LW Nevado Del Ruiz Flashcards
Where is Nevado Del Ruiz?
It is in Columbia, in the northen Andes
When was the main eruption?
13th November 1985
What type of volcano was NDR?
composite
Define the term lava
The molten rock that is issued from a volcano
Define the term lahar
A landslide of water and ash
In the eruption, which direction was the Nazca plate moving?
In an easterly direction
In the eruption, what direction was the South American plate moving?
West
How many people did it kill?
About 25,000
Is the oceanis plate or the continental plate denser?
The oceanic plate
Was the Nazca plate continental or oceanic?
Oceanic
Was the South American plate oceanic or continental?
Continental
Did the Nazca plate subduct under the South American plate or was it the other way round?
The Nazca plate subducts under the South American plate
At what depth was the pressure high enough to to melt the oceanic plate?
200KM
Where was the weak spot in NDV?
In the mantle and crust
What did NDV shoot out?
Molten lava
Was there a lahar or not?
Yes, there was a lahar.
Why did the people of Armero ignore the warning signs about this eruption?
Because it hadn’t erupted for 100 years
By the next morning, how thick was the layer of mud?
8m high
What was a consiquence of ignoring warning signs?
There was not an emergency team or any aid on hand to help.
What time did the volcano erupt? What were the problems with this?
11pm and everyone was asleep so it was harder to make a quick escape.
