How It Is Connected to Grade 8 Science and What I Learned

• Temperature is an important terminology for hot spot volcano. It can cause the voscosity of the magma different and the movement of lava.

•  As pressure increase, the temperature at which a substance melts will also increase.

• The island volcanoes are formed by a long time of magma filled beyond the sea level.

• Tuzo Wilson is a Canadian geoghysicist who discovrered a theory beyond the hotspot volcanoes.

•  The term "hot spot" is the extremly hot regions under the plates.

•  Hot spot volcanoes had been active for over 10 million years.

• The eruption of hot spot volcanoes is caused by hot spot producing magma from melting the plates.

J. Tuzo Wilson

J. Tuzo Wilson is a Canadian geoghysicist who discovrered a theory beyond the hotspot volcanoes. He had stated that volcanism has been active for a long period of time in a certain locations around the world, such as Hawaii. This could only happen if hotspots existed below the plates that would provide high heat energy to continue the volcanism.  As one island volcano becomes extinct, another develops over the hotspot, and the cycle is repeated. This process of volcano growth and death, over many millions of years, has left a long trail of volcanic islands and seamounts across the Pacific Ocean floor.

                                                                  

        sourced by http://pubs.usgs.gov/gip/dynamic/hotspots.html

                           wikipedia

Temperature

When parts of the plate melt, the magma rises over the volcano, therefore the higher the temperature the more amount of magma is produced. Depending on their composition, the majority of rocks begin to melt at temperatures between 800 and 1200 degrees. Additionally, the temperature, pressure, and water also affect the formation of the magma. For example, high temperature keeps magma movable and the viscosity of the magma.

 

As pressure increases, the temperature at which a substance melts also increases, which explans why most of the rocks in Earth's lower crust and upper mantle do not melt.

Hot Spot

Hot spot volcanoes are filled by anomalously hot mantle. These mantles may be on, near to, or far from tectonic plate boundries. Most of the volcanic eruptions were caused by the movements of the near plate boundries, but an eruption of hot spot volcano is caused by hotspot(hot regions that existed below the plates) melting the plates to produce an amount of magma. An example of hot spot volcano will be the Hawaiian island, it have formed in the middle of Pasific ocean more than 3200km from the nearest plate boundary. After a long period of time of magma rising onto the sea floor, which forms an active seamount, it finally became an island volcano.

In the past 10 million years, more than a hundred hotspots beneath the Earth's crust have been active. Most of these are located under plate interiors (for example, the African Plate), but some occur near diverging plate boundaries. Some are concentrated near the mid-oceanic ridge system, such as beneath Iceland, the Azores, and the Galapagos Islands.

                                                        

Sourced by: Wikipedia, google

                     http://pubs.usgs.gov/gip/dynamic/hotspots.html

                     

Introduction

Welcome to my blog

 

I am now introducing "hotspot volcanoes" to you!