Named descriptively by New Zealand Geographic Board (NZGB) (1994) following work in the area by a NZGS field party, 1977-78, for a lava flow that fills the pass.

Named after Anne C. Wright (later Anne Wright-Grassham), a geologist with the New Zealand Geological Survey field party in this area, 1977-78; geologist with United States Antarctic Research Program (United States ArmyRP) field parties, 1982-83, 1983-84, and 1985-86 seasons, with work at Ross Island, Minna Bluff, Mount Discovery, Mount Morning, and Mason Spur.

A loud explosive boom was heard by members of a NZGS field party working in the area on December 3, 1977.

Named descriptively by New Zealand Geographic Board (NZGB) (1994) following work in the area by a NZGS field party, 1977-78, from the horseshoe shape of the crater.

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