Horn Bluff () is a prominent rocky

headland A headland, also known as a head, is a coastal landform, a point of land usually high and often with a sheer drop, that extends into a body of water. It is a type of promontory. A headland of considerable size often is called a cape.Whittow, John ...

on the northern side of the coastal island at the western side of

Deakin Bay Deakin Bay () is a wide, open bay on the coast between Horn Bluff and Cape Freshfield. The bay was roughly delineated by the Far Eastern Party of the Australasian Antarctic Expedition (1911–14) under Sir Douglas Mawson, who named it for Alfred De ...

, Antarctica. The feature rises to and is marked by the columnar structure of the

dolerite Diabase (), also called dolerite () or microgabbro, is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-grained ...

forming the upper part of it. It was discovered and mapped as part of the mainland by the

Australasian Antarctic Expedition The Australasian Antarctic Expedition was a 1911–1914 expedition headed by Douglas Mawson that explored the largely uncharted Antarctic coast due south of Australia. Mawson had been inspired to lead his own venture by his experiences on Ernest ...

(1911–14) under

Douglas Mawson Sir Douglas Mawson OBE FRS FAA (5 May 1882 – 14 October 1958) was an Australian geologist, Antarctic explorer, and academic. Along with Roald Amundsen, Robert Falcon Scott, and Sir Ernest Shackleton, he was a key expedition leader during ...

, who applied the name for W.A. Horn of

Adelaide Adelaide ( ) is the capital city of South Australia, the state's largest city and the fifth-most populous city in Australia. "Adelaide" may refer to either Greater Adelaide (including the Adelaide Hills) or the Adelaide city centre. The dem ...

, a patron of the expedition. The headland was shown to be on an island by

Australian National Antarctic Research Expeditions The Australian National Antarctic Research Expeditions (ANARE ) is the historical name for the Australian Antarctic Program (AAp) administered for Australia by the Australian Antarctic Division (AAD). History Australia has had a long involv ...

air photos taken in 1962.

References

Headlands of George V Land {{GeorgeVLand-geo-stub