ER Nevada Del Ruuiz Flashcards
Name the 4 plate margins
destructive, collision, constructive, conservative
What is the differnce between a continental crust and an oceanic crust?
The oceanic crust is denser, thinner and contains less silica and aluminium and more magnesium and iron than the continental crust
What was the date when the Nevada Del ruiz erupted?
13th November 1985
How many km/h did the lava pour down the valley?
50km/h
Which crust melts under the surface and at what depth?
The Oceanic Plate at 200km
Why does the Oceanic Crust melt?
Because the pressure is high enough.
What is the difference between magma and lava?
Magma is lava, just under the surface and lava is out on the surface of the earth
Where is the Nevada Del Ruiz?
Colombia
Which two plate margins made the Nevada Del Ruiz erupt?
The Nazca Plate and the South American Plate
How does the magma reach the surface?
It finds a weakness in the surface
How is lahar created?
When the molten lava melts the ice caps
What is a lahar
It is a volcanic hazard
In which dirction did the Nazca plate move in?
An easterly dirction
In which direction did the south American plate move in?
A westerly direction
How thick was the mudflow?
30 metres
