Which type of rock will be formed from magma that is ejected from volcanic eruption?

Which type of rock will be formed from magma that is ejected from volcanic eruption?

Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth’s surface. These are the rocks that form at erupting volcanoes and oozing fissures.

What types of magma are erupted from the volcanoes?

There are three basic types of magma: basaltic, andesitic, and rhyolitic, each of which has a different mineral composition. All types of magma have a significant percentage of silicon dioxide. Basaltic magma is high in iron, magnesium, and calcium but low in potassium and sodium.

What type of volcano are formed from lava ejected?

Cinder cones
Cinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone.

Which is an extrusive igneous rock?

Extrusive, or volcanic, igneous rock is produced when magma exits and cools as lava at or near the Earth’s surface. Types of extrusive igneous rocks include: pumice, obsidian, andesite, rhyolite, and basalt.

What elements has the highest amount in the magma?

Oxygen, the most abundant element in magma, comprises a little less than half the total, followed by silicon at just over one-quarter. The remaining elements make up the other one-quarter. Magmas derived from crustal material are dominated by oxygen, silicon, aluminum, sodium, and potassium.

What type of magma is most likely erupt explosively?

A high viscosity magma will flow more readily and easily than a low viscosity magma. Therefore the eruption will be explosive. A high viscosity magma will flow more readily and easily than a low viscosity magma.

Which magma type erupts most violently?

The most spectacular and most violent of all types of volcanic eruptions is what is known as a Plinian eruption. This type of eruption happens when gassy magma is fragmented and associated with very viscous magma.

How magma that cools inside Earth?

Igneous rocks are formed when magma ( molten rock deep within the earth) cools and hardens. Sometimes the magma cools inside the earth, and other times it erupts onto the surface from volcanoes (in this case, it is called lava). When lava cools very quickly, no crystals form and the rock looks shiny and glasslike. Click to see full answer.

What magma is most viscous?

Acid (granitic) magma is usually more viscous, especially after losing volatile components. This magma forms extrusive domes in volcanic vents; more rarely it forms flows. Acid magma, which is rich in volatiles, is usually erupted and forms thick layers of ignimbrite.