Zeolites are alumino-silicate minerals where usually water molecules are built into the crystal cructure. Zeolites are commonly forming as secondary minerals in volcanic rocks.
Zeolites (Greek, zein, "to boil"; lithos, "a stone") are hydrated aluminosilicate minerals and have a micro-porous structure.
The term was originally coined in the 18th century by a Swedish mineralogist named Axel Fredrik Cronstedt who observed, upon rapidly heating a natural mineral, that the stones began to dance about as the water evaporated. Using the Greek words which mean "stone that boil... Read all
Intraplate volcanism A third tectonic setting where volcanism occurs is believed to be the result of mantle plumes and not directly related to plate boundaries. So called hot spot volcanoes fall into this category.
Tours to erupting volcanoes From time to time, we organize special tours to see volcanoes in eruption. These are often announced only few days or weeks in advance. Find out more!
Earthquakes near volcanoes Earthquakes often precede volcanic eruptions. Find out where the latest earthquakes in the vicinity of volcanoes have occurred.
