Other natural climate variations include solar activity and volcanoes.
Russian roulette,” as Scarth observes, “is not a game that volcanoes usually lose.
volcanoes spewed lava and ash, ocean floors were thrust upward, sand and rock and shale settled into slurry.
1610s, from Italian vulcano "burning mountain," from Latin Vulcanus "Vulcan," Roman god of fire, also "fire, flames, volcano" (see Vulcan). The name was first applied to Mt. Etna by the Romans, who believed it was the forge of Vulcan.
A cone-shaped mountain or hill created by molten material that rises from the interior of the Earth to the surface.
Note: Volcanoes tend to occur along the edges of tectonic plates.
Note: Eruptions and lava flows associated with them can be very destructive. (See Mount Saint Helens and Mount Vesuvius.)