・ Limits and failures on the theory of plate tectonics
For now, tentatively, mechanisms in the earth have been scarcely clarified.
Simply thinking about that, what is the eruptive energy originated in ?
According to the theory of plate tectonics ( regarded as an accepted theory at present ), the earth has main several crustal plates, those plates relatively move, strain energies are gradually accumulated by inter-frictional heats and finally an eruption or an earthquake is caused by those accumulated strain energies beyond some critical condition.
But, many people have doubts about this theory which asserts that a large scale energy is generated from inter-frictions among giant plates which move by several centimeters a year.
It's insufficient to explain complicated phenomena inside the earth with only the theory of plate tectonics.
※ At present, it's made clear that the earth is covered with enormous plates namely hundreds of plates far from several plates.
