sentences:  Lavas and volcaniclastics associated with an intense episode of intraplate volcanism correspond in time closely to the Cretaceous Superchron.Off-ridge volcanism became increasingly important approaching the Ontong-Java Plateau.There are 100–400 m thick tholeiitic sills in the East Mariana Basin and Pigafetta Basin , and at least 650 m of tholeiitic flows and sills in the Nauru Basin, near ODP Site 462. suggest that this province may reflect the formation of a mid-Cretaceous spreading system in the Nauru and East Mariana basins.