Abstract
The paper presents a previously unknown occurrence of columnar jointing in silicified Nubian sandstone located above the Third Nile Cataract under the foundations of a Christian/Islamic period fort at Jebel Wahaaba.
The paper presents a previously unknown occurrence of columnar jointing in silicified Nubian sandstone located above the Third Nile Cataract under the foundations of a Christian/Islamic period fort at Jebel Wahaaba.