Activities Astroni

Its slopes are known for their remarkable steepness and the only access to the crater is an artificial slit in its steep walls, rises at the foot of a wooded park and representing, enclosed by nature itself. The steep walls composed of Astroni trahitovogo tuff and loose volcanic products; Volcano never poured lava inside the crater can be seen only a few hilly elevations of solid trachyte, the latter pulled out, apparently, from the depths of the crater and stopped before reaching the edges. We know nothing about the activities Astroni in historic times. We can not say about the next with the famous Solfatare who reported a particular name to a group of volcanoes. Wide ring it is located almost at the Pozzuoli and its higher points raised above sea level at 200 m and lower at 166 m. The flat bottom of the crater is barely 500 meters in diameter and lies at an altitude of 100 m, ie 70 m below the lowest part of the shaft. Trahitovye tuff, forming the mountain, were severely damaged passes through them in pairs, the same character is the bottom of the crater. Mostly rock makes a distinctive sound when struck an empty vessel that happens, maybe due to the existence of underground cavities, as can be, and as a result of strongly pronounced porosity. Inside the crater is dressed with rich vegetation, eternally verdant shrubs, laurel, etc., but in some places, especially in the eastern part of the rocks exposed at great length, you can clearly see the layered arrangement of tuff, which fall toward the center and are a perfect example the so-called "re-clinal" strata, and in many places of the earth rise Fuma-rolls that produce hydrogen sulfide, and they mainly concentrated on the main Bock on the eastern edge of the crater, here in a small cave is a pool of muddy water from which a loud noise and pulled out a roar of water vapor and hydrogen sulfide, it is - the remainder of the former strong activity of the crater, which entered into that phase now, which are many volcanoes on the road to full peace. Volcanoes that produce hydrogen sulfide and sulfur dioxide are found in various places on the earth's surface. All of them are called solfatar. In ancient times, about which we have no information, the famous Solfatara in Pozzuoli spewed lava: at least part of the ring it was formed by lava, and maybe trachytes of Monte Olibano represent an ancient lava flow. In historical time Solfatary eruption occurred, probably in 1198, ie in one of those times when Vesuvius stopped their activities.