Portal:Geography/Did you know/4

... that Viedma Glacier (pictured) is part of the huge Southern Patagonian Ice Field, the third largest expanse of continental ice after Greenland and Antarctica?
... that Ridge A in Antarctica has been identified as the coldest, driest, calmest place on Earth?
... that Mount Widerøe, Antarctica, is named for Viggo Widerøe, who flew aerial photography planes to map 80,000 km² (31,000 sq mi) of the continent's coast?
... that Lake Bistineau in northwestern Louisiana was originally formed in 1800 by flooding stemming from a large log jam on the nearby Red River?
... that Hurricane Greta in 1956 was the largest Atlantic hurricane ever recorded?