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Ch.6, Sec.2 - Effects of Volcanic Eruptions

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Presentation on theme: "Ch.6, Sec.2 - Effects of Volcanic Eruptions"— Presentation transcript:

1 Ch.6, Sec.2 - Effects of Volcanic Eruptions
Volcanic Eruptions & Climate Change - when volcanoes erupt, they can spread enough ash & gases in the atmosphere to block sunlight which can cause global temperatures to drop!

2 Ch.6, Sec. 2 - Effects of Volcanic Eruptions
Different Types of Volcanoes - there are three different types of volcanoes: shield, cinder cone, and composite 1. Shield Volcano: these are built from layers of lava released from repeated nonexplosive eruptions

3 Ch.6, Sec.2 - Effects of Volcanic Eruptions
2. Cinder Cone Volcano: these form from pyroclastic material produced from moderately explosive eruptions and they usually erode quickly over time

4 Ch.6, Sec.2 - Effects of Volcanic Eruptions
3. Composite Volcano: sometimes called stratovolcanoes are formed from explosive & nonexplosive pyroclastic eruptions

5 Ch.6, Sec.2 - Effects of Volcanic Eruptions
Other Types of Volcanic Landforms - volcanic activity can also create three other types of landforms, other than volcanoes: craters, calderas, and lava plateaus crater: a funnel-shaped pit near the top of the central vent of a volcano

6 Ch.6, Sec.2 - Effects of Volcanic Eruptions
caldera: a large, semicircular depression that forms when the magma chamber below a volcano partially empties and causes the ground above to sink

7 Ch.6, Sec.2 - Effects of Volcanic Eruptions
lava plateau: a wide, flat landform that results from repeated nonexplosive eruptions of lava that spread over a large area

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