Deep Magma Body Beneath the Summit and Rift Zones of Kilauea Volcano Kilauea is one of the world’s most active volcanoes. The frequent and gentle eruptions provide a perfect place for volcanic studies. It is believed all the activity is due to magma from a hot spot nearby. The magma fills up in a reservoir two kilometers below the surface until a certain point at which it either explodes out the top‚ or it moves laterally forming dikes. These dikes‚ filled with solidified lava‚ shift leading to
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quiet eruptions of fluid lava followed by explosive eruptions of viscous lava. How is Magma turned into Lava? Extremely high temperature and pressure cause the rock to melt and become liquid rock or magma. When a large body of magma has formed‚ it rises through the denser rock layers toward Earth’s surface. Magma that has reached the surface is called lava. How are volcanoes formed? Volcanoes are formed when magma seeps through cracks in the earth’s crust‚ and slowly builds up into a cone. If there
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Lucky Koritela #23 The Rock Cycle The rock cycle begins when Earth’s plates shift around leaving gaps in between them making a volcano. The magma under Earth’s crust come through the gap and spill out of the volcano. Then the magma (lava) cools down and hardens into igneous rock. As time passes the igneous rock weathers (using substances such as water) away into little chips. After getting smaller‚ erosion (using elements such as wind) transports the little rocks to different places. The deposition
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scenario is associated with mafic magma? a. hot‚ fluid lava that forms a shield volcano b. hot‚ fluid lava that forms a stratovolcano c. an explosive eruption that ejects pyroclastic materials d. cool‚ viscous magma that forms a shield volcano 6. Which scenario is associated with felsic magma? a. hot‚ fluid lava that forms a shield volcano b. basaltic lava that forms a stratovolcano c. an explosive eruption that ejects pyroclastic materials d. cool‚ viscous magma that forms a shield volcano
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study they found that the moon had many magma rocks on the moon. This fact surprised many scientists because space is very cold (as we all know) and magma rocks are formed from extreme heat or pressure. The magma rocks were only found in certain parts of the moon and not in others. So we know that the whole moon was obviously not all formed by magma rocks. There are many hypotheses‚ it is hard to conduct an experiment on something so far away‚ and these magma rocks had a few scientists thinking hard
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the heated magma to go. When the core gives off the heat energy from radioactive decay and compression‚ it excites the electrons of the magma nearby. The atoms of magma will push away from each other as the electrons jump to new energy levels. This makes the magma near the core much more spread out and lighter than the rest of the magma around it. Gravity pulls on the denser magma harder than the lighter magma. So the denser goes down towards the core and forces the lighter magma out of the
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about the main parts of a volcano and it’s origin. The first main part I will tell you about is the magma chamber. A magma chamber is a large pool of molten rock‚ also called magma‚ sitting underneath the Earth’s crust. The magma chamber can be more than three miles below the Earth’s surface and the magma waits there for the pressure and gases to become too much to stay stable. The magma in the magma chamber is less tense than the mantle surrounding it‚ so it moves toward the surface of the Earth through
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Write a 500- to 750-word explanation regarding the role of plate tectonics in the origin of igneous rocks. To begin‚ igneous rocks come from magma‚ and magma is related to plate tectonics. Magmas differ in composition‚ temperature and viscosity. This is a major identifier of igneous rocks‚ is that they were once molten and magma Plate tectonics are the theory that the Earth’s lithosphere‚ which is the outer rigid shell is composed of several different pieces‚ or “plates” that float on a ductile
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(Cas & Wright‚ 1987): * If the erupted magma contains a high percentage (>63%) of silica‚ the lava is called felsic. * Felsic lavas (dacites or rhyolites) tend to be highly viscous (not very fluid) and are erupted as domes or short‚ stubby flows. Viscous lavas tend to formstratovolcanoes or lava domes. Lassen Peak in California is an example of a volcano formed from felsic lava and is actually a large lava dome. * Because siliceous magmas are so viscous‚ they tend to trap volatiles (gases)
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underlying semi-molten mantle. These plates are either continental‚ The North American Plate‚ or oceanic‚ The Nazca Plate. Tectonic plates are powered by convection currents‚ which is the circular movement of magma within the mantle. These currents are powered by the core‚ which heats the magma‚ causing it to rise‚ cool and fall back down. This circular motion causes the plates‚ which float on the mantle‚ to move. The individual plates are separated by fault lines which extend from the surface all
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