Current research in sedimentary geology/sequence stratigraphy and tectonics is aimed at such varied topics as how sedimentation responds to sea-level change, deformation and other phenomena; mechanisms of crustal extension, with particular reference to the low-angle normal fault paradox; and the geology of the Neoproterozoic Era, an interval of time that is unusual for its climatic extremes and as a threshold in the history of life. Much of the work is collaborative, with emphasis on challenging conventional thinking and resolving outstanding disagreements.