静岡県三保半島の「瀬織戸の渡し」に関する地質学的調査

抄録

Historical documents show that the Miho Peninsula was separated from the land by a narrow channel, called the “Seorido no Watashi” (in Japanese: Seorido = local name, no = of, Watashi = passage). This passage may have been formed by partial destruction by tsunami. In the present study, we conducted a geological survey using two sediment cores (10–11 m in length) near the ancient passage in order to investigate the age and formation process of the passage. The cored sediments were mainly composed of sand and gravel deposited on the shore of the peninsula and did not contain any materials available for ¹⁴C dating. These results did not provide any evidence of the process or timing of channel formation.