Volcanic Eruptions
Describe pyroclastic materials and lava flows
What is pyroclastic material ?
Pyroclastic materials is a fragment rock formed during a volcanic eruption .
Felsic magma is made out a silicon feldspar an it has a light color,it traps more gasses cause it has more viscous .
Volcanic Ash& Volcanic Dust
Particles that are less than 2mm in diameter , Less than 0.25mm in diameter
Lapilli
Less than 64mm In diameter, witch there little stones
Volcanic Bombs & Volcanic Blocks
Large clots throwing out of an eruption volcano ,cool and develop a round or spindle shape. Large pyroclastic materials, form from solid rocks that is blasted from the vent .
What are the types Mafic lava flow ?
Mafic magma has low viscosity and it is made out of magnesium and iron, witch causes it to have its dark color . And has less trapped gasses
Types of Mafic Lava
Pahoehoe
This lava is the least viscous of mafic lava.it gets wrinkly when it cools off .
Aa lava
It is more viscous and it form into sharp rocks when it cools off .
Blocky lava
This lava is the most viscous type of mafic an its makes chunky volcanic rocks when it cools of .
Types of volcanoes
There three types of volcanoes from depending on what type of eruption it produces, such a quiet or explosive eruption. Lava and pyroclastic materials that are ejected during the volcanic eruption build around the vent and form the cone of the volcano. An explosive volcano has felsic magma made out of silica and feldspar and has many trapped gasses and high viscosity witch causes it to explote violently . Witch forms cinder cone an composite types of volcanoes .quiet eruptions has mafic magma made of magnesium and iron witch has less trapped gasses and has low viscosity witch causes it to erupt quietly .