The traditional view supposes that the upper mantle of the earth behaves as a liquid then it is subjected to small forces for long periods and that differences in temperature under oceans and continents are sufficient to produce convection in the mantle of the earth with rising convection currents under the mid-ocean ridges and sinking currents under the continents.
The traditional view supposes that the upper mantle of the earth behaves as a liquid then it is subjected to small forces for long periods and that differences in temperature under oceans and continents are sufficient to produce convection in the mantle of the earth with rising convection currents under the mid-ocean ridges and sinking currents under the continents.
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2006-7-25 02:54:00
