Volcanic Eruptions
Describe Pyroclastic material and lava flow
What is pyroclastic material?
Volcanic ash and dust
Volcanic ash is pyroclastic particles that are less than 2mm in diameter.Volcanic dust is volcanic ash that is less than 0.25mm in diameter.
Lapilli
Lapilli are large rock fragments that are less than 64mm in diameter.
Volcanic Bombs
Volcanic bombs are huge molten clots of lava that turn into rock while spinning through the air.
Volcanic Blocks
Volcanic blocks are huge pieces of solid rock that blast from the vent of the volcano that are the size of a small house.
Volcano Eruption
A volcano erupting pyroclastic materials.
Volcano Parts
Parts of the volcanoe.
Classified Mafic Lava Types
Pahoehoe Lava
A wrinkly volcanic rock.
Aa Lava
Creates sharp volcanic rocks.
Blocky Lava
Forms chunky volcanic rock.
Types of Volcanoes
Shield Volcanoes
Shield volcanoes are volcanic cones that are broad at the base and have gently sloping sides.
Cinder Cones
Cinder Cones are a type of volcano that have very steep slopes.
Composite Volcanoes
Composite volcanoes are made of alternating layer of hardened lava flows and pyroclastic materials.