Map - Yalour Islands (Yalour Islands)

Yalour Islands (Yalour Islands)
Yalour Islands, also known as the Jalour Islands, is a group of islands and rocks 1.5 nmi in extent in the south part of the Wilhelm Archipelago. The group lies 1 nmi northwest of Cape Tuxen, Graham Land. Discovered and named by the French Antarctic Expedition, 1903–05, under J.B. Charcot. Named for Lieutenant Jorge Yalour, Argentine Navy, an officer of the Argentine corvette Uruguay which came to the rescue of the shipwrecked Swedish Antarctic Expedition in November 1903.

The rocks observed on the Yalours and surrounding areas are predominantly igneous intrusives that have cooled deep under ground. The main rock type is grey to black gabbro composed of small crystals of grey-white feldspar and black pyroxene. The rocks here were formed by much the same process that the rest of the peninsula was formed; the Pacific plate sliding under the Antarctic Peninsula in an ocean/continent subduction-type tectonic event. This process, called orogenesis, is one of the most common ways for a mountain chain to form. The Andres and the coast ranges of North America are other classic examples of this type of tectonism. The mountain building has nearly stopped though; it is only at the very tip of the peninsula and in the South Shetland Islands that the process continues. For the rest of the peninsula, it erosion and gravity's turn to shape the landscape.

About 8,000 pairs of Adelie penguins nest in the Yalour Islands.

* List of Antarctic and sub-Antarctic islands

 
Map - Yalour Islands (Yalour Islands)
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Country - Antarctica
Antarctica is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean (also known as the Antarctic Ocean), it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of 14200000 km2. Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of 1.9 km.

Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over 200 mm along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost 60 m. Antarctica holds the record for the lowest measured temperature on Earth, −89.2 C. The coastal regions can reach temperatures over 10 C in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation occurs, it is mostly in the form of lichen or moss.
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