Stratovolcanoes erupted in western Utah between about 40 to 25 million years ago. At this time, Utah was closer to a continental-oceanic plate boundary where an oceanic plate (Farallon) was subducting underneath the North American continental plate. Stratovolcanoes are found at these types of plate boundaries. Today’s active stratovolcanoes include those in the Cascade Range in Washington, Oregon, and California where an oceanic plate (Juan de Fuca) is subducting underneath the North American continental plate.
http://geology.utah.gov/popular/general-geology/volcanoes/three-main-types-of-volcanoes-and-utah-volcanoes/
Volcano – a vent (opening) at the Earth’s crust through which magma (molten rock) and associated gases erupt. Magma – molten rock beneath the surface of the Earth. Lava – magma that has reached the surface. Cinders – lava fragments about 1 centimeter in diameter.
http://geology.utah.gov/popular/general-geology/volcanoes/three-main-types-of-volcanoes-and-utah-volcanoes/
Some types of volcanoes are easily recognizable and some are not. The Hollywood types are easily recognized. Many are located in populated areas and have well-known names: Vesuvius, Krakatoa, Fujiyama, and Mount St. Helens. These volcanoes are typically tens of miles across and ten thousand or more feet in height.
http://www.cotf.edu/ETE/modules/volcanoes/vtypesvolcan1.html
When magma comes to the surface it is called lava. This type of volcano is called a composite because of the different layers made up of older eruptions. A magma flow between two layers is called a sill and a flow through layers is called a dike.
http://www.kidscosmos.org/mars/kids/kids_volcanoes_types.php
Two examples of Utah’s stratovolcanoes are Mount Belknap in the Tushar Mountains and Monroe Peak on the Sevier Plateau. Because these volcanoes are old and have been extensively eroded, it is difficult to distinguish the original volcano shapes.
http://geology.utah.gov/popular/general-geology/volcanoes/three-main-types-of-volcanoes-and-utah-volcanoes/
Three Main Types of Volcanoes *. The three main types of volcanoes differ in shape, size, and make-up; the differences partly result from the different types of eruptions.
http://geology.utah.gov/popular/general-geology/volcanoes/three-main-types-of-volcanoes-and-utah-volcanoes/
Another easily recognized type of volcano (seen at right) is the cinder cone.. As you might expect from the name, these volcanoes consist almost entirely of loose, grainy cinders and almost no lava. They are small volcanoes, usually only about a mile across and up to about a thousand feet high.
http://www.cotf.edu/ETE/modules/volcanoes/vtypesvolcan1.html
Composite volcanoes are steep-sided volcanoes composed of many layers of volcanic rocks, usually made from high-viscosity (thick like honey) lava, ash and rock debris (broken pieces). Mt. Rainier (right), Mount St. Helens and Mt. Shasta in California are examples of this type of volcano.
http://www.kidscosmos.org/mars/kids/kids_volcanoes_types.php
Mauna Loa, a shield volcano on the big island of Hawaii, is the largest single mountain in the world, rising over 30,000 feet above the ocean floor and reaching almost 100 miles across at its base. Shield volcanoes have low slopes and consist almost entirely of frozen lavas.
http://www.cotf.edu/ETE/modules/volcanoes/vtypesvolcan1.html
The Four Types of Volcanoes. Volcanoes are grouped into cinder cones, composite volcanoes, shield volcanoes and lava domes. Cinder cones are circular or oval cones (left) made up of small fragments of lava from a single vent that have been blown into the air, cooled and fallen around the vent.
http://www.kidscosmos.org/mars/kids/kids_volcanoes_types.php
what types of volcanoes
Cinder cones, composite volcanoes, shield volcanoes and lava domes are different types of volcanoes. The types of volcanoes are cinder cones, composite volcanoes, shield volcanoes and lava domes.