Transcript Plate Tectonics Project

Plate Tectonics Project
By: Ava Chernicoff
Divergent Plate
Boundary's
A divergent plate boundary is a
place were 2 plates are moving
away from each other and new
crust forms and magma rises to
earths surface
Where in the world?
There is a
Divergent plate
boundary at the
mid Atlantic ridge
Magnetite points to magnetic
north
Scientists have found
the magnetite in basalt
rocks recently erupted
lines up with magnetic
north, which is called
normal polarity. They
have found that in past
eruptions the magnetite
lined up with the south
pole, which is called
reverse polarity.
Basalt
Rock
Convergent Plate
Boundary's
When 2 pieces of land
collide the only place for
them to go is up. When
they go up it causes
mountain ranges.
Where in the world?
There is a convergent
plate boundary at the
Himalayan mountain
range and Tibetan
plateau. They formed
because of the collision
between the Indian Plate
and Eurasian Plate which
began 50 million years ago
and is still going today.
Lithospheric Plates
Earth's crust is fractured into
approximately 20 lithospheric
plates. Each lithospheric plate is
composed of a layer of oceanic
crust or continental crust that
makes an outer layer of the
mantle
Transform
A transform boundary is
when the two boundaries
are moving away from
each other.
Where in the world?
One of the most famous
Transform fault line is the
San Andreas Fault. The San
Andreas Fault is in
California. The San Andreas
Fault is a place where
two Tectonic plates touch,
the North American and
Pacific Plates. The San
Andreas Fault is about 800
miles long including all the
curves.
Prepare for disaster!
The San Andreas fault, which is a
transform fault line is the cause
for the great San Francisco
earthquake in 1906. It was also the
cause for the big Loma Prieta
earthquake. Though, the San
Andreas Fault was the cause for
the Loma Prieta it did not happen
on the fault line. It happened
next to the fault line.
A story from a survivor of the Loma
Prieta earthquake
On October 17, 1989 at 5:04 PM I was
going to Berkeley University and I was in
Chemistry class. We were learning when
all of a sudden everything started
furiously shaking. We all knew it was a
serious 7.1 earthquake. We got under our
desks and waited it out.
-Helen Chernicoff
Flashback to 1906 news
At 5:12 a.m. on April 18, 1906 the
people of San Francisco were
awakened by an earthquake that
would devastate the city. The main
temblor, having a 7.9 magnitude,
lasted about one minute and was the
result of the rupturing of the
northernmost 296 miles of the 800mile San Andreas fault.
-1906 News reporter
Hot Spots
Hot spots are places in
the mantle where rocks
melt and generate
magma.
Where in the world?
One of the most
common hot
spots is Hawaii.
The Hawaii
islands are made
up of lots of
Volcanos.
Active vs. Not Active
There are a lot
of volcanos in
Hawaii and they
were all active
once but today
only 2 are still
active.
Sites
http://dictionary.reference.com/browse/
divergent-plate-boundary
http://www.infoplease.com/spot/sanfra
n1906earthquake.html
http://www.kids-funscience.com/divergent-boundary.html
http://volcano.oregonstate.edu/what-isa-hot-spot
http://www.geolsoc.org.uk/PlateTectonics/Chap3-PlateMargins/Convergent/ContinentalCollision
http://www.encyclopedia.com/doc/1G2
-3437800131.html
http://www.sanandreasfault.org/Inform
ation.html
Thanks
For
Watching!
The End