Three Types of Volcanoes: Strato volcanoes by Kelly Peskura https://padlet.com/kpeskura15/bopn2advrf24 For the three types of volcanoes, I want you to explain to me what a Stratovolcano is, what are they made of, an example of where this volcano can be found (a picture as well) and any other important pieces of information you want to share! en-us 2016-11-01 13:53:34 UTC 2025-04-02 15:50:49 UTC hello@padlet.com Strato Volcanoes comprise the largest percentage (~60%) of the Earth's individual volcanoes. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134475253 2016-11-01 13:56:22 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134475253 Most strato volcanoes are characterized by eruptions of andesite and dacite - lavas that are cooler and more viscous than basalt. These more viscous lavas allow gas pressures to build up to high levels (they are effective "plugs" in the plumbing), therefore these volcanoes often suffer explosive eruptions. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134475614 2016-11-01 13:57:05 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134475614 Strato volcanoes are usually about half-half lava and pyroclastic material, and the layering of these products gives them their other common name of composite volcanoes. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134475889 2016-11-01 13:57:46 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134475889 The lava at strato volcanoes occasionally forms 'a'a, but more commonly it barely flows at all, preferring to pile up in the vent to form volcanic domes. Some strato volcanoes are just a collection of domes piled up on each other. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134476134 2016-11-01 13:58:21 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134476134 Strato volcanoes are commonly found along subduction-related volcanic arcs, and the magma supply rates to strato volcanoes are lower. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134476314 2016-11-01 13:58:44 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134476314 This is the cause of the cooler and differentiated magma compositions and the reason for the usually long repose periods between eruptions. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134476444 2016-11-01 13:59:01 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134476444 Examples of strato volcanoes include Mt. St. Helens, Mt. Rainier, Pinatubo, Mt. Fuji, Merapi, Galeras, Cotopaxi, and plenty others. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134476511 2016-11-01 13:59:11 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134476511 Although they are not as explosive as large silicic caldera complexes, strato volcanoes have caused by far the most casualties of any type of volcano. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134476741 2016-11-01 13:59:45 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134476741 First is that there are so many more strato volcanoes than any of the other types. This means that there will also be lots of people who end up living on the flanks of these volcanoes. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134476877 2016-11-01 14:00:01 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134476877 Additionally, strato volcanoes are steep piles of ash, lava, and domes that are often rained heavily on, shaken by earthquakes, or oversteepened by intruding blobs of magma (or all of these). This makes the likelihood of landslides, avalanches, and mudflows all very high. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134477018 2016-11-01 14:00:21 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134477018 Another very common and deadly hazard at most strato volcanoes is called a Lahar. Lahar is an Indonesian word for a mudflow, and most geologists use the term to mean a mudflow on an active volcano. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134477355 This is an image of a lahar.]]> 2016-11-01 14:01:02 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134477355 This is an example and image.  Mount St. Helens is a Stratovolcano located  in Washington.  This volcano is still active. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134478403 2016-11-01 14:03:09 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134478403 This is another example and image. Mount Pinatubo is an active stratovolcano in the Cabusilan Mountains on the island of Luzon, near the tripoint of the Philippine provinces of Zambales, Tarlac and Pampanga. kpeskura15 https://padlet.com/kpeskura15/bopn2advrf24/wish/134479947 2016-11-01 14:06:35 UTC https://padlet.com/kpeskura15/bopn2advrf24/wish/134479947