Map - Lyddan Island (Lyddan Island)

Lyddan Island (Lyddan Island)
Lyddan Island is an ice-covered island located at the southwestern extremity of the Riiser-Larsen Ice Shelf, separating it from the Brunt Ice Shelf, about 20 nmi off the Princess Martha Coast of Antarctica. It is about 45 nmi long and has three narrow arms in the form of a trefoil. It was discovered and plotted by W.R. MacDonald on November 5, 1967, in the course of a U.S. Navy Squadron VXE-6 reconnaissance flight over the coast in LC-130 aircraft, and was named by the Advisory Committee on Antarctic Names for Robert H. Lyddan, Chief Topographic Engineer of the United States Geological Survey, who had been active in the planning and supervision of Antarctic mapping operations since the 1950s.

Though originally recorded as an island, later research has shown that the ground surface under the ice is below sea level, indicating that "ice rise" might be a more accurate naming.

 
Map - Lyddan Island (Lyddan Island)
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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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