Abstract: The growth of normal faults in mechanically layered sequences is numerically modelled using three-dimensional Distinct Element Method (DEM) models, in which rock comprises an assemblage of bonded spherical particles. Faulting is induced by movement on a pre-defined normal fault at the model base whilst a constant confining pressure is maintained by applying forces to particles lying at the model top. The structure of the modelled fault zones and its dependency on confining pressure, sequence (net:gross) and fault obliquity are assessed using various new techniques that allow (a) visualization of faulted horizons, (b) quantification of throw partitioning and (c) determination of the fault zone throw beyond which theoretical juxtaposition sealing occurs along the entire zone length. The results indicate that fault zones become better localized with increasing throw and confinement. The mechanical stratigraphy has a profound impact on fault zone structure and localization: both low and high net:gross sequences lead to wide and relatively poorly localized faults. Fault strands developing above oblique-slip normal faults form, on average, normal to the greatest infinitesimal stretching direction in transtensional zones. The model results are consistent with field observations and results from physical experiments.

Abstract Arthur Smith Woodward was the Natural History Museum’s longest-serving Keeper of Geology and the world’s leading expert on fossil fish. He was also an unwitting victim of the Piltdown fraud, which overshadowed his important scientific contributions. The aim of this book is to honour Smith Woodward’s contributions to vertebrate palaeontology, discuss their relevance today and provide insights into the factors that made him such an eminent scientist. The last few years have seen a resurgence in fossil vertebrate (particularly fish) palaeontology, including new techniques for the ‘virtual’ study of fossils (synchrotron and micro CT-scanning) and new research foci, such as ‘Evo-Devo’ – combining fossils with the development of living animals. This new research is built on a strong foundation, like that provided by Smith Woodward’s work. This collection of papers, authored by some of the leading experts in their fields, covers the many facets of Smith Woodward’s life, legacy and career. It will be a benchmark for studies on one of the leading vertebrate palaeontologists of his generation.