[H-GM14] Geomorphology

[HGM14-06] Orogens and global landform, revisited through an analysis of digital elevation model

★Invited papers

*Atsushi Ikeda¹ (1.Faculty of Life and Environmental Sciences, University of Tsukuba)

Keywords:Orogen, Megascale landform, Digital elevation model (DEM), Geographic education

This presentation shows statistical relationship between the ages of continental crust and two topographical parameters: elevation and relief both of which derived from a global DEM (Figures 1 and 2). Although the term “orogeny” is tricky because different meanings are put on by different researchers, if we accept the definition that the orogeny is processes growing upper continental crusts along the convergent boundaries of plates, megascale landform is primarily explained by isostatic uplift and following erosion. From this point of view, reeducation is required for geography teachers in Japanese high schools, because they are largely confused about orogeny and orogens.