Infomation about stratovolcano

A stratovolcano, also known as a composite volcano,is a tall,conical volcano bulit up by many layers(strata) of hardened larva ,tephra,pumice,and volcanic ash .Unlike shield volcanoes,stratovolcanoes are characterized by a steep profile and periodic,explosive erupitons.The larva that flows from stratovolcanoes typically cools and hardens before spreading far due to high viscosity.The magma forming this larva is often felsic,having high-to-intermediate levels of silica (as in rhyolite,dacite,or andeste0,with lesser amounts of less-viscous mafic magma.Extensive felsic larve flows are uncommon, but have travelled as far as 15(9.3 mi).

Stratovolcanoes are sometimes called "composite volcanoes" because of their composite layered structure built up from sequential outpourings of eruptive materials. They are among the most common types of volcanoes,in contrast to the less common sheild volcanoes.Two famous stratovolcanoes are Krakatoa,best known for its catastrophic ib1883 and Vesuvius,famous for its destructian of the towns Pompeii and Herculaneum in AD79.