What Primary Factors Determine The Nature Of Volcanic Eruptions?
The primary factors that determine the nature of volcanic eruptions include the magma’s temperature its composition and the amount of dissolved gases it contains. As lava cools it begins to congeal and as viscosity increases its mobility decreases. The viscosity of magma is directly related to its silica content.
What primary factors determine the nature of volcanic eruptions quizlet?
what are the primary factors that determine the nature of volcanic eruptions? The magma’s composition it’s temperature and the amount of dissolved gases it contains.
What are the two main factors that determine the type of volcanic eruption?
The two main factors that influence how a volcano will erupt are viscosity and gas content. Both are related to the composition of the magma.
What are the 3 primary factors affecting the volcanoes eruptive style?
The style of eruption depends on a number of factors including the magma chemistry and content temperature viscosity (how runny the magma is) volume and how much water and gas is in it the presence of groundwater and the plumbing of the volcano.
What are the two primary factors that determine how magma erupts quizlet?
The two primary factors that determine how magma erupts is its viscosity and gas content.
What factors determine the type of magma found in a volcano?
Different minerals within a rocks melt at different temperatures and the amount of partial melting and the composition of the original rock determine the composition of the magma. Magma collects in magma chambers in the crust at 160 kilometers (100 miles) beneath the surface of a volcano.
What are effusive and explosive eruptions What are the two primary factors that determine the nature of a volcanic eruption?
The style of a volcanic eruption depends on magma viscosity. Felsic magmas produce explosive eruptions. Mafic magmas produce effusive eruptions. Explosive eruptions happen along the edges of continents and produce tremendous amounts of material ejected into the air.
What determines the type of volcanic eruption?
The style of eruption depends on a number of factors including the magma chemistry and content temperature viscosity volume and how much water and gas is in it the presence of groundwater and the plumbing of the volcano. … For more information on volcanic hazards which can be produced by our volcanoes click here.
What determines how explosive an eruption is?
The amount of dissolved gas in the magma provides the driving force for explosive eruptions. The viscosity of the magma however is also an important factor in determining whether an eruption will be explosive or nonexplosive.
What primary factors determine the nature of volcanic eruptions How do these factors affect a magma’s viscosity?
Viscosity of Magmas
Viscosity is the resistance to flow (opposite of fluidity). Viscosity depends on primarily on the composition of the magma and temperature. Higher SiO2 (silica) content magmas have higher viscosity than lower SiO2 content magmas (viscosity increases with increasing SiO2 concentration in the magma).
What are the 3 factors that affect the nature of an eruption?
There are three main factors that influence the violence of a volcanic eruption: 1. magma viscosity 2. magma temperature and 3. amount of dissolved gases.
What are the 4 types of volcanic eruptions?
There are four types of eruptions with properties determined mostly by the silica content of magma and the amount of gas it contains. In order of increasing explosiveness these are Hawai’ian Strombolian Vulcanian and Plinian eruptions.
What factors increase the explosive potential of magma during a volcanic eruption?
Temperature of magma amount of dissolved gas in High viscosity and dissolved gas increase the explosive potential of a magma.
Which of the following is primarily responsible for explosive volcanic eruptions?
Although there are several factors triggering a volcanic eruption three predominate: the buoyancy of the magma the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber.
What are the main gases released during a volcanic eruption quizlet?
What are the main gases released during a volcanic eruption? The main gas released from a volcanic eruption is water vapor along with carbon dioxide nitrogen and sulfur dioxide. These gases escape when pressure on the magma is reduced.
What two factors control the explosiveness of an eruption?
The amount of water vapor and other gases present is one factor that determines whether a volcanic eruption will be quiet or explosive.
How magma composition affects the eruption of a volcano?
Magmas differ in composition which affects viscosity. Magma composition has a large effect on how a volcano erupts. Felsic lavas are more viscous and erupt explosively or do not erupt. Mafic lavas are less viscous and erupt effusively.
What characteristics of magma determines its explosiveness?
Viscosity together with the amount of gas dissolved in magma can determine the explosivity of the eruption. More viscous magma with volatiles is more explosive than less viscous magma where gases can bubble out relatively easily.
What factors determine whether a volcano is quiet or explosive?
The amount of water vapor and other gases present is one factor that determines whether a volcanic eruption will be quiet or explosive. Gases can be trapped in magma by pressure of surrounding magma and rock eventually they cause an explosive eruption.
What is the difference between effusive volcanic eruption and explosive volcanic eruption?
What causes effusive eruptions?
What is volcanic eruption and its causes?
What determines whether a volcanic activity will be lava flow or a pyroclastic eruption?
Volcanic eruptions can be explosive sending ash gas and lava high up into the atmosphere or the magma can form lava flows known as effusive eruptions. Whether an eruption is explosive or effusive largely depends upon the amount of gas in the magma.
How many types of volcanoes are formed according to the nature of the eruption?
What is the primary factor in determining the viscosity of volcanoes?
There are three main factors that determine the viscosity of magma: temperature water content and silica content. Higher temperatures lower the viscosity of magma so it flows more easily. Water in magma helps it flow more easily. Magma that is high in silica has high viscosity.
What two factors control the explosiveness of an eruption quizlet?
What two factors control the explosiveness of an eruption? The amount of water vapor and silica in the magma.
What is the effect of volcanic eruption?
Volcanoes spew hot dangerous gases ash lava and rock that are powerfully destructive. People have died from volcanic blasts. Volcanic eruptions can result in additional threats to health such as floods mudslides power outages drinking water contamination and wildfires.
How do the three main types of volcanoes differ?
Cinder cone volcanoes are relatively small rarely exceeding 1 000 feet tall. Composite volcanoes also known as stratovolcanoes are towering structures often rising more than 10 000 feet. Shield volcanoes are broad typically 20 times wider than they are high. These volcanoes can be massive.
What are the three main type of volcanoes?
Where do volcanic eruptions generally occur give one example?
Answer: Sixty percent of all active volcanoes occur at the boundaries between tectonic plates. Most volcanoes are found along a belt called the “Ring of Fire” that encircles the Pacific Ocean. Some volcanoes like those that form the Hawaiian Islands occur in the interior of plates at areas called “hot spots..
Are all volcanic eruptions the same?
No the same volcano can produce different magmas at different times and sometimes even in the same eruption. It depends on what has melted to form the magma in the magma chamber and what this magma has mixed with on its way to the surface. … There are two types of igneous rock volcanic and plutonic.
Which type of volcano erupts with the most force?
Stratovolcanoes are considered the most violent. Mount St. Helens in Washington state is a stratovolcano that erupted on May 18 1980.
Why do some volcanic eruptions consist mostly of lava flows while others are explosive and do not produce flows?
Why do some volcanic eruptions consist mostly of lava flows while others are explosive and do not produce flows? Because of its viscosity. If it has high viscosity (felsic) then gas and volatiles cannot escape easily and pressure is built up causing an explosive eruption.
What makes volcanoes more explosive?
When magma is rapidly expelled from a volcano it undergoes rapid cooling. … This induces the formation of crystals resulting in a sudden increase in the viscosity of the magma. In turn this produces magma fragmentation creating a highly explosive eruption.
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