Publisher's Synopsis
Excerpt from The Nature of Ore Deposits, Vol. 2 of 2
The quicksilver ores, therefore, in the most important part of the Idria mines, have impregnated extensive masses of completely disintegrated rock, and have more or less saturated either highly porous or specially bitu minous beds which acted as filters. The real channels of supply are not revealed. As the dislocations of the region are of Tertiary (probably Eocene) age it follows that the impregnation with quicksilver compounds is of very youthful age.
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