Anatomy of a Volcano.

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Presentation transcript:

Anatomy of a Volcano

Volcano: What Is It? A volcano is a vent in Earth’s surface that magma and gases escape from. There Are Three Types of Volcanoes: Shield Cinder Cone Composite (Stratovolcanoes)

Shield

Cinder Cone

Composite

What Erupts: Magma becomes lava as it reaches the surface. Lava, dust, ash and chunks of material known as pyroclastic material can all erupt from volcanoes.

This diagram shows a composite volcano. Ash Cloud Vent/ Crater Side Vent Lava Flow Conduit Lithosphere Magma Chamber This diagram shows a composite volcano.

Characterizing Volcanoes

1. Mafic - runny, dark colored - forms ocean volcanoes The type of volcano is determined by the type of magma that creates it.   Two Types of Magma: 1. Mafic - runny, dark colored - forms ocean volcanoes - creates quiet eruptions

Types of Mafic Lava Flows: Pahoehoe Aa Blocky

2. Felsic - thick, light colored - forms continental volcanoes - creates explosive eruptions

Felsic lava explodes and throws fragments of rock called pyroclastic material. The material is categorized by its size. Volcanic dust Volcanic ash Lapilli Volcanic bombs Volcanic blocks

Three Types:

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