Abstract
The offshore sedimentary basin of northeastern Honshu is occupied by the sedimentary rocks of Cretaceous, Paleogene and Neogene age.
The Cretaceous sedimentary basin is inferred to develop beyond the continental margin.
The Paleogene and early Miocene sediments distribute in nearshore and continental shelf area.
Late Miocene sediments uncoformably cover the pre-late Mioocene sequences. The sediments of presumed Pliocene age onlap late Miocene sediments.
