Portal:Earth sciences/DYK/28

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 * ... that blue-ice areas are places in Antarctica where snow evaporation and wind have exposed blue-colored ice, which often accumulates meteorites (example pictured)?
 * ... that Typhoon Abby originated from the Western Pacific monsoon trough?
 * ... that the exotic metal lutetium-176 decays to the heavy metal hafnium, so it can be used to date ancient rocks?
 * ...that the 1980 Mount St. Helens eruption in Washington was the first major volcanic eruption to occur in the U.S. since the 1915 eruption of Lassen Peak in California?
 * ...that the peak of Mount Hikurangi (1,752 metres) is the highest non-volcanic peak on the North Island of New Zealand?
 * ...that the Comal River is the shortest river in Texas (USA), running entirely within the city limits of New Braunfels?