2.1 Tongariro Volcanic Centre- Aspect 3 Flashcards
1
Q
When was Mt Ruapehu formed?
A
250,000 years ago
2
Q
When was Mt Ngaururhoe formed?
A
2,500 years ago
3
Q
When did sand and silt erode from Gondwanaland?
A
50 million years ago
4
Q
How did the Subduction occur?
A
The Pacific Plate when under the Indo-Australian Plate
5
Q
How many glaciers on Mt Ruapehu?
A
5
6
Q
What did glaciation produce?
A
U-shaped valleys, cliffs, bluffs
7
Q
When did Glacial erosion predominately occur?
A
20,00 years ago
during the ice age
8
Q
When did fluvial erosion begin?
A
15,000 years ago
after the ice age ended
9
Q
What does freeze-thaw produce?
A
scree slopes
Eg. Mt Ruapehu
10
Q
Where is eroded material deposited?
A
On the ring plain
