Name StatusOfficial ValidatedFeatureHillNZ Gazette Reference2012 (53) p.1477DatumRSRGD2000GeoTag[1] PositionDescriptionA glaciated hill about 230m high of basalt and red basalt agglomerate lying between the southernmost Adelie Penguin rookery and the edge of the ice cap on the ice-free lower western slopes of Mt Bird. To the south it slopes to Shell Glacier and to the north to Fitzgerald Stream. Named by the Cape Bird Party of NZGSAE, 1958-59, for Dr Charles Johnson, geologist, US Geological Survey.