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Volcanic Materials

Lava molten magma that is erupted from a volcano
Pyroclastic material airborne debris that erupts from a volcano
Volcanic Gases gases erupted from a volcano
Basic Lava Lava low in silica, more runny, low viscosity and flows far from the vent. Forms large gently spreading landforms
Acidic Lava High Silica content causing it to be much more viscous. this causes gases to be trapped within causing explosive eruption. Produces landforms with steeper sides.
Aa type of basic lava which is more stony, blocky and more viscous,
Pahoehoe type of basic lava that is runny and ropey less viscous than Aa.
Pyroclastic flow A mixture of dry rock fragments and hot gases that flow down the hurricane flanks at hurricane force speeds.
Pyroclastic cloud dust and ash that are blasted high into the sky during an eruption that can remain there for a long time and can be transported across the globe with winds.
Types of Volcanic Gases Water vapor (harmless) - carbon dioxide, sulfur dioxide or chlorine eg) Cameroon 1986 gas eruption killed all animals and livestock within a 25km radius
Lahar A type of volcanic mudflow caused when volcanic ash mixes with water from melted snow / glacier forming a thick mud. This can flow down mountains at high speeds
Created by: serrraphina
Popular Geography sets




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