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Transcript
Explosive and Non-Explosive Eruptions Non-explosive • Most common type of eruption • Produce calm flows of lava • Can release large amounts of lava • Produce little ash or dust • Most of the rocks on the ocean floor come from these types of eruptions • Magma from these eruption have less silica • Magma is thinner and runnier Explosive • More destructive than a non-explosive Volcano • Produces hot ash and gas • Rock fragments shoot in the air • Ash from this type of eruption can enter the earths atmosphere and stay there for years • Magma in these eruptions contain a lot of water • Water turns into gas and expands which caused explosion • Magma is packed with silica which causes it to move slow and cause blockages inside the volcano. This cause pressure to build up and make the volcano explosive. • Produces Pyroclastic Material o Hardened magma that is blasted into the air Volcanic Bombs Lapilli Volcanic Ash Volcanic Blocks Types of Lava- Scientist classify lava by the surfaces it forms when cooled. ( smooth, sharp, jagged) • • • • A’a Pahoehoe Blocky Pillow