A prominent nunatak, 2,240 m, standing 3 mi S of Turnstile Ridge in the NW part of Britannia Range. It is the westernmost rock outcrop in this part of the range. The Darwin Glacier Party of the CTAE set up a survey station on its summit in December 1957. The name was suggested by Squadron-Leader J.R. Claydon, RNZAF, who first saw the feature from the air.