Stratovolcanoes

Stratovolcanoes have vertical sides with cones that stick out like enormous bumps. They are built up when eruptions of thick lava, tephra, and pyroclastic flows happen. It takes thousands of years for the pressure to construct up enough in stratovolcanoes to cause an eruption. More than one type of magma builds up in stratovolcanoes. They are basalt, andesite, dacite, and rhyolite magma. All of those magmas cause volatile eruptions apart from basalt magma. There are a group of different vents around stratovolcanoes. Some of the vents are cinder cones and domes low on the sides of the volcano. Sometimes stratovolcanoes are called composite cones.