Because they are close to the southern pole, kinda like the north pole but where penguins live, antartica.
They have less-runny lava, meaning that it doesn't travel as far before cooling, meaning that the layers build up more steeply, but don't go out as far. You also get layers of ash on the composite volcano to help build it up too
El consumo y el desempleo están directamente relacionados. El nivel de consumo en un país determinado determina el nivel de empleo en un país.
Nitrogen 78%
Oxygen 21%
Argon 0.9%
Carbon Dioxide almost 0.1%