sequel describes laminar models used for the presentation of cross fold patterns resulting from the interference of intersecting shear fold systems which have inclined axial Previous HitplanesTop. Rectangular and oblique intersections are considered and shown by means of a specially developed type of pre-printed contoured model in which the surface interference relief is automatically outlined. Both cummutative and non-commutative cross fold deformations are described, as well as the simple shear transformations of idealised shapes elected to represent geological structures on large and small scales.

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