Mount St. Helens is generally regarded as an explosive volcano, but like most stratovolcanoes, it can produce both explosive and non-explosive eruptions.
Mt. St. Helens has erupted a very broad spectrum of igneous rocks. Primarily it is known as an explosive volcano meaning that it most commonly erupts Dacite, which has a high amount of silica present in the rock. However, throughout the geologic history of the volcano it has erupted everything from Basalt (very fluid, Hawaiian style) magma, to Rhyodacite (very sticky, explosive) style of magma. The silica content in a volcanoes magma supply primarily determines if the volcano will tend to have an explosive type of eruption or if it will tend to fountain lava. Mt. St. Helens having primarily Dacite tends to be a commonly more explosive volcano when it goes through its eruption periods. For a further detailed geologic history of Mt. St. Helens please see related links to the Geologic History of Mt. St. Helens as provided by the United States Geological Survey, Cascades Volcano Observatory.
Mt. Thera, also known as Santorini, is a composite volcano, which is a mix of explosive and effusive eruptions. It is characterized by its steep slopes and periodic explosive eruptions due to the buildup of gas pressure within the magma chamber.
Mt. Helens
Mount Shasta is considered a potentially explosive stratovolcano due to its composition of andesite and dacite lava which can lead to explosive eruptions. However, its most recent eruptions have been relatively non-explosive with mainly effusive lava flows.
Mount St. Helens is generally regarded as an explosive volcano, but like most stratovolcanoes, it can produce both explosive and non-explosive eruptions.
yes, Mt Saint Helens is a volcano. located in Skamania County, Washington
Mt. St. Helens Mt. St. Helens
Mount St. Helens is a stratovolcano, also known as a composite volcano. This type of volcano is characterized by its steep slopes and explosive eruptions due to a mixture of lava flows and pyroclastic material.
No. Kilauea generally produces effusive eruptions. Explosive eruptions are rare.
volcano
its a volcano
Mt. St. Helens has erupted a very broad spectrum of igneous rocks. Primarily it is known as an explosive volcano meaning that it most commonly erupts Dacite, which has a high amount of silica present in the rock. However, throughout the geologic history of the volcano it has erupted everything from Basalt (very fluid, Hawaiian style) magma, to Rhyodacite (very sticky, explosive) style of magma. The silica content in a volcanoes magma supply primarily determines if the volcano will tend to have an explosive type of eruption or if it will tend to fountain lava. Mt. St. Helens having primarily Dacite tends to be a commonly more explosive volcano when it goes through its eruption periods. For a further detailed geologic history of Mt. St. Helens please see related links to the Geologic History of Mt. St. Helens as provided by the United States Geological Survey, Cascades Volcano Observatory.
Mt. Thera, also known as Santorini, is a composite volcano, which is a mix of explosive and effusive eruptions. It is characterized by its steep slopes and periodic explosive eruptions due to the buildup of gas pressure within the magma chamber.
Mt. Helens
Mt Pompeii and Mt Saint Helens
Mount Shasta is considered a potentially explosive stratovolcano due to its composition of andesite and dacite lava which can lead to explosive eruptions. However, its most recent eruptions have been relatively non-explosive with mainly effusive lava flows.