Volcanic Landforms

Landforms From Lava and Ash  Rock and other materials formed from lava create a variety of landforms including __________________, __________________, _________________, and ___________________.

Shield Volcanoes  A wide gently sloping _____________ made of layers of lava and formed by ______________.  Shield volcanoes rising from a hot spot on the ocean floor created the __________ ___________.

Cinder Cone Volcanoes  A steep _________ ____________ hill or mountain.  Cinder cone volcanoes occur from pile up of _____________, ____________, and _____________ from an explosive volcano.

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

Lava Plateau  High level areas formed from lava  Example: Columbia Plateau Caldera:  A huge hole left by the _____________ of a _______________ mountain.  The hole is filled with the __________ of the ____________ that have fallen inward as well as some __________ and ___________.

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 _______________, ______________, and other materials that plants need.  People settle near volcanoes to take advantage of the ___________ ___________.

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 ____________ __________.  Magma that forces itself across ____________ ___________ hardens into a dike.

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