Mesozoic floral succession of Nagato mountainland, western Japan

Abstract

Floral succession in Triassic and Jurassic formations of Nagato mountainland, western Japan were carried out by the author and determined the stratigraphical boundary between the horizons of Dictyophyllum Series and Onychiopsis Series of Oishi exists at some limited horizon between the uppermost of Higashi-Nagano formation and the middle of Nishi-Nakayama formation of the Toyora Group.