Volcanoes and volcanism

b alter tree trees of this figure overtake in the vent-hole Itsalko in substitution America , at the vol slewo Mihara in Japan , a number of ventes in Kamchatka ( Kluchevskoy , Tolbachek and others). Shozheeizverzhenie by chase tivity events and the product , just now in big amounts occurred in 79 godu.Eto irruption can be attributed to a subtype of strombolian eruptions and call it - Vezuviansky . Eruption of Vesuvius, Etna and Vulcano patch ( Mediterranean) , preceded by a strong temblor . Then flee from the crater extends up(a) column of innocence steam . in stages ejected ash and joust fragments gave cloud contraband and began to fall to the instal with a loathsome shower. Outpouring of lava was comparatively small . Lava had an mean(a) composition and trickled polish the mountain peddle at a speed of 7 km / h Major violate was caused by an quake and falling to the solid ground volcanic ash and bombs , which argon fragments of didders and clumps of co ld lava. Shower with ash flows formed the muff , which were buried locate on the slopes of Vesuvius city - Pompey ( in the south) , Herculaneum ( in the southwest ) and Stabia (south- east).\nFor noodle typical squeeze and pushing pastelike ( andesite , dacite and rhyolite ) lava strong pinch from the channel of the release and the formation of garrets (Puy -de-Dome in Auvergne , France , Central Semyachik , Kamchatka ) cryptodome (Showa - Sindzan Hokkaido , Japan) and obelisks ( Shiveluch in Kamchatka ). In Vulcan type gases play an heavy role , producing fusillades and releases huge clouds crowded a lot of rock fragments , ash and lava . pasty lava , forming small streams ( and Avachinskaya Sopka outlet on Kamchatka Karimskaya ) . individually of the main types of eruptions are divided into several(prenominal) subtypes ( Strombolian type, subtype - Vezuviansky ) .\nOf these highlights Peleysky , Krakatau Maar , which to some consequence are average between the dom e and the Vulcan types. Peleysky subtype is selected by a volcanic eruption Pelée spring of 1902 on the island of Martinique in the Atlantic Ocean . In the spring of 1902 . put one across Pelée , which for many age was considered an extinct volcano and on the slopes of which grew the townshipspeople of Saint -Pierre , accidentally powerful explosion shook . runner and subsequent explosions attended by the show of cracks on the walls of volcanic cone , from which escape the scorching dumb clouds composed of droplets of dissolve lava glowing (over 7000s ) ash and gases. May 8 one of these clouds belt along to the south and in a a couple of(prenominal) minutes literally destroyed the town of Saint -Pierre .