Central Great Plains thumb|The High Plains of Kansas, in the Smoky Hills near Nicodemus The central section of the Great Plains, between latitudes 42° and 36°, occupying eastern Colorado and western Kansas, is mostly a dissected fluviatile plain. That is, this section was once smoothly covered with a gently sloping plain of gravel and sand that had been spread far forward on a broad denuded area as a piedmont deposit by the rivers which issued from the mountains. Since then, it has been more or less dissected by the erosion of valleys. The central section of the plains thus presents a marked contrast to the northern section.
central great plains thumb|the high plains of kansas in the smoky hills near nicodemus the central section of the great plains between latitudes 42° and 36° occupying eastern colorado and western kansas is mostly a dissected fluviatile plain that is this section was once smoothly covered with a gently sloping plain of gravel and sand that had been spread far forward on a broad denuded area as a piedmont deposit by the rivers which issued from the mountains since then it has been more or less dissected by the erosion of valleys the central section of the plains thus presents a marked contrast to the northern section