1 Volcanism, Intrusion and Extrusion of Magma Forms

Posted by Atsumori. Category: Education

Volcanism is all the events related to the magma reaches the Earth's surface out through cracks in the earth's crust or through a canal called the ribbon that central crater or diatrema.

Magma that came to the surface of the earth is called lava. magma can move up because that has a high temperature and contain gases that have enough energy to push help on it. In the lithosphere magma occupies a bag which is called magma chamber. depth of the magma chamber is a cause of differences in the strength of volcanic eruptions that occurred. in general, the deeper magma chamber of the earth's surface, the stronger the resulting explosion. duration of volcanic activity originating from magma is determined by the size of the volume of the magma chamber. magma is what is the main source of volcanism.

Bancuh rocks (mélange is a geological phenomenon which is only found in a few locations in the region of Indonesia, such as in Karangsambung (Central Java), ciletuh (West Java), Bantimala (South Sulawesi) and sea island (South Kalimantan). Rocks of this type is defined as a mixture of rock formation originating from different environments and mixed through a particular mechanism both tectonic and through the process of sedimentation.



Forms of magma intrusion
What is meant by the intrusion of magma into the magma is the inclusion of the rock layers forming the earth's crust (magma does not get out). movement of magma intrusion flat (sill or intrusion plate) is magma that infiltrate between two layers of rocks, horizontal and parallel to the layers. Lakolit is that magma broke through a small layer between the top of the earth. alley (excavation) is the result of intrusion of magma rocks that infiltrate and freezes in between the folds. diatrema is a hole (pipe) between the magma chamber and the volcano crater. 

Forms of magma extrusion
Is a magma intrusion events to reach the earth's surface and forms volcanoes that occur when the gas pressure is strong enough and there are cracks in the earth's crust
magma that came out to the surface of the earth is called the eruption. 

Forms of Eruption  

• Which is a linear eruption magma out through cracks in the earth's crust, forming a row of elongated cone volcano 
• Eruption area is magma that melts at the earth's surface as magma chamber lies very close to the earth's surface with less volcanic craters, forming a very broad 
• The central eruption is mgma who came out through the hole on the surface of the earth and the mountains forming a separate location  

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