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Plate Tectonics
Plate Tectonics

... Ocean-Ocean Plate Collision • When two oceanic plates collide, one runs over the other which causes it to sink into the mantle forming a subduction zone. • The subducting plate is bent downward to form a very deep depression in the ocean floor called a trench. • The worlds deepest parts of the ocea ...
ch 7 study guide Answers
ch 7 study guide Answers

... A mid-ocean ridge is a mountain chain found on the ocean floor. It is formed at a divergent boundary where plates are separating. The magma is pushing up through the plate boundary causing the plates to move away from each other. The youngest rock is found at the mid-ocean ridge. The rock get older ...
rocks and minerals quiz
rocks and minerals quiz

... 13. Two plates move away from each other at __________ boundaries. (A) divergent (B) lateral (C) convergent (D) transform (E) isostatic 14. Two plates move toward each other __________ boundaries. (A) divergent (B) lateral (C) convergent (D) transform (E) isostatic 15. Two plates slide parallel to e ...
The layers of the Crust
The layers of the Crust

... The outermost layer of the Earth, the Crust, can be divided by its physical properties into the Lithosphere and Asthenosphere. The Lithosphere (stone sphere) is the rigid outer-most layer of the Earth. The Lithosphere is the relatively cool, rigid shell of the Earth that consists of the Crust and th ...
The Earth`s Structure - Geog
The Earth`s Structure - Geog

... Oceanic crust moves towards continental crust. Oceanic crust sinks, and slowly ...
Plate Tectonics - Issaquah Connect
Plate Tectonics - Issaquah Connect

... Folded Mountains Himalayan Mountains ...
Obj. 2.1.1 Layers of the Earth A
Obj. 2.1.1 Layers of the Earth A

... a. Hot material and cold material rises in the mantle b. Hot material sinks and cold material rises in the mantle c. Hot material and cold material sink in the mantle. d. Hot material rises and cold materials sink in the mantle ____15. Scientist state that _______________________ are responsible for ...
rifted margin
rifted margin

... The continent/ocean boundary was created when Pangea rifted apart, creating a transition from continental to oceanic crust through extensional thinning and magmatic emplacement. This type of continental margin has historically been referred to as a “passive” continental margin. The newer and more ap ...
plates - Tanque Verde School District
plates - Tanque Verde School District

... 1. At the subduction zone a deep sea trench is formed where the plate is being forced downwards under the continental plate. 2. Subduction causes rocks to melt, and magma rises to surface to form volcanoes! 3. Examples: Cascades in US, Andes Mountains in South America. ...
Study Guide for layers or earth and plate tectonics 2017
Study Guide for layers or earth and plate tectonics 2017

... 11. What are created because of transform boundary’s? 12. What state (solid, liquid, gas) is the inner and outer core? 13. What layer or part of the Earth causes tectonic plates to move? 14. What causes the tectonic plates to move? 15. What is the name of the strong physical layer of the mantle? 16. ...
Notes - Earth Science Rocks
Notes - Earth Science Rocks

... Subduction boundary- this is when one of the plates plunges under (subducts) the other plate. This occurs between two oceanic plates, or an oceanic and continental plate. The most common characteristic of a subduction boundary is the formation of a deepsea trench. These trenches are the deepest loca ...
Tectonic Plates - Reading packet
Tectonic Plates - Reading packet

... The other forces that act on plates are ridge push, slab pull, and friction. At the MOR, ridge push is in action. The lifting action of mountain formation, gives the new end of a plate a slight push. At the opposite end of the plate, slab pull occurs. Slab pull is similar to a table cloth being tugg ...
Lab 3&4 PowerPoint
Lab 3&4 PowerPoint

... •A volcanic island arc forms on the plate that is not subducted ...
Layers of the Earth and Plate Tectonics
Layers of the Earth and Plate Tectonics

