Volcanic eruptions
Pyroclastic material
What is Pyroclastic material
Pyroclastic material is bunch of fragments of rocks that form during volcanic eruptions Pyroclastic material is a type of felsic magma that is formed during volcanic eruptions and because it has a higher viscosity It traps more gas that means violent eruptions shooting fire bombs
Types of Pyroclastic material
volcanic ash
Pyroclastic particles that are less then 2 mm in diameter
Volcanic dust
A cloud of particles that are less than0.25 in diameter
Lapilli
Volcanic rocks made out of Pyroclastic material that is less then 64 mm in diameter
Quiet Eruptions
A oceanic volcanos are mostly made from mafic magma cause of the low viscosity
Pahoehoe
Pahoehoe is a type of mafic lava as it cools it becomes smooth & kind of ropy
Aa
Aa lava is basically deformed pahoehoe that becomes jagged chunks
Blocky lava
Blocky lava has higher silica which makes it more viscous while the top is solid the magma keeps flowing underneath
Types of volcanos
Volcanic activity produces a variety of different features that form during quiet & violent eruptions
Shield volcanoes
A shield volcano covers a wide area & forms from quiet eruptions
Cinder cones
Cinder cones form from violent eruptions & are made from pyroclastic material
Composite volcanoes
Composite volcanoes have alternating layers of pyroclastic material