Discovered by the Byrd Antarctic Expedition in 1934 from a great distance. Reconnaissance flights by the USAS (1939-41) explored the range. The principle mountain was named Mount Hal Flood by Byrd for his uncle, the Hon. Henry D. Flood, U.S. Representative from Virginia. The name was subsequently transferred by US-SCAN from the mountain to the entire range. Mount Hal Flood is now known officially as Mount Berlin. Other mountains in this range include Mount Moulton and Mount Bursey.