Table of Contents
Which type of magma would erupt most explosively?
Explosive eruptions are favored by high gas content and high viscosity (andesitic to rhyolitic magmas).
What type of lava erupts explosively?
Explosive eruptions occur where cooler, more viscous magmas (such as andesite) reach the surface. Dissolved gases cannot escape as easily, so pressure may build up until gas explosions blast rock and lava fragments into the air! Lava flows are much more thick and sticky so do not flow downhill as easily.
What causes a volcano to erupt explosively?
A volcano’s explosiveness depends on the composition of the magma (molten rock) and how readily gas can escape from it. As magma rises and pressure is released, gas bubbles (mainly of water vapor and carbon dioxide) form and expand rapidly, causing explosions.
When magma has a high viscosity How is it most likely to erupt?
A high viscosity magma will flow more readily and easily than a low viscosity magma. Therefore the eruption will be fluid and passive. A high viscosity magma will flow more readily and easily than a low viscosity magma. Therefore the eruption will be explosive.
Is basaltic magma fluid or viscous Brainly?
Thus, basaltic magmas tend to be fairly fluid (low viscosity), but their viscosity is still 10,000 to 100,0000 times more viscous than water. Rhyolitic magmas tend to have even higher viscosity, ranging between 1 million and 100 million times more viscous than water.
Which kind of magma produces a quiet volcanic eruption?
called basaltic magma. It is fluid and produces quiet, non- explosive eruptions such as those at Kilauea. This type of lava pours from volcanic vents and runs down the sides of a volcano.
What type of eruption is mafic magma?
The adjacent Magma Comparison table summarizes properties of the two basic magma types. Mafic magma produces high volume, slow moving, effusive eruptions. It forms within the upper mantle, much deeper than felsic magma.
Which type of volcanic eruption involves both magma and water?
Volcanic eruptions vary widely in strength. On the one extreme there are effusive Hawaiian eruptions, which are characterized by lava fountains and fluid lava flows, which are typically not very dangerous. On the other extreme, Plinian eruptions are large, violent, and highly dangerous explosive events.
Which is the most explosive type of volcanic eruption quizlet?
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 magma creates shield volcanoes?
Shield volcanoes are almost exclusively basalt, a type of lava that is very fluid when erupted.