Volcanoes I. Where volcanoes happen A. Mid Ocean Ridges



Download 183.77 Kb.
Page2/5
Date25.02.2021
Size183.77 Kb.
1   2   3   4   5
2. Acidic

-Sticky explosive lava with a silica content of 70% or more.

-Traps gases within it so volcanoes are more explosive.

-creates dome shaped volcanoes (narrow base and high steep sides).

-happens at destructive plate boundaries at subduction zones.

-Example is Mount St. Helens in the USA

B. Pyroclasts

-also known as volcanic bombs

-hot ash, lava and pieces of rock that are thrown out of a volcano.

-Pyroclastic flows are boiling clouds of ash and rock which move quickly and destroy everything in their path.




Share with your friends:
1   2   3   4   5




The database is protected by copyright ©essaydocs.org 2020
send message

    Main page