- Bulletin of the National Science Museum. Series C, Geology & paleontology (ISSN:0385244X)
- vol.11, no.1, pp.9-36, 1985-03
This paper describes some imprints on the surface of a cliff of the Lower Cretaceous Sebayashi Formation at Sebayashi, Nakazato-village, Tano-county, Gunma Prefecture, Japan, and interprets the cause of the formation of imprints on the basis of thier morphology and distribution with reference to the sedimentary environments of the Sebayashi Formation. The imprints are made up of two groups : one consists of three deep imprints which stand in a row toward the strike in the central zone of the cliff surface (A group); the other consists of imprints of fairly shallow, depressive and various shapes which form a narrow zone from the lowest margin of the mid-breadth of the cliff to the right margin of the mid-hieght (B group). These imprints are interpreted to be dinosaur footprints on the basis of their morphology, size, development of cracks around imprints, resemblance to some iguanodontid footprints, and the regular space between two prints of the same kind and the width of the tracks. A few trackways consisting of these imprints are interpreted to be formed by three or more dinosaurs.