- Onnum Ridge
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Onnum Ridge (80°7′S 156°25′E / 80.117°S 156.417°E) is a mountain spur that descends northeast to McCraw Glacier, 3 nautical miles (6 km) south of Derrick Peak in the Britannia Range. Named in association with Britannia by a University of Waikato (N.Z.), geological party, 1978–79, led by M.J. Selby. Onnum is a historical placename formerly used in Roman Britain.
This article incorporates public domain material from the United States Geological Survey document "Onnum Ridge" (content from the Geographic Names Information System).
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