Spilite Arch is a sea-worn arch formed by a pillar of rock 30 m high joined to the coastal cliffs by a spilite sill. The arch is located on the north side of the east tip of Annenkov Island, South Georgia. Named by the United Kingdom Antarctic Place-Names Committee (UK-APC).
This article incorporates public domain material from the United States Geological Survey document "Spilite Arch" (content from the Geographic Names Information System).
References
Spilite Arch Wikipedia(Text) CC BY-SA