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Types of Volcanoes and Lava

Types of Volcanoes and Lava. Shield volcanoes. Shield volcanoes are very large and have gradual slopes. They look like mountains. Shield volcanoes rarely erupt violently. Their eruptions consist of large lava flows. The lava is smooth and slow moving. Shield volcanoes. Shield volcanoes.

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Types of Volcanoes and Lava

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  1. Types of Volcanoes and Lava

  2. Shield volcanoes • Shield volcanoes are very large and have gradual slopes. They look like mountains. • Shield volcanoes rarely erupt violently. • Their eruptions consist of large lava flows. • The lava is smooth and slow moving.

  3. Shield volcanoes

  4. Shield volcanoes

  5. Shield volcanoes

  6. Composite Volcanoes • Composite volcanoes are large with steep slopes. • The material from these eruptions falls back down on the cone, increasing its size with each eruption.

  7. Composite Volcanoes • Because composite volcanoes are formed from layers of previous eruptions, they have layered interiors. • Thick lava can flow up through fissures on the sides or out the top.

  8. Composite volcanoes • Eruptions of composite volcanoes can be violent spurts of rock and lava chunks, ash or there can be thick lava flowing up through fissures.

  9. Cinder Cone volcanoes • Cinder cone volcanoes are small and steep sloped. • They form when a vent ejects lava/rock and it falls back down.

  10. Cinder Cone Volcanoes • Cinder cone eruptions are usually violent but small. • Cinder cone volcanoes eject blocks of rock and chunky lava.

  11. Cinder Cone Volcanoes

  12. Famous volcanoes • Mt. Etna- Sicily. First recorded volcanic eruption (475 B.C.). Still active. • Vesuvius- Italy. Buried 2000 people ( in Pompeii) in ash in 79 A.D. It is now extinct. • Mauna Loa- Hawaii. The largest volcano in the world. • Mount Saint Helens-Washington State. Had its first eruption in 120 years in 1980. • Krakatau- Indonesia. Eruption in 1883 produced one of the largest explosions ever recorded on Earth.

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