Hotspots and magnetic reversals
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hotspots and magnetic reversals. Pacific Ring of Fire. Volcanism is mostly focused at plate margins. Volcanoes are formed by:. - Subduction - Rifting - Hotspots. Pacific Ring of Fire. Hotspot volcanoes. What are Hotspot Volcanoes?.

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Hotspots and magnetic reversals

hotspots and magnetic reversals


Hotspots and magnetic reversals

Pacific Ring of Fire

Volcanism is mostly focused at plate margins


Hotspots and magnetic reversals

Volcanoes are formed by:

- Subduction - Rifting - Hotspots


Hotspots and magnetic reversals

Pacific Ring of Fire

Hotspot volcanoes


Hotspots and magnetic reversals

What are Hotspot Volcanoes?

  • Hot mantle plumes breaching the surface in the middle of a tectonic plate

The Hawaiian island chain are examples of hotspot volcanoes.

Photo: Tom Pfeiffer / www.volcanodiscovery.com


Hotspots and magnetic reversals

The tectonic plate moves over a fixed hotspot forming a chain of volcanoes.

The volcanoes get younger from one end to the other.


Magnetic reversals

Magnetic Reversals

  • The changing in direction of the Earth’s magnetic poles.

  • When the Earth’s poles do change direction, the rocks on the seafloor become magnetically charged in the opposite direction


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