10F_c_Tectonics_ii_HotSpots

10F_c_Tectonics_ii_HotSpots - - Form from Pacific plate...

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Hotspots    - hot (lower density) plumes of mantle originating from lower mantle - mantle melts as material moves up - volcanoes form on tectonic plate above hotspots - assumed to be approximately stationary - so get trail of volcanoes as plate moves across hotspot -  use to estimate directions and velocities of plate motion
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Example:  Hawaiian Islands - Emperor seamount chain
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Unformatted text preview: - Form from Pacific plate moving over hot spot- Volcanoes are youngest in southeast Location of hotspot (Hawaii) Figure 2.28 X Hotspot formed about 16 million years ago Y present day location of hotspot below Yellowstone National Park- responsible for recent/active volcanism and Geysers SRP Snake River plain - trail of extinct volcanoes X Y SRP Atolls See Box 13.2 p.392...
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10F_c_Tectonics_ii_HotSpots - - Form from Pacific plate...

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