Portal:Earth sciences/DYK/13

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 * ... that during the collision of India with Asia, the southern part of the Tibetan Plateau achieved its high elevation before the northern part (graphic pictured)?
 * ... that the oldest part of the Western Block of the North China Craton formed 2.7 billion years ago?
 * ... that the Superior Craton covers central Canada?
 * ... that after the devastating 2010 and 2011 Christchurch earthquakes, the New Zealand government "red-zoned", purchased, and demolished 8,000 houses?
 * ... that tropical cyclones leave deposits in lakes that can be used to reconstruct past cyclonic activity?
 * ... that a series of eruptions of Mount Takahe 17,700 years ago may have resulted in an ozone hole?