Sandstone columns of the 3rd Nile Cataract (Nubia, Northern Sudan) Cílek, Václav ; Adamovič, Jiří ; Suková, Lenka Abstract Publication: Zeitschrift fur Geomorphologie Supplement Pub Date: January 2015 DOI: 10.1127/zfg_suppl/2015/S-00178 Bibcode: 2015ZGmS...59..151C