The theory of these phenomena was proposed in 1963 by J. Tuzo Wilson, who proposed that since they are fixed,they could be used to measure the direction and speed of the movement of tectonic plates.
The theory of these phenomena was proposed in 1963 by J. Tuzo Wilson, who proposed that since they are fixed,they could be used to measure the direction and speed of the movement of tectonic plates. A 2002 paper by a team from the USGS concluded that the one underneath Yellowstone was caused convectional processes in the upper mantle as well as local lithospheric seismic activity, rather than deep-mantle processes as previously thought. Believed to result from mantle convection rather than penetration of magma plumes through the crust and into the ocean as originally thought, for ten points, identify these warm locations which acts as records of significant seismic activity.
The theory of these phenomena was proposed in 1963 by J. Tuzo Wilson, who proposed that since they are fixed,they could be used to measure the direction and speed of the movement of tectonic plates.
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