5 Questions
Define volcanic processes and give an example.
Volcanic processes are the processes associated with the eruption of molten rock reaching the surface. An example of a volcanic process is the effusive eruption of lava flows.
What is A’a lava and how is it formed?
A’a lava is lava with a rough, stony/jagged surface made of broken lava fragments. It is formed when magma comes out effusively and solidifies on the earth's surface.
How can magma be erupted explosively?
Magma can be erupted explosively when the dissolved gases within it can fragment the magma and the surrounding rocks, creating smaller masses of magma and broken rocks that are forcefully ejected into the air.
What is the term for the individual fragments of magma and broken rocks that are forcefully ejected into the air during an explosive eruption?
The term for the individual fragments is 'pyroclasts'.
What is the general term for the accumulation of pyroclasts, forming the eruption column/cloud?
The general term for the accumulation of pyroclasts is the 'eruption column' or 'eruption cloud'.
Test your knowledge on volcanic processes and the types of lava flows that come out of a volcano. Learn about a'a lava and its unique rough surface made of broken lava fragments. Explore the different ways magma can erupt from a volcano.
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