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The most common rocks in West Antarctica are andesite and rhyolite volcanics formed during the Jurassic Period. There is also evidence of volcanic activity, even after the ice sheet had formed, in Marie Byrd Land and Alexander Island.
The Antarctic Peninsula, roughly 1,000 kilometres (650 mi) south of South America, is the northernmost portion of the continent of Antarctica. Like the associated Andes, the Antarctic Peninsula is an excellent example of ocean-continent collision resulting in subduction. [1]
It is one of the driest places on Earth, [2] though there are several anecdotal accounts of rainfall within the Dry Valleys. [3] [4] The region is one of the world's most extreme deserts, and includes many features including Lake Vida, a saline lake, and the Onyx River, a meltwater stream and Antarctica's longest river.
The Transantarctic Mountains (abbreviated TAM) comprise a mountain range of uplifted rock (primarily sedimentary) in Antarctica which extends, with some interruptions, across the continent from Cape Adare in northern Victoria Land to Coats Land. These mountains divide East Antarctica and West Antarctica. They include a number of separately ...
There are also a variety of siliceous and aluminous metasediments present. Multiple mafic dykes are also present in the area which intrude into the gneisses. [4] [5] The ultra-high-temperature (UHT) Napier metamorphic complex is noteworthy and distinctive due to the presence of the highest grades of metamorphism seen in rocks of any continental ...
Antarctica is the southernmost continent on Earth. While Antarctica has never had a permanent human population, it has been explored by various groups, and many locations on and around the continent have been described. This page lists notable places in and immediately surrounding the Antarctic continent, including geographic features, bodies ...
Antarctica The McMurdo Volcanic Group is a large group of Cenozoic volcanic rocks in the western Ross Sea and central Transantarctic Mountains areas of Antarctica . [ 1 ] It is one of the largest provinces of alkaline volcanism in the world, having formed as a result of continental rifting along the West Antarctic Rift System .
Pages in category "Rock formations of Antarctica" The following 55 pages are in this category, out of 55 total. This list may not reflect recent changes. A.