Composite Volcanoes and Shield Volcanoes


	Composite Volcanoes	Shield Volcanoes
	Type of boundaries:Destructive Boundaries Viscous (sticky) lava-blocks up the vent Pressure builds up and the top of the volcanoes are blown off in a large explosion Ash clouds settle in layers on the lava as it cools Steep slopes-the viscous lava cools quickly near to the top creating a cone Made up of alternating layers of lava and ash A pyroclastic flow rather than a lava flow. (pyroclastic flow is a mixture of hot steam, ash, rock and dust)
	Development (Growth & change)	Other information

Type of boundaries:Destructive Boundaries
Viscous (sticky) lava-blocks up the vent
Pressure builds up and the top of the volcanoes are blown off in a large explosion
Ash clouds settle in layers on the lava as it cools
Steep slopes-the viscous lava cools quickly near to the top creating a cone
Made up of alternating layers of lava and ash
A pyroclastic flow rather than a lava flow. (pyroclastic flow is a mixture of hot steam, ash, rock and dust)

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