Transcript Lassen Volcanic National Park

Lassen Volcanic National Park
By: Nolan Ray
U.S. Map of Lassen Volcanic and its park
features
Relief Map of Lassen Volcanic NP
When It Became a National Park
•August 9, 1916
•It was constructed between 1925 and
1931
•This park is 29 miles (47 km)
Why Lassen Volcanic Became National Park
•This 29 mile park was put together in
between 1925 and 1931, that was 10 years
after the Lassen peak erupted. Close by the
Lassen peak roads reaches 8512 feet, that
makes it the highest road in the cascade
mountains. Workers who constructed it felt it
was unique and special. From there it got
voted to be a national park
Extra info About Lassen Volcanic Becoming a
National Park
• The Lassen area was a meeting area for about four
Native American groups. The Astugewi , Yana, Yahi,
and the Maidu.
• The Native Americans helped it become a national
park because they brought it to the attention of
explorers who reported it.
• After the Native Americans brought it to the explorer’s
attention they talked and word got out about this very
big mountain, they brought it to the attention of the
people a who could make it a national park.
• And they did
How Lassen Volcanic Was Formed
• Lassen peak was once part of a much larger mountain
named mount Teham that started 600,000 years ago as
molten rock, known as magma. Magma moved upwards
from the depths of the earth slowly, over the years the
magma formed a mountain estimated to be about 11,000
feet high with a base over 11 miles wide. Eventually the
great Volcano collapsed giving birth to an even smaller
mountains around its rims. Lassen peak is one of the mounts
that the Great Volcano gave birth to. In the middle of the
19th century when the first settlers came over to California
the area around the peak was dotted with bubbling springs
and vents producing steam.
What Rocks You Can Find At Lassen Volcanic
National Park
These are some rocks that are at my park and how you can
identify them.
Andesite- This piece of andesite rock is dark gray with lots of
tiny white feldspar crystals imbedded in with the matrix of the
rock
Banded Pumice- This rock was formed in the eruption of
Lassen Peak on may 22 1915. It is made up of layers of gray
and black lava.
Basalt- This lava rock is recognized by its dark gray color and
has very small mineral crystals within its insides.
• Dacite-This rock is light to medium gray in its texture and has
a very smooth texture. Typical of most Dacite lava rocks
there are many visible mineral crystals with in its insides.
• Rhyodiacite- Note the pink color and large mineral crystals
of white feldspar.
• Breccia- Breccia is a mixture composed of cinder ash, and
broken fragments imbedded in andesitic lava. This rock has a
reddish color and a chunky rough surface.