History of Mount Vesuvius

A number of other phenomena, not excluding so-called laccoliths etc. intrusivnyh forms, shows that the volcanic magma passing through the earth's crust, it produces a lot of pressure. Phenomena of this kind are played at considerable depths in the crust and will be described below us: the volcanoes are formed as magma reached the surface, represent nothing more than the cones of accumulation. Study of Vesuvius and its structure has led us to consider general issues relating to volcanic activity. Here we interrupt the chain of our arguments and return again to the magnificent volcano, Bay of Naples. If we look back and imagine in outline the history of Vesuvius, then note the following: for a few millennia of its activity concentrated in one place and sometimes it breaks down a period of rest, sometimes performed continuously for many years, periods of moderate activity followed by some formidable eruption, the volcano emits lava and loose products, gradually built up by their accumulation of a mountain. In prehistoric times were thrown out for the most part trahitovye lava, and an active volcano was Somme. Then the volcano for many centuries, ceased operations and the eruption in 1979 entered a new phase in its history, and he throws now poor in silica leucite rocks; inside the ring the Somme, a new cone, somewhat eccentrically located, for 1800 years, it continuously increases during periods of moderate activity and again loses her top during a rapid eruptions. Atrio del Cavallo and terrace le Drunken cluttered igneous masses and widens the base of the volcano. If the development of Vesuvius will continue in the same direction, it will merge with the Somme in a huge cone.