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 and interacting
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mostly occur at plate margins. They can also occur at hot spots and in rift valleys. The most active volcanic zone is the Pacific Ring of Fire around the Pacific plate. Here plates are colliding or separating. At active points on these plates volcanic mountains are formed‚ e.g. Nazca Plate and South American Plate‚ where plates separate‚ e.g. Pacific and Nazca Plate and in rift valleys‚ e.g. African Plate‚ Kenya. The most active area on the globe is the western rim of the Pacific Plate - stretching
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Label the major plates onto your map of the world. Include arrows to show the direction each plate is moving. 2. Label the plates using the key below you map. 3. Identify the type of plate margin where the following plates meet (you may have to check your notes to complete this task) | |Collision |Conservative |Destrucitve |Constructive | |North American and the Pacific Plate |
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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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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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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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crust is made up of seven major plates and a number of minor plates. The plates move because of the convection currents in the mantle caused by temperature differences within the mantle‚ leading to volcanoes and earthquakes‚ the world’s major geophysical hazards. The movement of plates due to convection currents results in a variety of types of plate boundary‚ each of which gives rise to particular types of hazards. Constructive boundaries occur where two plates are moving apart. Basalt rises
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rate. New geological features‚ rock formations‚ and locations of plates all rise and demolish some in a lifetime and others over a span of millions of years. Earth is dynamic; it constantly progresses and doesn’t rest. Through the churns and molds‚ the twists and turns‚ Earth is active because of plate tectonics and the rock cycle. The ideas and theories that make up plate tectonics have shown Earth’s dynamism. The position of plates on global maps didn’t always look similar to the maps shown today
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submittals will be given a 10 point deduction for every day of delay. Rules and Regulations: Any Violations of the following rules and regulations is sufficient cause to CANCEL the plate concerned. Cancelled plates can be repeated‚ but NO EXTENSIONS on the specified submission date can be given. a. All plates shall be done on the drawing board. b. The drawing paper must be signed by the instructor before the drawing is started.
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containing all sorts of remarkable creatures. These “geological monsters” are actually capable of producing beautiful habitual islands such as Iceland and the entire Hawaiian chain. Volcanic islands are made possible through their architect‚ plate tectonics; which is a combination of the theory of continental drift‚ by Wegener‚ and seafloor spreading‚ by Hess. Continental drift is the idea that at one point in time all of the continents formed a super continent called Pangea. Looking at the
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