Portal:Earth sciences/DYK/20

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 * ... that the landscape of Göreme National Park (pictured) has been formed by volcanic activity followed by erosion?
 * ... that a giant landslide took place on Socompa volcano some 7,000 years ago, moving approximately 19.2 cubic kilometres (4.6 cu mi) of rock?
 * ... that the waterfalls on Catlin Brook are the "holy grail" of Pennsylvania waterfalls?
 * ... that Alaskans in coastal areas evacuated to higher ground where they waited to see if the 2018 Gulf of Alaska earthquake had caused a tsunami?
 * ... that Scott G. Borg is credited with helping develop the drilling technology that retrieved the first pure water samples from half a mile (0.8 km) below the surface of an ice-covered Antarctic lake?
 * ... that the 2010 Mount Meager landslide was one of the largest in Canadian history?