The Portal (located at 78.0629°S 159.300°E / -78.0629; 159.300) is the gap between the Lashly Mountains and Portal Mountain, through which the main stream of the Skelton Glacier enters the Skelton Névé from the polar plateau. The descriptive name was given in January 1958 by a New Zealand party of the Commonwealth Trans-Antarctic Expedition (CTAE), 1956-58.
References
The Portal Wikipedia(Text) CC BY-SA