section_path: Volcanic features/Cryptodomes
section_name: Cryptodomes
paragraph_text: Cryptodomes
  
  Cryptodomes are formed when viscous lava is forced upward causing the surface to bulge. The 1980 eruption of Mount St. Helens was an example; lava beneath the surface of the mountain created an upward bulge, which later collapsed down the north side of the mountain.