Figure 1. Major physiographic features and active plate boundaries of the Woodlark basin region. The stippled area encloses oceanic crust formed during the Brunhes Chron at spreading rates labeled in mm/yr. MT and ST = Moresby and Simbo transform faults, respectively; DE = D'Entrecasteaux islands. Top inset, geographical location of the Woodlark basin. Bottom inset, depth profile along the axis of the spreading center with the five spreading segments numbered.