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Updated: May 1, 2025
Calogero in the Lipari Islands, where the horizontal strata of tuffs, forming cliffs 200 feet high, have been discoloured in places by the jets of steam often above the boiling point, called "stufas," issuing from the fissures; and similar instances are recorded by M. Virlet of corrosion of rocks near Corinth, and by Dr.
The various elements of the gneiss, with the exception of the quartz, are all softened; and new combinations of the acid with lime, iron, and manganese are continually in progress. The power of subterranean gases is well illustrated by the stufas of St.
In the neighborhood of active volcanoes, such as Vesuvius, the temperature appears to be too high, and the vapor escapes as steam from what are called stufas. When the rocks at the surface are more cooled the water comes forth in liquid form. "We will now pass to the various geyser theories that have been proposed by different writers." Dr.
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