Möglicher Einfluß chemischer Gleichgewichte auf Viskosität und Relaxationszeit im Erdinnern

Summary A thermodynamic consideration shows that SiO₂ may be reduced to Si by hydrogen at the temperatures present in the earth's interior. The reaction can be expected to involve a rapid change of viscosity with depth inside the earth, required for the explanation of the seismic discontinuity at 2,900 km.