0
If the gases separate rapidly and cannot escape immediately, they can build up pressure greater than that of the overlying rock. When this happens, they break the rock suddenly as a violent explosion occurs sending a plume of gas and ash upwards to heights as great as 20 miles.
see related link (below)
What else can I help you with?
What happens when the gas in magma is unable to escape?
If the gas cannot escape, such as when the magma solidifies underground, then the gasses become part of the minerals within the igneous rock. Since the main gas in most magma is water vapor, this effect will manifest mostly as hydrous minerals such as amphibole and mica.
What type of magma causes quiet eruption?
Magma with low viscosity, such as basaltic magma, typically causes quiet eruptions. This type of magma flows easily and allows gases to escape, resulting in relatively gentle eruptions with less explosive activity.
Magma that is relatively thin dark colored and low in silica?
This type of magma is called mafic magma. It has a low viscosity due to its low silica content, allowing gases to escape easily. It typically contains high levels of iron and magnesium, making it darker in color.
Why is magma that contains little silica less likely to erupt explosively?
Magma with low silica content is less viscous, allowing gas bubbles to escape more easily, reducing pressure buildup that leads to explosive eruptions. In contrast, high-silica magma is more viscous, trapping gas bubbles, which can lead to explosive eruptions when pressure is released suddenly.
Can a human escape magma?
No, it is not possible for a human to escape magma as it is molten rock that can reach temperatures over 1300 degrees Fahrenheit. Any contact with magma would be fatal almost instantly.
What happens when the gas in magma is unable to escape?
If the gas cannot escape, such as when the magma solidifies underground, then the gasses become part of the minerals within the igneous rock. Since the main gas in most magma is water vapor, this effect will manifest mostly as hydrous minerals such as amphibole and mica.
What type of magma causes quiet eruption?
Magma with low viscosity, such as basaltic magma, typically causes quiet eruptions. This type of magma flows easily and allows gases to escape, resulting in relatively gentle eruptions with less explosive activity.
Magma that is relatively thin dark colored and low in silica?
This type of magma is called mafic magma. It has a low viscosity due to its low silica content, allowing gases to escape easily. It typically contains high levels of iron and magnesium, making it darker in color.
Why does a runny volcano not explode?
The explosive force of an explosive eruption comes from gasses trapped in the magma. Runny magma does not hold gasses very well, and so those gasses escape before the magma erupts. The runny magma can also easily flow to the surface without getting stuck and having to be blown out, unlike thicker types of magma.
Why is magma that contains little silica less likely to erupt explosively?
Magma with low silica content is less viscous, allowing gas bubbles to escape more easily, reducing pressure buildup that leads to explosive eruptions. In contrast, high-silica magma is more viscous, trapping gas bubbles, which can lead to explosive eruptions when pressure is released suddenly.
Can a human escape magma?
No, it is not possible for a human to escape magma as it is molten rock that can reach temperatures over 1300 degrees Fahrenheit. Any contact with magma would be fatal almost instantly.
Scientists measure which element in order to classify magma?
Scientists measure the silica content in magma to classify it into different types based on its composition. The silica content determines the magma's viscosity, which impacts how easily gases can escape and influences the type of volcanic eruption that may occur.
Do gases escape from a low silica magma easier than it does a high silica magma?
yes
What is a constructive boundarie?
At a constructive plate boundary two plates move apart. As they move apart the magma from the magma chamber flows up to fill the gap. This causes a volcano. However, as the magma can escape easily it flows down the volcano with only a little bit of force. So it has a gentle erupt.
How does the viscosity of magma contrast in quiet and explosive eruptions?
Effusive eruptions occur when hot basalt magmas reach the surface allowing gases to escape easily as the magma erupts. Explosive eruptions occur where cooler, more viscous magmas reach the surface. The gases cannot escape as easily, so pressure builds up until the gasses violently blast out rock and lava.
Why is silica rich magma explosive?
This is because silica-rich magma is thicker. The thicker the magma, the chance for the dissolved gas in there to escape is less likely. This causes an explosion. When the gases do escape, they cause an even bigger explosion
What determines the frequency and types of eruptions you can expect from a volcano?
The crystal and gas content and temperature of a magma help determine a volcano's eruption style. • Crystals in magma make it more viscous, so magma with a high crystal content is more likely to explode than flow. • Gases create explosions if they cannot easily escape from viscous magma, but they can also be released without explosions (or with only minor ones) from fluid magma. • High-temperature magmas usually erupt effusively, while low-temperature magmas cannot flow easily and are more likely to erupt explosively.
