where tectonic plates are diverging or converging. A mid-oceanic ridge‚ for example the Mid-Atlantic Ridge‚ has examples of volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by convergent tectonic plates coming together. By contrast‚ volcanoes are not usually created where two tectonic plates slide past one another. Volcanoes can also form where there is stretching and thinning of the Earth’s crust in the interiors of plates‚ e.g
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Geology internal Surface feature: Kiwi point quarry rock face Johnsonville Shops Reference: http://maps.google.co.nz/ Ngauranga gorge Kiwi point quarry Reference: http://maps.google.co.nz/ Exposed quarry rock face from the road in Ngauranga gorge (picture 1). Take note that most of the other photos after this are taken of the rocks behind the trees and below it. Outline of kiwi point quarry Roughly 4m The picture to the left is a picture of the bottom of the rock face in
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MODULE E – Planetary Engineering: Mesozoic Tectonics Lesson 17 – Plate Tectonics 101 Introduction - Plate Tectonics = “Grand Unifying Theory” explaining relationships between processes within Earth From Theory of Continental Drift - Alfred Wegener in 1915 The Theory of Plate Tectonics 1) Earth’s surface consists of many lithospheric plates including crust (continental or oceanic) and immediately underlying mantle‚ cold and rigid 2) These plates are presently moving around on Earth’s surface
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the movements of the continents be explained‚ or how do deep ocean trenches affect us? The three main theories that explain how these things work are sea-floor spreading‚ continental drift‚ and plate tectonics. These are the theories that give us explanation as to why the continents move‚ how plate tectonics work‚ etc. These theories were formed by different scientists and with different forms of evidence‚ some scientists used one of the other two theories to support theirs‚ and one theory is even
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“The extent to which tectonic processes represent hazards depends on when and where they are experienced. Discuss” Throughout this essay I will be discussing my view on the extent to which I think tectonic processes represent hazards depending on when and where they are experienced. My view is that the hazards caused by tectonic processes such as volcanoes and earthquakes are very much likely to have a bigger impact socially‚ environmentally and economically depending on where they had occurred
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Most naturally occurring earthquakes are related to the tectonic nature of the Earth. Such earthquakes are called tectonic earthquakes. The Earth’s lithosphere is a patchwork of plates in slow but constant motion caused by the release to space of the heat in the Earth’s mantle and core. The heat causes the rock in the Earth to flow on geological timescales‚ so that the plates move slowly but surely. Plate boundaries lock as the plates move past each other‚ creating frictional stress. When the
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The theory of plate tectonics According to the generally accepted plate-tectonics theory‚ scientists believe that Earth’s surface is broken into a number of shifting slabs or plates‚ which average about 50 miles in thickness. These plates move relative to one another above a hotter‚ deeper‚ more mobile zone at average rates as great as a few inches per year. Most of the world’s active volcanoes are located along or near the boundaries between shifting plates and are called plate-boundary Volcanoes
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a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. In a 40‚000 km (25‚000 mi) horseshoe shape‚ it is associated with a nearly continuous series of oceanic trenches‚ volcanic arcs‚ andvolcanic belts and/or plate movements. The Ring of Fire has 452 volcanoes and is home to over 75% of the world’s active and dormant volcanoes.[1] It is sometimes called the circum-Pacific belt or the circum-Pacific seismic belt. About 90%[2] of the world’s earthquakes and 81%[3] of
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on the project’s importance scale. Contents [hide] 1 Older comments 2 ME AND MY EARTH 3 Moho not mojo 4 2 types of lithosphere 5 Second Figure is not useful and should be replaced or at least deleted 6 Lithosphere part of Tectonic Plate THEORY 7 Formula under oceanic lithosphere 8 Definition of lithosphere asthenosphere boundary Older comments[edit] 168.212.92.5 17:06‚ 21 September 2006 (UTC)well i just wanted to put something on this page so yeah‚ that’s it! LOL! Hi! I never
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The Earth consists of four concentric layers: inner core‚ outer core‚ mantle . mantle: ]. The crust is made up of tectonic plates [tectonic plates: Large areas of the Earth’s crust that move slowly on the upper part of the mantle‚ often colliding and moving away from each other. ]‚ which are in constant motion. Earthquakes and volcanoes are most likely to occur at plate boundaries. 1.1 The structure of the Earth The Earth is made up of four distinct layers: 1. The inner core is in the centre
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