Ruhnkeberg
| Ruhnkeberg Festninga |
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 Summit of the Ruhnkeberg |
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| height | 2533 m | |
| location | New Swabia , East Antarctica | |
| Mountains | Mühlig-Hofmann Mountains | |
| Coordinates | 72 ° 8 ′ 0 ″ S , 3 ° 40 ′ 0 ″ E | |
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The Ruhnkeberg ( Norwegian Festninga ) in Neuschwabenland ( East Antarctica ) is a strongly indented, small mountain range that extends over an area of about 100 km² and the highest peak of which reaches a height of 2533 m. It is the westernmost mountain range of the Mühlig-Hofmann Mountains .
geography
The rocks protruding from the inland ice form two narrow, roughly north-south running ridges, which rise up to an altitude of about 1800 m at their north end and rise further to the south; the western ridge with the highest peak is known as Vestvoll , the eastern ridge is called Austvoll . The highest point of the Austvoll is 2515 m above sea level. Festningsporten are separated by the icy notch that separates the Festningsporten .
The Ruhnkeberg consists of banded gneisses and amphibolites with layers of mica schist . The rocks have been folded several times and underwent a high-grade metamorphosis about 540 million years ago as a result of the collision of the western and eastern gondwana . Today's relief is a result of the glaciation of Antarctica, during which existing valleys were deepened and the mountain flanks were sharpened by the grinding effect of the glaciers.
Along the eastern flank of the mountain range there is a small breeding colony of Antarctic petrels ( Thalassoica antarctica ), which comprised around 200 individuals when it was discovered in the mid-1980s.
Surname
The mountain was discovered by the German Antarctic Expedition in 1938/39 and documented with the help of aerial photographs . The mountain got its name after the expedition member Herbert Ruhnke (1914-1945), the radio operator of the Dornier-Wal flying boat from D-ALOX Passat .
During the Norwegian Antarctic expedition from 1956 to 1960, the area was again recorded photogrammetrically , as the German aerial photographs had been lost in the Second World War; the mountain was named Festninga ( Norwegian for fortress ) on the official Norwegian map published in 1962 .
literature
- Y. Ohta (Ed.): Gjelsvikfjella & western Mühlig-Hofmannfjella . Nature Environment Map 24. Norwegian Polar Institute, Tromsø 1999.
- Norsk Polarinstitutt (ed.): Blad J6 Mühlig-Hofmannfjella Sör (topographic map 1: 250,000) . Oslo 1962.
Web links
- Australian Antarctic Data Center datasheet ; Retrieved May 28, 2014
- Ruhnkeberg from the north, photo taken on January 31, 1939
Individual evidence
- ↑ Joachim Jacobs, Wilfried Bauer, C. Mark Fanning: Late Neoproterozoic / Early Palaeozoic events in central Dronning Maud Land and significance for the southern extension of the East African Orogen into East Antarctica . In: Precambrian Research . 126, 2003, pp. 27-53.
- ↑ Gjelsvikfjella & Mühlig-Hofmannfjella, Temakart No. 24, Blad 1