Of course! Volcanoes and canyons form some of
most impressive geologic features on Earth. Most
people can recognize a picture of the Grand
or one of the Hawaii volcanoes. There are many
different types of volcanoes that come in all
different shapes and sizes. All volcanoes for by
the eruption of “igneous” material (melted rock).
Some volcanoes, like Mauna Loa in Hawaii, erupt
lava that flows and eventually cools to form
rock. Other volcanoes, like Mt. Rainier in
Washington State, have explosive eruptions that
spew out huge clouds of hot gas and ash. The
shape of different volcanoes depends on the type
of eruption that they form from. I included a
picture that shows an example of this.
click here for picture
is one of the Hawaii “shield” volcanoes. Mt.
Rainier is a “composite” volcano. You can see
the picture that shield volcanoes are really big,
but not very steep. Composite volcanoes are
generally smaller, but are steep and jagged.
Canyons form when rivers cut into rock.
water has a lot of energy and can “erode” or
scrape away rock! It usually doesn’t happen very
fast, but over millions of years, huge canyons
be carved. A really good example of this is the
Grand Canyon. The Grand Canyon was carved over
millions of years by the Colorado River, which
runs all the way from the Rocky Mountains in
Colorado to the Pacific Ocean.
Volcanoes are mountains formed by the piling
ash, cinders, or lava that is erupted out of the
earth below. Because of the shape of the way that
these things erupt, volcanoes usually form
cone-shaped mountains, while other mountains are
more often pyramid-shaped.
Canyons are valleys carved out by flowing
such as rivers or streams. This means that
have an uphill and a downhill direction, even in
the bottom of the canyon where the river or
that created the canyon is located. This is
other valleys in which the valley floors can be
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