... * Wegener was not taken seriously, because he couldn’t explain the force used to move HUGE continents. *Evidence: a. correlating rock layers & fossil distribution b. continents fit together like a puzzle ...
GEOL107 – GENERAL GEOLOGY – LABORATORY OUTLINE
GEOL107 – GENERAL GEOLOGY – LABORATORY OUTLINE

... III. Divergent plate boundaries, sea-floor spreading and mid-ocean ridges Work Exercise 2.4 (a)-(c) in the Lab Manual Work Exercise 2.5 in the Lab Manual Work Exercise 2.6 (a)-(c) in the Lab Manual Work Exercise 2.7 (b)-(d) in the Lab Manual IV. Convergent plate boundaries, subduction zones and volc ...
Chapter 8 Study Guide – Earthquakes 1. What is an earthquake
Chapter 8 Study Guide – Earthquakes 1. What is an earthquake

... 13. Where are the youngest rocks found on the ocean floor? Where are the oldest rocks found? Youngest –near mid-ocean ridge; oldest – towards the shore (furthest from mid-ocean ridge) 14. What are trenches? Where are they formed? “crack” in the Earth’s crust/lithosphere created when one tectonic pl ...
The Earth
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...  New crust formed at Mid-Atlantic Ridge (hot and less dense) and spreads outward (cools, shrinks and collects sediments) ...
Earth`s Crust
Earth`s Crust

... Divergent Plate boundaries • These boundaries exist where plates are spreading apart. • As plates spread magma wells up from the mantle. • New crust is formed. • Lots of volcanic activity and earthquakes. ...
Forschungszentrum für marine
Forschungszentrum für marine

... Japan. But how exactly did this process begin? As part of the International Ocean Discovery Program, an international science team was able to drill and investigate the origin of a subduction zone for the first time in 2014. The team is now publishing its data in the international scientific journal ...
PlatemarginsL3and4 9.74MB 2017-03-29 12:41:32
PlatemarginsL3and4 9.74MB 2017-03-29 12:41:32

... Deep ocean trenches are found along the seaward edge of destructive margins. They mark where one plate begins to descend beneath another and can reach great depths. E.g. Peru-Chile trench, 8km deep As it is less dense than the surrounding asthenosphere, the molten material begins to rise up through ...
Earth Guided Reading Notes
Earth Guided Reading Notes

... 10. What is Alfred Wegener’s hypothesis about the continents? __________________________________________ ___________________________________________________________________________________________ 11. What did he call the “supercontinent?” ___________________________________ 12. Describe the fossil ...
to Ch. 9 Notes
to Ch. 9 Notes

... 6. convergent boundary: a boundary in which two plates move together 7. transform fault boundary: a boundary in which two plates slide past each other without creating or destroying lithosphere 8. oceanic ridge: a continuous elevated zone on the floor of all major ocean basins and varying in width f ...
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... Wrangellia was transported from 5000 km away in the Southern Hemisphere. ...
theory of plate tectonics
theory of plate tectonics

... a. thin outer shell of earth b. less dense than material below which causes movement of plates = broken into sections 1) have identified 30 so far 2) interact together to create major surface features a) move toward each other and collide b) moving apart c) slide past one another c. composed of gran ...
Name: Date: Pd: __ PLATE TECTONIC WEBQUEST Part A
Name: Date: Pd: __ PLATE TECTONIC WEBQUEST Part A

... 1. What is the location where sinking of a plate occurs is called? ________________________________ 2. The type of convergence -- called by some a very slow "collision" -- that takes place between plates depends on the kind of lithosphere involved. Convergence can occur between what plate combos? a) ...
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Oceanic trench



The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few mm to over ten cm per year. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. Trenches are generally parallel to a volcanic island arc, and about 200 km (120 mi) from a volcanic arc. Oceanic trenches typically extend 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic floor. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench, at a depth of 11,034 m (36,201 ft) below sea level. Oceanic lithosphere moves into trenches at a global rate of about 3 km2/yr.
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