All About Volcanoes by:KHK
Hello there were are khk and were are to to tell you about volcanos. On this site you will learn about different types of volcanoes and all the volcanoes around the world. There many volcanoes from north to south America and all the other continents.
On this webpage you will learn about
. Volcanoes
. Shield Volcanoes
. Composite Volcanoes
. Cinder-Cone Volcanoes
. Sills
. Dikes
. Volcanic Landforms
. Batholith
. Hot Spot
. Island Arc
. Ring of Fire
. Magma
. Lava
. Caldera
. Volcanoes
. Shield Volcanoes
. Composite Volcanoes
. Cinder-Cone Volcanoes
. Sills
. Dikes
. Volcanic Landforms
. Batholith
. Hot Spot
. Island Arc
. Ring of Fire
. Magma
. Lava
. Caldera
A volcano is a weak spot in the crust where magma comes to the surface. There three different types of volcanoes Shield volcanoes, Composite volcanoes, and Cinder-Cone volcanoes. A Shield volcano is a wide ,gently slopping mountain made of layers of lava and formed by quiet eruptions. A cinder cone volcano is a steep cone shaped hill or mountain made of volcanic ash, cinders, and bombs piled up around a volcanos opening. A composite volcano is a tall cone shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials.
This picture is from http://www.nydailynews.com
When there thin layers of lava that pour out of a vent and harden on top of previous layers then it is a shield volcano. When there is lava flow that gradually builds a wide, gently sloping mountain, it s building a Shield Volcano. Shield Volcanoes come in different varieties. They can be tall or short. They can be fat or skinny.
A Cinder cone volcano is a cone shaped hill or mountain that has thick and stiff lava. These materials may pile up around a vent in a steep cone shaped pile.
A Composite volcano has lava flow that alternates with explosive eruptions of ash, cinder and bombs. Composite volcanoes are tall, cone-shaped mountains in which layers of lava alternate with ash. This turns into a composite volcano.
Sometimes instead of forming mountains, some eruptions of lava may form high, level areas called lava plateaus. First the lava flows through many long cracks in an area. Then thin, runny lava travels before cooling and solidifying. Again and again floods of lava flow on top of earlier floods. After millions of years the layers of lava form high plateaus.
This picture is from http://www.studyblue.com/notes/note/n/volcanoes--volcanic-landforms/deck/2680269
Vocabulary Words That You Should Know!
Caldera- The large hole at the top of a volcano formed when the roof of a volcano's magma chamber collapses.
Volcanic Landforms-vents or fissures in the earth's crust through which gases, molten rock, or lava
lava , molten rock that erupts on the earth's surface,
either on land or under the ocean, by a volcano or through a fissure. It
solidifies into igneous rock that is also called lava.
..... Click the link for more information. , and solid
fragments are discharged
lava , molten rock that erupts on the earth's surface,
either on land or under the ocean, by a volcano or through a fissure. It
solidifies into igneous rock that is also called lava.
..... Click the link for more information. , and solid
fragments are discharged
Dike- A slab of volcanic rock formed when magma forces itself across rock layers.
sill- A slab of volcanic rock formed when magma squeezes between layers of rock.
Volcanic Landform- Vents in the earth's crust through which gases, molten rock, or lava
, molten rock that erupts on the earth's surface,
either on land or under the ocean, by a volcano or through a fissure. It
solidifies into igneous rock that is also called lava.
..... Click the link for more information. , and solid
fragments are discharged
Batholith- A mass of rock formed when a large body of magma cooled inside the crust.
Hot Spot- An area where magma from deep within the mantle melts through the crust above it.
Island Arc- A string of islands formed by volcanoes along a deep ocean trench.
Ring of Fire- A major belt of volcanoes that rings the Pacific ocean.
Magma- The molten mixture of rock-forming substances, gases, and water from the mantle.
lava- Liquid magma that reaches the surface; also the rock formed when liquid lava hardens.