- What type of magma has the highest silica content?
- Which type of volcano has the most violent eruptions?
- What type of magma flows the fastest?
- What type of lava is most explosive?
- What mineral affects the thickness of magma?
- Which magma type has the lowest viscosity?
- Which Magma has the highest viscosity?
- Where are most volcanoes located?
- What 3 things determine how thick or thin magma is?
- What are two ways a primary magma can be generated?
- Can magma melt steel?
- How deep in the earth is magma?
- What triggers a volcanic eruption?
- Is felsic magma explosive?
- What are the 3 major types of magma?
- What causes the magma to rise?
- How viscosity affects the movement of magma?
- What’s the difference between magma and lava?
- Which kind of eruptive activity is highly explosive?
- Which magma composition causes the most violent eruptions?
- Which type of magma is thick?
What type of magma has the highest silica content?
MAGMA COMPOSITION AND ROCK TYPESSiO2 CONTENTMAGMA TYPEVOLCANIC ROCK~50%MaficBasalt~60%IntermediateAndesite~65%Felsic (low Si)Dacite~70%Felsic (high Si)Rhyolite.
Which type of volcano has the most violent eruptions?
stratovolcanoesBecause they form in a system of underground conduits, stratovolcanoes may blow out the sides of the cone as well as the summit crater. Stratovolcanoes are considered the most violent.
What type of magma flows the fastest?
The most common lava is basaltic, which is as fluid and as free-flowing a lava as you’ll likely come across. Compared to most types, it’s made of a lower percentage of silicon and oxygen chains. These elements form the “framework” of the lava, so with less of them present, the lava less viscous, and it can flow faster.
What type of lava is most explosive?
Viscous lava will trap pockets of gas within the rock, and not let them pop as bubbles on the surface. But most importantly, highly viscous lava is associated with explosive eruptions and dangerous pyroclastic flows. An example of a low viscosity (fast flowing) lava is basaltic lava.
What mineral affects the thickness of magma?
Felsic magmas are higher in silica and contain lighter colored minerals such as quartz and orthoclase feldspar. The higher the amount of silica in the magma, the higher is its viscosity. Viscosity is a liquid’s resistance to flow. Viscosity determines what the magma will do.
Which magma type has the lowest viscosity?
Viscosity of MagmasSummary TableMagma TypeSolidified RockViscosityBasalticBasaltLowAndesiticAndesiteIntermediateRhyoliticRhyoliteHighSep 14, 2015
Which Magma has the highest viscosity?
rhyolitic magmaThe magma that has the highest viscosity is rhyolitic magma.
Where are most volcanoes located?
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.”
What 3 things determine how thick or thin magma is?
The three things that determine how thick or thin magma is temperature, silica content, and gas content.
What are two ways a primary magma can be generated?
0 Answers. Answer: Primary magmas can be generated through decompression melting at mid-ocean ridges or when water dehydrated from a subducting plate promotes partial melting.
Can magma melt steel?
Liquid lava temperature is not very high, and won’t melt a chunk of steel for example. Consider this – your normal large firewood burns at 600-800 degrees, which is just a little bit less than liquid lava temperature. You can melt lead, aluminium and maybe copper in this (with due insulation), but that’s about it.
How deep in the earth is magma?
A layer of molten rock trapped since Earth’s formation may exist where the solid mantle meets the core, a new study says. A layer of searing hot liquid magma trapped since Earth’s formation may lie 1,800 miles (2,900 kilometers) beneath our feet, new research suggests.
What triggers a volcanic eruption?
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.
Is felsic magma explosive?
In general, the more felsic the magma the greater the volatile content. So mafic/basaltic volcanoes are fairly quiescent, intermediate/andesitic volcanic eruptions are moderately explosive, and felsic/rhyolitic volcanoes may be extremely explosive.
What are the 3 major types of magma?
There are three basic types of magma: basaltic, andesitic, and rhyolitic, each of which has a different mineral composition.
What causes the magma to rise?
Magma can rise when pieces of Earth’s crust called tectonic plates slowly move away from each other. … Magma also rises when these tectonic plates move toward each other. When this happens, part of Earth’s crust can be forced deep into its interior. The high heat and pressure cause the crust to melt and rise as magma.
How viscosity affects the movement of magma?
The more fluid a magma, the more likely it is to erupt. On the other hand, when more viscous (higher viscosity) lavas do erupt, they usually do so explosively. Viscosity also affects the shapes of lava flows and the mountains they erupt from. The more viscous the magma, the fatter the lava flow.
What’s the difference between magma and lava?
What is the difference between “magma” and “lava”? Scientists use the term magma for molten rock that is underground and lava for molten rock that breaks through the Earth’s surface.
Which kind of eruptive activity is highly explosive?
geo quiz 6QuestionAnswerSpreading center volcanism most generally produces rocks that are ________.basaltic in compositionWhich kind of eruptive activity is most likely to be highly explosive?eruptions of big, continental margin, composite cones or stratovolcanoes66 more rows
Which magma composition causes the most violent eruptions?
The largest and most violent of all the types of volcanic eruptions are Plinian eruptions. They are caused by the fragmentation of gassy magma, and are usually associated with very viscous magmas (dacite and rhyolite).
Which type of magma is thick?
High viscosity magma is very thick and pasty. It usually has a large amount of dissolved gas . It usually erupts violently. Low Viscosity magma is thin and runny with little dissolved gas.