Question: Which Type Of Lava Is Most Explosive?

Which type of magma is most explosive?

Explosive eruptions are favored by high gas content and high viscosity (andesitic to rhyolitic magmas)….Temperature of MagmasBasaltic magma – 1000 to 1200oC.Andesitic magma – 800 to 1000oC.Rhyolitic magma – 650 to 800oC..

Which volcanic type is the most explosive?

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. Mount St. Helens, in Washington state, is a stratovolcano that erupted on May 18, 1980.

Which type of lava has the highest viscosity?

rhyolitic magmaAnswer and Explanation: The magma that has the highest viscosity is rhyolitic magma.

What makes Lava thick?

The cooler the lava, the higher the viscosity (the thicker it is). Composition: he more felsic the lava (the more silica in the lava), the higher the viscosity because silica forms chains in the cooling lava even before it crystallizes. The more mafic the lava (the less silica in it), the lower the viscosity.

Is Taal volcano dangerous?

Scientists fear a bigger “hazardous eruption” is imminent. Taal is tiny, as volcanoes go, but it has been deadly before. And according to Renato Solidum, the head of the Philippines’ Institute of Volcanology and Seismology (Philvolcs) , it is “very small but a dangerous volcano”.

What is the weakest volcano?

The weakest are Hawaiian and submarine, then Strombolian, followed by Vulcanian and Surtseyan….Volcanic Explosivity Index.VEI0Plume height<100 m (330 ft)eruptive volume *1,000 m3 (35,300 cu ft)eruption typehawaiianexamplekilauea9 more columns

Is Taal a shield volcano?

There are actually three types of volcanoes namely shield, cinder and composite cones. The shield cone looks like an inverted semi-sphere. This type of volcano does not burst out violently. … One example of that is Taal Volcano, a small volcano located in an island at Batangas, Philippines.

What is the biggest type of volcano?

shield volcanoesMauna Kea and Mauna Loa are shield volcanoes. They are the world’s largest active volcanoes, rising nearly 9 km above the sea floor around the island of Hawaii.

What are 4 types of lava?

The most common way to divide lava flows into distinct types is following: Pahoehoe lava flow, Aa lava flow, Blocky lava flow, and also Pillow lava flow. Sometimes Turbulent lava flow is also added, but the latter is only of theoretical interest to scientist because we will not see that type of lava flow in the nature.

What volcano can destroy the world?

Yellowstone volcano WARNING: Catastrophic eruption would destroy ALL life on Earth.

How quickly would lava kill you?

While your lungs would almost undoubtedly be irrevocably charred from the hot air above the lava (assuming relatively static air conditions over the lava), it takes about 80 seconds for the average human to fall unconscious from lack of oxygen, and I highly doubt your body will last that long.

What type of lava 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.

Can lava melt iron?

Iron melts at about 1500 C. Ultramafic lavas can exceed this temperature, but in general, lava will be under 1200 C.

Where is the largest active volcano in the world?

Rising gradually to more than 4 km (2.5 mi) above sea level, Hawaii’s Mauna Loa is the largest active volcano on our planet.

Why do some volcanoes erupt violently while others erupt quietly?

The two main factors that influence how a volcano will erupt are viscosity and gas content. … The magma is very sticky and resists the expansion of the gas bubbles. Ultimately, enough bubbles grow and expand to blow the magma into ash size fragments and eject them violently into the atmosphere.

Where is runny lava found?

Q2-4: Where is runny lava found: (a) On a continental plate, or (b) on an oceanic plate? Why? A2-4: This type of lava is found at mid-ocean ridges or hot spots because it is low in silica content.

What is 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 type of lava is the most dangerous?

Composite volcanoes are some of the most dangerous volcanoes on the planet. They tend to occur along oceanic-to-oceanic or oceanic-to-continental boundaries because of subduction zones. They tend to be made of felsic to intermediate rock and the viscosity of the lava means that eruptions tend to be explosive.

What are 3 types of magma?

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.

Do all volcanoes erupt violently?

In volcanology, an explosive eruption is a volcanic eruption of the most violent type. … Such eruptions result when sufficient gas has dissolved under pressure within a viscous magma such that expelled lava violently froths into volcanic ash when pressure is suddenly lowered at the vent.

What is the steepest type of volcano?

StratovolcanoStratovolcano. This is the steepest type of volcano. It is made up of layers of ash and lava.