Volcanoes 3

Question 1

Hawaiian Eruption

Answer 1

-low viscosity lavas
-large lava flows
-no explosive volcanoes
-vent always open
Shape: shield volcanoes
ex: Big Island, Hawaii

Question 2

Pelean Eruption

Answer 2

-high viscosity lavas
-occasional small lava flows
-very explosive volcanoes
-vent obstructed
-pyroclastic flows
Shape: Stratovolcano

Example: Mt. Pelee(lesser Antilles)

Question 3

Plinian Eruption

Answer 3

-high viscosity lavas
-almost no lava flows
-very explosive lavas
-ash clouds and columns
(can reach the high layer of the atmosphere)

Shape:Stratovolcano
ex: Mt. Vesuvius,Italy

Question 4

tuff

Answer 4

a rock made of pyroclastic deposits, usually welded together by the heat of the flow or cemented by the action of percolating water

Question 5

Jokulhlaup

Answer 5

flood induced by melting of glacier above volcanoes

Question 6

Lapilli

Answer 6

little volcanic stones

Question 7

What makes pyroclastic material very light?

Answer 7

vesicles