PRESENTATION OUTLINE
Mount Akutan
is a stratovolcano in the Aleutian Islands of Alaska.
Last erupted 1600 years ago.
4,275 feet tall.
Mt. Pinatubo
June 15, 2011 was the 20th anniversary of its last eruption.
It's in the Cabusilan Mountains on the island of Luzon.
Earth's volcanoes occur because the planet's crust is broken into 17 tectonic plates that float on a hot layer in the Earth's mantle. So, on Earth, volcanoes are generally found where tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's interior plates, away from plate boundaries has also been explained as mantle plumes. These so-called "hotspots", for example Hawaii, are postulated to arise from upwelling diapirs with magma from the core–mantle boundary, 3,000 km deep in the Earth. Volcanoes are usually not created where two tectonic plates slide past one another.
Magma is in the ground lava is on earths surface.
Active volcanoes still have the potential to erupt.
Extinct volcanoes are never going to erupt again.
The gas they release hurts the atmosphere.
The lava, when mixed with water creates mud slides that destroy everything.
The lava itself burns everything down.
