Wednesday, September 29, 2010
WHAT! VOLCANOS WHAT!!!
The differences between volcanoes that form where plates diverge and volcanoes that form where Earth's plates slide past each other is that when the volcanoes form where the Earth's plates diverge the plates are spreading apart as with the volcanoes that have plates that are sliding past each other that means that they're subducting. As you probably know convergent means that the plates are colliding and divergent means that the plates are spreading apart. You guys probably know that a hot spot is where most volcanoes occur at about 70%. A transform fault boundry is where two plates grind past each other along what are called strike-slip faults. As you probably know is that a continental plate is a plate that collides with another oceanic plate and a continental plate is when a continental collides with another continental plate. A oceanic plate is a plate that collides with another continental plate. As you probably know composite volcanoes are the most explosive type of volcanoes. Cinder cone volcanoes are the most common type. Shield volcanoes are dormant which means that they're non-explosive and gentle. A hotspot is when lava rises in between the plate boundries. Did you know that Cruzo Wilson was the first person to suggest the hotspot theory in 1963. Well I hope that you guys liked my blog and if you are'nt following my blog already than please do. So why don't you check out my video called the volcano song.
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.
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.
Friday, September 17, 2010
Why!! Why are are some volcanoes quiet and violent? Why!!
Hello, if you don't know how some volcanoes could be violent or quiet , then you should read this blog RIGHT NOW! Okay as you probably now that all volcanoes are not all alike. You know that some eruptions are quiet with lava slowly oozing from a vent and that other eruptions are very violent with lava and other materials being hurled hundreds of miles into the air. Gases from within the earth's interior mix with huge quantities of dust and ash and rise into the air as great dark clouds that can be seen from many kilometers away. Explosive eruptions are caused when lava in the vents hardens into rock and steam and lava builds under the rocks.

When the pressure of the steam and new lava becomes great, a violent explosion occurs. When pressure builds up, eruptions occur. Gases and rock shoot up through the opening and spill over or fill the air with lava fragments. Volcanic eruptions have been known to knock down entire forests. An erupting volcano can trigger tsunamis, flashfloods, earthquakes, mudflows and rockfalls. Why won't check out my video called Volcanoes erupting on the Big Island of Hawaii.
When the pressure of the steam and new lava becomes great, a violent explosion occurs. When pressure builds up, eruptions occur. Gases and rock shoot up through the opening and spill over or fill the air with lava fragments. Volcanic eruptions have been known to knock down entire forests. An erupting volcano can trigger tsunamis, flashfloods, earthquakes, mudflows and rockfalls. Why won't check out my video called Volcanoes erupting on the Big Island of Hawaii.
Monday, September 13, 2010
Friday, September 3, 2010
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