What Happens When A Volcano Meets a Glacier?

The video explores the interaction between glaciers and volcanoes, highlighting how glaciers can suppress volcanic activity by exerting pressure on the Earth's mantle. During the last Ice Age, glaciers covered a significant portion of the Earth's surface, leading to a volcanic dry spell. The video explains how glaciers prevent magma from rising by maintaining pressure, even at tectonic seams. After the Ice Age, volcanic activity surged as glaciers melted, particularly in regions like Iceland. The video concludes by suggesting that future glaciations could again suppress volcanic activity, illustrating a dynamic geologic interplay.

What natural force is described as being able to suppress volcanic activity?

• The ocean tides

• The crushing weight of glaciers

• The movement of tectonic plates

• The gravitational pull of the moon

During the last Ice Age, what fraction of the Earth's surface was covered by glaciers?

• 1/4

• 2/3

• 1/2

• 1/3

How do glaciers prevent the formation of magma at tectonic plate seams?

• By blocking the tectonic plates

• By cooling the magma

• By increasing the pressure on the mantle

• By absorbing the magma

What happens to magma when glaciers exert pressure on the crust and mantle?

• It remains pooled in chambers

• It cools down and solidifies

• It rises to the surface

• It evaporates

What was the increase in volcanic eruptions in Iceland after the last Ice Age compared to the previous 100,000 years?

• 40 times more

• 20 times more

• 10 times more

• 30 times more