The geology of the Semolale area (previously known as the West Tuli area), an explanation of those parts of Quarter Degree Sheets2128D and 2129C which lie within Botswana, by D.T. Aldiss (1983)

The area of Botswana covered by quarter degree sheets (QDS) 2128D and 2129C was first geologically surveyed by Gerrard in 1961 and 1962 and his monochrome reconnaissance map was published in 1965. The present writer revised this map during 1982, as part of the Botswana Geological Survey's systematic regional mapping programme.