Isotopic investigations for the origin of relic from the Matsusaki site, Japan

We measured the environmental radioactivity and isotope ratio, 87Sr/86Sr ratio, 234U/238U, δ13C, and 228Ra/226Ra activity ratio, of adhesion that adhered to a wooden tubing vessel obtained from the Matsusaki site, one of the salt-production sites where Moshio is manufactured, in Aichi Prefecture, Japan. The environmental radioactivity and isotope ratio verified that the adhesion originated from the seaweed and/or sea grass.