Volcanic bombs

Frequently crashes down in a crater larger or smaller part of the old cone and crush again thrown up: sometimes, all the old cone flies into the air. But the wreckage of the cone gives only a small portion spewed friable products: the main mass of them consists of molten rock that are ejected from deep and powerful burst of steam grinding into fine dust, like water, which is fired from a pistol. The validity of this view confirmed by many phenomena, and above all a special type of round or oval so-called "twisted bombs." In Naples, they are called "tears of Vesuvius, is chunks of lava ejected from a crater in the molten state and solidified during flight through the air, due to rotational motion, they were covered with spiral grooves. In most cases, loose products superior to the mass of flowing lava. If the eruption occurs under water or solids to fall into the sea, formed laminated sediments of volcanic tuff, sometimes enclosing the remains of marine animals. All the Neapolitan campaign consists of rocks, their origin can hardly be attributed to the activity of Vesuvius; probably admit that they are cast out by volcanoes Flegreyskih fields. According to Tseekke them should be attributed to eruptions of Crater Camaldoli.