 | British Association for the Advancement of Science. Meeting - 1865 - 834 pàgines
...thus be left behind long before the spring reaches the earth's surface. If this theory be adopted, it will follow that the metalliferous portion of a fissure,...removed by aqueous denudation. Ages before such changes are accomplished thermal and mineral springs will have ceased to act ; so that the want of identity... | |
 | 1865 - 846 pàgines
...thus be left behind long before the spring reaches the earth's surface. If this theory be adopted, it will follow that the metalliferous portion of a fissure,...removed by aqueous denudation. Ages before such changes are accomplished, thermal and mineral springs will have ceased to act ; so that the want of identity... | |
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... or fluids begin to part with some of their heat. Almost everything, save the alkaline metals, silica, and certain gases, may thus be left behind long before the spring reaches the earth's surface. If this theory be adopted, it will follow that the... 
