Castillo Nunatak is a conspicuous rocky peak rising to 437 m on the

glacial A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate betwe ...

divide between

Huntress Glacier Huntress Glacier is a glacier long and wide flowing into the head of False Bay, Livingston Island in the South Shetland Islands, Antarctica. It is situated east of Johnsons Glacier, southeast of Contell Glacier and Balkan Snowfield, south o ...

and

Balkan Snowfield Balkan Snowfield (Plato Balkan \'pla-to bal-'kan\) is an ice-covered plateau of elevation ranging from in eastern Livingston Island in the South Shetland Islands, Antarctica, situated south of lower Perunika Glacier, northwest of Huntress Glaci ...

Hurd Peninsula Hurd Peninsula lies between South Bay and False Bay on the south coast of Livingston Island in the South Shetland Islands, Antarctica. The Spanish Juan Carlos I Antarctic Base and the Bulgarian St. Kliment Ohridski Base are situated on its west ...

in eastern

Livingston Island Livingston Island (Russian name ''Smolensk'', ) is an Antarctic island in the Southern Ocean, part of the South Shetlands Archipelago, a group of Antarctic islands north of the Antarctic Peninsula. It was the first land discovered south of 60� ...

in the

South Shetland Islands The South Shetland Islands are a group of Antarctic islands with a total area of . They lie about north of the Antarctic Peninsula, and between southwest of the nearest point of the South Orkney Islands. By the Antarctic Treaty of 195 ...

Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest co ...

. It is linked to

Charrúa Ridge Charrúa Ridge is an ice-free rocky ridge rising to along the northeast coast of Johnsons Dock in Hurd Peninsula, Livingston Island, in the South Shetland Islands, Antarctica. It is narrow and precipitous, extending in a west-northwest to east ...

to the west

Charrúa Gap Charrúa Gap (Sedlovina Charrúa \se-dlo-vi-'na cha-'ru-a\) is a flat ice-covered saddle extending in east-west direction between Castillo Nunatak and Charrúa Ridge on Hurd Peninsula, eastern Livingston Island at an elevation of . The gap ...

and, via Willan Nunatak and

Willan Saddle Willan Saddle (Sedlovina Willan \se-dlo-vi-'na 'wi-l&n\) is a flat, crescent-shaped and ice-covered saddle extending 1 km in the northeast–southwest direction between Burdick South Peak and Willan Nunatak in eastern Livingston Island in ...

, to

Burdick Ridge Burdick Ridge is a ridge rising to an elevation of on Livingston Island in the South Shetland Islands. Extending for between Orpheus Gate in the southeast and Rezen Saddle in the northwest, it is bounded by Perunika Glacier to the northeast ...

to the east-northeast. Castillo Nunatak is a prominent landmark in the Charrúa Gap area. The feature is descriptively named for its abrupt and isolated appearance ('Castle Nunatak' in Spanish).

Location

The peak is located at which is 860 m west of Willan Nunatak, 2.5 km northeast of

Napier Peak Napier Peak is the partly ice-free peak rising to 380 m on Hurd Peninsula, Livingston Island in the South Shetland Islands, Antarctica. It is linked to Charrúa Gap to the north by a 1.5 km ice-covered col, and by an ice-covered saddle to ...

, 2,9 km east of Charrúa Ridge and 2.8 km east-southeast of Krum Rock. Detailed Spanish mapping in 1991, and Bulgarian mapping in 1996, 2005 and 2009.

Maps

Isla Livingston: Península Hurd.
Mapa topográfico de escala 1:25000. Madrid: Servicio Geográfico del Ejército, 1991. (Map reproduced on p. 16 of the linked work) * L.L. Ivanov. Livingston Island: Central-Eastern Region. Scale 1:25000 topographic map. Sofia: Antarctic Place-names Commission of Bulgaria, 1996. * L.L. Ivanov et al. Antarctica: Livingston Island and Greenwich Island, South Shetland Islands. Scale 1:100000 topographic map. Sofia: Antarctic Place-names Commission of Bulgaria, 2005. * L.L. Ivanov
Antarctica: Livingston Island and Greenwich, Robert, Snow and Smith Islands
Scale 1:120000 topographic map. Troyan: Manfred Wörner Foundation, 2009.
Antarctic Digital Database (ADD).
Scale 1:250000 topographic map of Antarctica. Scientific Committee on Antarctic Research (SCAR). Since 1993, regularly upgraded and updated. * L.L. Ivanov. Antarctica: Livingston Island and Smith Island. Scale 1:100000 topographic map. Manfred Wörner Foundation, 2017.

References

SCAR Composite Gazetteer of Antarctica
Nunataks of Antarctica Nunataks of Livingston Island {{Climbing-stub