The Mid-Pleistocene marker-tephras in the southern central parts of Miyagi Prefecture, northeastern Japan

Describes the characteristics of the five marker-tephras in the tephra sequence overlain by the Medeshima Pumice layer and the relationships between the markers and the geomorphic surfaces in the area to the south of Sendai. The relationships between the marker-tephras and geomorphic surfaces make clear that the Aobayama surfaces are divided at least into the following two groups of different ages: the Aobayama I and II surfaces and the Aobayama III and IV surfaces, and that the hill-top surfaces of the Motoisago Hills and the Medeshima Hills are older than the Aobayama surfaces. -from English summary