Named in 1987 by US-ACAN after Jan A. Holtet of the Norwegian Institute of Cosmic Physics, upper atmospheric physicist at Siple Station, 1970-71.

An isolated mountain 1,105 metres (3,625 ft) high which rises above the interior ice surface of Ellsworth Land about 55 nautical miles (102 km; 63 mi) south-southeast of FitzGerald Bluffs.

Discovered and photographed from the air on November 23, 1935 by Lincoln Ellsworth (Geographical Review, July 1936, p. 459, Fig.

A peak about 15 nautical miles (28 km; 17 mi) north of Mount Rex in Ellsworth Land.

Named by US-ACAN for Charles R. Henkle of USGS, topographic engineer with the Marie Byrd Land Survey Party, 1967-68.

[9] This article incorporates public domain material from websites or documents of the United States Geological Survey.