Volcanoe Erruption
Describe pyroclastic material ad lava flows
Quiet Eruptions
Violent Eruptions
Types of Lava
Pahoehoe Lava
The pahoehoe lava forms when the mafic lava cools down,it forms on the surface of the flow. If the lava keeps on flowing after the crust forms it wrinkles to a from of a volcanic rock called pahoehoe. Pahoehoe is formed from hot, fluid lava. As it cools down it forms a smooth ropy texture.
Aa Lava
If the crust deforms rapidly or grows too thick to form wrinkles, the surface breaks into jagged chunks to form the aa lava. Aa lava forms from the same composition as the pahoehoe lava. The texture is different in gas content and in the rate and slope the lava flows in.
Blocky Lava
The blocky lava ha a higher silica content than the aa lava, which means that is more vicious. It's high viscosity causes the cooled lava that is in the surface to break into large chunks, while th hot lava underneath continues to flow.
Pyroclastic Material
The Five Types
Volcanic Dust
Pyroclastic material
Lapilli
Pyroclastic material
Volcanic Bombs
Pyroclastic material