This feature was seen by Discovery Investigations (DI) personnel on the RSS William Scoresby in February 1936, who mapped it as part of the mainland.

It was determined to be an island and named Foldøya by Norwegian cartographers who charted this area from aerial photographs taken by the Lars Christensen Expedition (LCE) in January–February 1937.

Discovered on February 18, 1931, by the British Australian New Zealand Antarctic Research Expedition (BANZARE) under Douglas Mawson.

It was mapped again in February 1936 by DI personnel, then remapped in greater detail from LCE air photos.

[3] Mount Whiteside is a low, conical peak, 190 m (620 ft) high, surmounting the east extremity of Fold Island.