1. There are four eras of Earth’s history they are Precambrian (87.6%)‚ Paleozoic (7.1)%‚ Mesozoic (3.9 %)‚ and Cenozoic (1.4 %) 2. There are four layers and two sub layers. * Inner core is solid metal and made up of nickel and iron * Outer core is made of a liquid molten core of nickel and iron * Mantle is made up of dense and mostly solid silicate rock * Lithosphere is the uppermost layer (100km thick) * Asthenosphere is the layer below the
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The magma has changed a great deal over the years. One example is the silica weight percent peaked at 100‚000 and 200‚000 years and was the lowest in the last eruption. This indicates that Hawaii might have had more felsic lavas and more explosive eruptions 100 and 200 thousand years ago than in 1959. The weight percent of K2O and Na2O of the lava has also fluctuated throughout the years.These changes are the result of the magma changing from andesite rich lava to more basalt rich over time. The
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effort. The secondary effects of the earthquake like the gas leaks and fires killed 3000 people and many businesses were lost in the port. The Kobe earthquake shows that sometimes the wealthier countries can be just as badly affected. The Icelandic volcano‚ Ejajjallajokall‚ affected many people around the world‚ both wealthy and poor. The airspace above much of Europe was closed meaning that a lot of trade with European countries had to be cancelled. In Kenya and Zimbabwe there were mounds of rotting
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eruption began back in July 1990‚ when a magnitude 7.8 earthquake struck a region 100 km northeast of Pinatubo. This shook the earth’s crust beneath the volcano and caused a landslide‚ some local earthquakes and some small steam emissions too. The following year‚ sometime in March‚ villagers of Patal Pinto felt some earthquakes around the volcano. On the 2nd of April the villagers witnessed small explosions
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What forms after volcano eruption and after magma cools? Igneous rock forms when superheated volcanic liquid‚ also called magma‚ cools and thus hardens through a process of crystallization in one of two manners: by cooling and crystallization on the Earth’s surface such as after a volcanic eruption; or by cooling more gradually through a process of rising as it cools through the magma while still below the Earth’s surface. Scientists further classify such rocks based on their mineral characteristics:
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In just the blink of an eye life can go from living with one’s family to be a preserved body that scientists study for knowledge of the past. Pompeii is a small city in Italy located near the coast of the Bay of Naples and Mount Vesuvius. When Mount Vesuvius erupted it nearly effaced Pompeii. However‚ this catastrophe gave scientist an opportunity to study Ancient Roman. The tragic event of Pompeii changed the lives of the civilians. The remains of those who lost their lives were able to be studied
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that scientists and researchers possess the technology to observe and study events that happen on the depths of the ocean floor. This topic relates to the Geology 307 class in various ways. The first of which is plate tectonics. The eruptions of the volcano are a result of plates shifting causing magma to build under the ocean floor. Earthquakes also cause the volcanoes to erupt. Submarine volcanoes also affect the movement of sediment and plankton through the ocean. Submarine volcanism’s importance
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- Magma erupts and cools so quickly that crystallization does not occur - Solidifies into a glass - Massive‚ Dark – Osideon - Bubbly‚ light – Pumice 3. Pyroclastic Materials - fragments of all sizes that are erupted explosively out of a volcano - Ash (<2mm) - Lapilli (2-64mm) - Blocks and Bombs (>64mm) 4. Gaseous Products - compounds bubble out of magma D. Explosivity of Magma 1. Factors Affecting Explosivity a. Gas Content – higher gas content have more explosive eruptions 2. Viscosity
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activity. This option open to the Italians is not an option for LEDC who don’t have the wealth or public education to set up these stations. In Montserrat their where no levels of monitoring at all due to Before 1995 there was no record of the volcano on Montserrat erupting so they thought their was no need so it was an unnecessary cost. In 1995 the eruptions of the Soufriere hills began it eruption which berried a town and eventually killed 20 people in an unexpected pyroclastic flow. Before
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twentieth century? The purpose of this report is to examine the cataclysmic eruption of Mount Pinatubo in June 1991. This volcano is located on the island of Luzon in the Philippines; a mere 90 kilometers (55 miles) northwest of the capital city of Manila (Rosenbu‚ 2010) (see Figure 1). Specifically‚ this report will give a vivid description and information about the volcano. It will discuss a variety of factors related to the eruption such as the consequences and aftermath of the phenomenon. It
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