Global distribution of earthquakes and volcanoes: Completed
- Created by: Janelle M
- Created on: 07-06-18 12:31
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- Global distribution of earthquakes and volcanoes
- The earth's surface crusts
- Oceanic crust - found underneath the oceans. it is denser than the continental crust and can be sub ducted when one one plate goes under the other
- Continental crust - found under land masses or continents. Its is generally older than oceanic crust is less often destroyed
- Earthquakes
- Earthquakes are found along all types of plate boundaries or margins
- Volcanoes
- Volcanoes are also mainly formed at plate boundaries
- Hawaiian islands, which are volcanic in origin, formed in the middle of the Pacific Ocean, more than 3,200 km from the nearest plate boundary
- Hotspot theory
- There are fixed spots in the mantle where magma rises to the surface
- As the crust moves ove these fixed spots, volcanoes are created, eventually forming a chain of volcanoes
- The earth's surface crusts
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