(this is a process that causes friction‚ distortion and horizontal pressure). These rocks can also be formed when rock becomes heated rapidly by the intrusion of a hot molten rock‚ (called magma) and it comes from the earth’s interior. Sometimes‚ metamorphic rocks are formed when rocks are close to some molten magma‚ and so get heated up. Metamorphic rocks arise from the transformation of existing rock types‚ in a process called metamorphism‚ which means‚ "change in form".
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Freshman Year Semester 1 Exam Study Honors Earth Science: Chapter 1: Branches of earth science Astronomy - study of objects beyond earths atmosphere Meteorology - study of air that surrounds the earth~ how air interacts us give us weather Geology- study of the materials that make up the earth and the processes that form and change those materials -4.6 billion Oceanography- study of earths oceans 3/4 Of earths surface * subspecialties are climatology‚ ecology‚ paleontology
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location of this volcano is literally in a place where the continent of Africa is drifting apart(Asish Basu). The chain of the 8 volcanoes ranges to approximately 1‚200 miles. Because the continent is drifting apart‚ magma rises from below to fill the gap in the earth’s surface. The magma that rises to fill this crack crates what is called a bench. Throughout Nyiragongo’s history there have been violent and silent eruptions. Lava exploded from the fissureson the mountain‚ covering half of the city
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viscosity and velocity? The higher the temperature the lower the viscosity which allows it to develop a smooth surface skin‚ but this is quickly broken up by flow of molten lava‚ it creates a rough‚ clinkery surface. The lower the temperature of the magma the higher the viscosity which allows the lava to travel down the slope. In the group the average velocity was 0.91 cm/s . How the “lava” flowed was in a high viscosity and a low velocity because the “lava” was cold. The lava was thick and moved slowly
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Three Main Types of Volcanoes The three main types of volcanoes differ in shape‚ size‚ and make-up; the differences partly result from the different types of eruptions. Volcano Type Volcano Shape Volcano Size Volcano Materials Eruption Type UTAH example Cinder Cone Steep conical hill with straight sides Small less than 300m high cinders Explosive Diamond Cinder Cone‚ Washington County Shield Volcano Very gentle slopes; convex upward (shaped like a warrior’s shield) Large over 10s of kms
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Mount Vesuvius is one of the most notoriously recognized volcanic eruptions known to man to date. As our text states‚ “this famous volcano erupted in the year 79 AD‚ ejecting a huge cauliflower-shaped cloud of ash and debris that rapidly settled to the Earth (Strahler 436).” After doing some outside research on this magnificent volcanic landform‚ I found quite a few things: “Mount Vesuvius is located in Italy‚ near the areas of the Tyrrhenian Sea and the capital of Italy. The volcano also buried
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island and into the ocean on both sides. Boats escaping the harbor saw red magma under the water‚ and sub oceanic power and water lines from the mainland were broken by the eruption. In the initial eruption a curtain of lava 500 feet erupted from the fissure‚ after a few days the eruption was mostly from a single vent‚ with a cinder cone 300 feet tall. The lava flows from the eruption were a viscous slow moving basaltic magma. Average speeds
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heating of the rock‚ and the molten rock’s surface tension. What the scientist found was how some volcanoes function on the inside. In past years‚ volcanologists believed that flowing lava sinks back down and settles after an eruption‚ pressing on the magma below and crushing all of the bubbles‚ which makes pressure build up under the compacted lava. This leaves the lava sitting there...Until it explodes. Pow! This hints at why some volcanoes will go through cycles of flowing and explosive eruptions.
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schists are at the bottom of the canyon in the Inner Gorge. The inner gorge has a significant amount of metamorphic rocks. The gneiss is a metamorphism of an igneous rock but can be from granites or diorites. The gneiss in the Grand Canyon formed from magma rose that had resulted from the collision of plates and spread into the Granite Gorge and cooled to form Zoroaster Granite. It then metamorphosed into gneiss. The Elves Chasm is the oldest rock in the Grand Canyon. It may be a part of older continental
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explosion. Some interesting facts about Mt. Yasur is that it’s most active through late February and April during the wet season. A lot of rain means a higher groundwater level‚ possible allowing water to come into contact with hot rocks around the magma chamber. Three people have been killed over the years because they wandered to lower‚ unsafe areas. Mt Yasur has been called “the lighthouse of the pacific” because the more-or-less continuous Strombolian and volcanic activity since Cook’s first sighting
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