Peleean eruptions begin with the formation of domes and avalanches of glowing lava. Later, magma forms a steep-sided dome or outcropping within the vent which can then collapse resulting in additional ash flows. Plinian eruptions are named for the Roman naturalist, Pliny the Elder, who died during an eruption of Vesuvius in AD 79. Many of these eruptions last a few weeks to a few months and the longer of these include showers of ash and lava avalanches. Rhyolitic flood eruptions produce large volumes of material spread over large distances producing broad, nearly level plains.
Ultravulcanian eruptions eject solid rock and steam ranging from ash to block-sized material.
No magma is present. Now, before you start to feel overwhelmed by all this, keep in mind that there is a lot more to volcanoes than morphology and eruptions. From here you might veer off into the history and legends surrounding individual volcanoes, or explore a certain type of volcano that may be abundant in a particular area of the world, or even delve into what exactly causes eruptions. Videos are a great way to capture young imaginations. Includes activity guide for 10 or more activities, student journals, specialized equipment, and consumable materials needed for up to six uses.