The Relationships Between Plate Boundaries and Tectonic Landforms .


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The Connections Between Plate Limits and Tectonic Landforms. The world's surface is secured with an assortment of awesome and fascinating landforms
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The Relationships Between Plate Boundaries and Tectonic Landforms

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The world\'s surface is secured with an assortment of awesome and intriguing landforms… Island circular segments Volcanoes Mountains

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And valleys circumscribed by soak precipices, Just to give some examples!

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How did these landforms begin? How can it identify with our dynamic, evolving earth? … These are inquiries that inquisitive and systematic logical personalities have just truly possessed the capacity to reply in the last 40-50 years!

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Courtesy of pictures from NASA\'s site: "Earth from Space" http://earth.jsc.nasa.gov/land.html We will take a "Virtual Tour" of the Earth to investigate these Tectonic Landscapes and put into "genuine" setting what we have realized in class.

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But initial a survey… A critical current hypothesis about the powers that drive plate tectonics is that the plastic, mostly dissolved asthenosphere is experiencing convection. This development of materials underneath the world\'s lithosphere is thought to bring about the plates of the world\'s lithosphere to move as well!

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As you have realized, where there is upwelling of the asthenosphere, the covering above spreads separated, and new material from underneath lumps up into edges. Where there is subsidence of the asthenosphere, the outside layer is being pulled down alongside it to shape miseries, or trenches. This can be imagined wonderfully in this outline.

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This development of the astheno-circle causes the lithosphere plates to be pulled separated or pushed together! This makes the diverse plate limits, which thus makes the scenes we see on earth today!

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Let\'s survey the 3 sorts of plate limits we have examined so we can better comprehend the photos we are going to see.

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Plate Boundaries 1. Dissimilar : Where pressure powers are pulling the earth\'s plates separated. (where plates move far from each other) Convergent: Where pressure powers push the world\'s plates together (where plates collide with each other) Transform: Where shearing strengths cause the earth\'s plates to slide past each other. (where plates rub against each other in inverse headings)

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How do researchers know where plate limits are, and of what sort? By contemplating where the earth is under anxiety. How do researchers know where the earth is under anxiety? By recognizing where tremors are and how profound they are!

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Shallow seismic tremors are found along disparate, change, and break limits, and where mainland outside layer is impacting. Profound quakes are found along what sort of zones?! *

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O.K.! Enough Review! We should take off and take a gander at some genuine landforms! Our first stops will take us to CONVERGENT limits. Stop 1: Oceanic outside crashing into maritime covering

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COUNTDOWN… . 5 4 3 2 1

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LIFTOFF!!!!

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We will fly over Alaska and the Aleutian Islands What components would it be a good idea for us to search for? Aleutian Islands

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Unimak Island

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Unimak Island

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Turn to page 5 in your Earth Science Reference Tables… What structural element do you see related with the Aleutian Islands?

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Volcanic Island Arcs are related with trenches! Why is this so?!

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What kind of magma would expel from these volcanoes? (See page 6 of your reference tables.)

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Stops 2&3: Oceanic covering crashing into mainland hull

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We will visit the condition of Washington so as to view plate structural components that came about when the Juan de Fuca Plate (maritime outside layer) slammed into the North American Plate (mainland hull.) Based on the guide to one side, and in the following slide, what elements would it be advisable for us to search for?

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Cascade Range, Washington

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Mount Rainier

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Mount Saint Helens

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A comparable circumstance exists in western South America, yet the plates included are distinctive. What plates are included in this impact amongst maritime and mainland hull?

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Now we\'re headed toward Chile and Peru to look at the landforms there! Stop 3: South America

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Chile

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Look at your reference table once more. What include do you see on the west side of South America that is related with focalized limits and the subduction that outcomes? What is presumably occurrence to the asthenosphere here?

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Again, what sort of magma would expel from these volcanoes in Washington State and western South America?

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Stop 4: Continental covering crashing into mainland outside What highlights do we hope to discover here?

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We\'re set for Southeastern Asia, one of the best places to watch this sort of plate limit! China India Nepal

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Himalayas India China

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Mount Everest 29,035 feet tall! (8850 meters)

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Use your reference table to figure out what plates are crashing to shape the Himalayas.

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Now we have achieved the second some portion of our excursion: Stops 5&6: Exploring DIVERGENT limits…

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A flight over piece of Africa\'s Rift Valley will show this.

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First, locate the East African Rift on your reference table and figure out what plate the crack is found on.

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Here are some volcanoes from the Rift Valley. Knowing this is a disparate zone, what sort of magma will expel from them? Soak precipice of fracture valley Lengai Volcano

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And here are some sensational photos of the magma from these volcanoes!

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… And now to clarify how fracturing can frame volcanoes AND substantial lakes…

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The uprising asthenosphere here has created pressure powers which have pulled separated the mainland outside layer. ..what\'s more, magma originating from the spreading focus can frame volcanoes! The weak outside has broken and an area in the center has downfaulted into the creating crevice (break.) Water filled into the hole, making a freshwater lake. There are two dazzling cases of this in Africa!

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Stop 5: Malawi, Africa

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Lake Malawi

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And alongside Tanzania…

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Lake Tanganyika

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And the last some portion of our trip… Stop 7: A TRANSFORM BOUNDARY We\'re still in Africa—Zimbabwe this time!

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Movement that happens along a change limit: Transform

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Where is the confirmation for a change blame around there of Zimbabwe?

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And our last stop… A PASSIVE CONTINETNAL MARGIN

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Greenlawn

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Home Sweet Home!

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In Summary… Wait a moment… I\'m drained from such a lot of circling and being a visit manage… you do it!!! 1. What are the three fundamental plate limits? Portray the development at each. 2. How does each plate limit influence what sort of scene results? Give particular cases for every one! 3. Clarify how the asthenosphere drives plate tectonics.

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