Abstract
The thick marine deposits of the Pliocene and Pleistocene are continuously developed in the Boso Peninsula. The lower part of them is a well-known gas-producing horizon. The Pleistocene succession of the Miura Peninsula intercalates non-marine sediments, accompanied with the unconformities, and it shows the advance and retreat of the sea. Therefore, the detailed time-stratigraphic correlation between the standard successions of two peninsulas is very important for the natural gas exploration and for the Quaternary geology of this region. The present attempt is made on the basis of the re-examination of the foraminifera fossil assemblages and lithostratigraphy.
