Prime Head is a prominent snow-covered headland

Headlands and bays

Headlands and bays are two related features of the coastal environment.- Geology and geography :Headlands and bays are often found on the same coastline. A bay is surrounded by land on three sides, whereas a headland is surrounded by water on three sides. Headlands are characterized by high,...

 which forms the Northern extremity of Antarctic Peninsula

Antarctic Peninsula

The Antarctic Peninsula is the northernmost part of the mainland of Antarctica. It extends from a line between Cape Adams and a point on the mainland south of Eklund Islands....

. The name Siffrey was given to a cape in this vicinity by the French Antarctic Expedition

French Antarctic Expedition

French Antarctic Expedition refers to several French expeditions in Antarctica.-First expedition:Yves-Joseph de Kerguelen-Trémarec was a French explorer....

 under Capt. Jules Dumont d'Urville

Jules Dumont d'Urville

Jules Sébastien César Dumont d'Urville was a French explorer, naval officer and rear admiral, who explored the south and western Pacific, Australia, New Zealand and Antarctica.-Childhood:Dumont was born at Condé-sur-Noireau...

, 1837-40, and was previously approved for the feature here described. D'Urville's "Cap Siffrey" has since been identified by the UK-APC

UK Antarctic Place-Names Committee

The UK Antarctic Place-Names Committee is a United Kingdom government committee, part of the Foreign and Commonwealth Office, responsible for recommending names of geographical locations within the British Antarctic Territory and the South Georgia and the South Sandwich Islands...

as a point two miles to the ESE, now called Siffrey Point. The name Prime Head, given by the UK-APC in 1963, alludes to the position of the headland as the first or northernmost feature of Antarctic Peninsula.