RLAF+3.3

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Volcanic Landforms
Vocab: **shield volcanoes-**lava flows, gradually building a sloping mountain
 * cinder cone-**a steep, cone-shaped hill or mountain
 * composite volcanoes-**tall, cone-shaped hill or mountains
 * caldera-**a volcanic mountain
 * volcanic neck-**forms when magma hardens
 * dike-**magma that is in thick layers
 * sill-**when magma squeezes into thick layers
 * batholith-**a mass of rock formed when magma cools down

Outline

 * Land Forms from Lava and Ash**
 * lava
 * formed from rocks and materials
 * create a variety of land forms
 * Shield Volcanoes**
 * earth's surface
 * thin layers of lava
 * vents
 * lava pours out
 * becomes shield volcanoes
 * Cinder Cone Volcanoes**
 * cinder-cone volcanoes
 * steep, cone-shaped hill
 * Volcanoes
 * stiff
 * produces ash
 * Composite Volcanoes**
 * lava flows alternate
 * layers of ash
 * composite volcanoes
 * Mount Fuji
 * Mount St. Hellens
 * Lava Plateaus**
 * eruptions
 * form high lava plateaus
 * lava
 * floods of lava
 * Calderas**
 * volcano erupts
 * becomes hollow
 * collapse
 * Soils from Lava and Ash**
 * lava
 * breaks down into soil
 * soil develops
 * plants then grow
 * Landforms From Magma**
 * Magma
 * forces its way to cracks
 * magma then hardens into rock
 * Volcanic Necks, Dikes, and Sills**
 * volcanic necks
 * form when magma hardens
 * must harden in volcanoes pipe
 * dikes
 * forms when magma forces itself across layers of rock
 * sill
 * when magma squeezes between layers of rock
 * forms a sill
 * Batholiths**
 * large rock masses
 * called batholiths
 * formed when magma is cool in the crust
 * Dome Mountains**
 * small bodies of magma
 * form dome mountains
 * magma forces rock to bend