Annandagstoppane
| Annandagstoppane | ||
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| location | Queen Maud Land , East Antarctica | |
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| Coordinates | 72 ° 32 ′ S , 6 ° 18 ′ W | |
The Annandagstoppane ( English Annandags Peaks ) are an isolated group of Nunatakkern in the East Antarctic Queen Maud Land . They rise up 24 km southwest of the Juletoppane mountain range . Depending on the snow cover, three or four isolated ice-free rocky peaks can be distinguished, which together cover an area of less than 0.1 km².
Norwegian cartographers mapped them based on surveys and aerial photographs of the Norwegian-British-Swedish Antarctic Expedition (1949–1952). Its Norwegian name means “the summit of Christmas Day”.
Geologically, the Annandagstoppane are made up of approximately 3.1 billion year old granites that have emerged from melted sedimentary rocks. Due to the chemical composition and the age, these granites are interpreted as a fragment of the Kaapvaal craton that was left after the opening of the southern ocean in Antarctica , which was given the name Grunehogna craton .
Web links
- Annandags peaks in the Geographic Names Information System of the United States Geological Survey (English)
- Annandags Peaks on geographic.org (English)
Individual evidence
- ^ Annandagstoppane (Dronning Maud Land). In: Place names in Norwegian polar areas. The Norwegian Polar Institute, accessed June 30, 2016 .
- ↑ Marschall, HR, Hawkesworth, CJ, Storey, CD, Dhuime, B., Leat, PT, Meyer, H.-P. & Tamm-Buckle, S. (2010): The Annandagstoppane Granite, East Antarctica: Evidence for Archaean intracrustal recycling in the Kaapvaal-Grunehogna Craton from Zircon O and Hf isotopes. Journal of Petrology 51 (11), 2277-2301.