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Volcanic Landforms. Landforms From Lava and Ash  Rock and other materials formed from lava create a variety of landforms including shield volcanoes,

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Presentation on theme: "Volcanic Landforms. Landforms From Lava and Ash  Rock and other materials formed from lava create a variety of landforms including shield volcanoes,"— Presentation transcript:

1 Volcanic Landforms

2 Landforms From Lava and Ash  Rock and other materials formed from lava create a variety of landforms including shield volcanoes, composite volcanoes, cinder cone volcanoes, and lava plateaus.

3 Shield Volcanoes  A wide gently sloping mountain made of layers of lava and formed by quiet eruptions.  Shield volcanoes rising from a hot spot on the ocean floor created the Hawaiian Islands.

4 Cinder Cone Volcanoes  A steep cone shaped hill or mountain.  Cinder cone volcanoes occur from pile up of cinders, bombs, and ash from an explosive volcano.

5 Composite Volcano  Tall, cone shaped mountains in which layers of lava alternate with layers of ash.  Examples: Mt. Saint Helens, Mt. Fuji

6 Lava Plateau  High level areas formed from lava  Example: Columbia Plateau Caldera:  A huge hole left by the collapse of a volcanic mountain.  The hole is filled with the pieces of the volcano that have fallen inward as well as some lava and ash.

7 Soils from lava and ash  Soils made from volcanic ash is some of the richest soil in the world.  Volcanic ash breaks down and releases potassium, phosphorus, and other materials that plants need.  People settle near volcanoes to take advantage of the fertile soil.

8 Landforms from Magma  Features formed from magma include: volcanic necks, dikes, and sills, as well as batholiths and dome mountains. Volcanic necks, dikes, and sills:  A neck forms when magma hardens in a volcanoes pipe.  Magma that forces itself across rock layers hardens into a dike.

9  When magma squeezes between layers of rock it is called a sill. Batholiths:  A mass of rock formed when a large body of magma cools inside the crust. Dome Mountains:  Forms when rising magma is blocked by horizontal layers of rock. The magma forces the layers of rock to bend upward into a dome shape


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