There are many volcanoes that form lava domes
around the world. One in particular that is
somewhat close to home is Mount St. Helens,
located in Washington State.
Mount St. Helens is a type of volcano that
erupts very sticky magma (magma is the underground
version of lava; once magma erupts onto the
surface of earth, we call it lava). The eruption
of this sticky magma is very gentle and thus
begins to pile up near the site of eruption
forming a lava dome. The picture below was taken
of the lava dome growing in the crater of Mount.
St. Helens in 1984 (courtesy of the U.S.
Geological Survey). Although it may not look like
it, the material beneath that dome is very hot,
which is why there is hot steam rising from the
dome! In 2004, Mount St. Helens began forming new
lava domes that we can observe today.
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