Friday, September 24, 2010

WHAT SIMALIARITIES AND DIFFERENCES WHAT!!!!!!!!!

       As you probably know or don't know is that there are three types of volcanoes not four three but wait there's more you can't just know the three types of volcanoes are you also have to know the similarities,differences and what they are.   

SHIELD VOLCANOES:

A shield volcano is a volcano that is layered with harden basalts. It has a quiet eruptionand is usualy errupting near hawaii.Shield volcanoes are less dangerous then others.
A shield volcano may be described as a volcano with a wide base andwirdsloping sides.
A shield volcano is a volcano with shallow-sloping sides. Shield volcanoes are formed from fluid lava that can travel long distances across slight inclines, resulting in their relatively flat, broad profile. In contrast, steeply sloped stratovolcanoes better match the popular stereotype of a volcano.
Some of the largest volcanoes on earth are shield volcanoes.

This picture below is a picture of a shield volcano.



 
COMPOSITE VOLCANOES:

Stratovolcanoes also known as composite volcanoes are the most explosive and the most deadliest type of volcano. Stratovolcanos are formed by alter.Stratovolcanoes form are quite impressive, snow-capped peaks which are often exceeding 2500m in height, 1000sq.km in surface, and 400km3 in volume. nating layers of lava and rock fragments. This is the reason they are called composite volcanoes. This is usually caused by viscous magma. When very viscous magma rises to the surface, it usually clogs the craterpile, and gas in the craterpipe gets locked up. Therefore, the pressure will increase resulting in an explosive eruption.


  


CINDER CONE VOLCANO:

As you probably know cinder cone volcanoes are the most common type. The reason it is called a cinder cone volcano because it is known for it's cone shaped base. It is formed from volcanic fragments and is very steep sided, although not always extremely tall. They usually  becoming have just one main vent, and can also sometimes form from a vent of a larger volcano, growing a whole new volcano.

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