[1] Sandbox models of accretionary wedges have demonstrated that fault systems grow episodically via cycles of alternating wedge thickening, which is accommodated by slip along faults within the wedge (underthrusting), and wedge lengthening, which is accommodated by growth of new faults at the wedge toe (accretion). The transition between these two modes of deformation is controlled by the inte...

[1] Integrated Ocean Drilling Program Expedition 315 recovered cores from accretionary units, which are overlain by cover sequences, at a site on the hanging wall of the mega‐splay fault (C0001), and at a seaward margin of a forearc basin (C0002) in Nankai Trough off Kumano, Japan. In order to investigate the amount and the style of deformation and shortening direction of the accretionary prism...

Integration of geological and geophysical data from the active Banda orogen reveals important variations in structural style with time that reconcile rival hypotheses for the tectonic evolution of the Banda arc. These variations indicate the temporal distribution of strain in the collision zone by vertical and horizontal structural restorations of the collision through time. In the western part...

Following IODP Expedition 333, frontal ramps of submarine landslides were investigated together with a submarine channel-gully system. In this presentation they are shown to reflect thrust-fault activity in the Nankai accretionary wedge, prior to one of the major stages of movement of the large megasplay fault (MSF). Variations in channel bed slope, height and width of channels and gullies indi...

[1] Many important insights regarding the coupling among climate, erosion, and tectonics have come from numerical simulations using coupled tectonic and surface process models. However, analyses to date have left the strength of the coupling between climate and tectonics uncertain and many questions unanswered. We present an approximate analytical solution for two-sided orogenic wedges obeying ...

Geodetic studies of subduction megathrusts have shown that the pattern of interseismic strain is heterogeneous, varying between locked seismic and creeping aseismic sections. Paleoseismology reveals that large earthquakes have occurred repeatedly on the same section, implying that variability in interface frictional properties are long-term features. Based on stick-slip frictional laws this in ...

A simple formulation for the growth of a wedge of constant taper accreting a sediment layer of given thickness and exponential decrease of porosity with depth was used to estimate the rates of growth of the accretionary wedges off Vancouver Island and Oregon. Application to the section off Vancouver Island indicates that the accreted sediments penetrated at Site 889 were added to the toe of the...