plate tectonics - Canvas by Instructure
... where two plates separate. • When the seafloor spreads at a midocean ridge, lava erupts, cools, and forms new oceanic crust. • Divergent plate boundaries can also exist in the middle of a continent, where they pull continents apart and form rift valleys. ...
... where two plates separate. • When the seafloor spreads at a midocean ridge, lava erupts, cools, and forms new oceanic crust. • Divergent plate boundaries can also exist in the middle of a continent, where they pull continents apart and form rift valleys. ...
Modelling the initiation of sea floor spreading and formation of rifted
... ridge, rather than pre-breakup intra-continental continental rifting. Simple fluid flow models of ocean ridge processes using analytical iso-viscous corner-flow solutions show that the divergent motion of the upwelling mantle beneath the ocean ridge, when viewed in the reference frame of the young c ...
... ridge, rather than pre-breakup intra-continental continental rifting. Simple fluid flow models of ocean ridge processes using analytical iso-viscous corner-flow solutions show that the divergent motion of the upwelling mantle beneath the ocean ridge, when viewed in the reference frame of the young c ...
Subduction Zone—Plate Interaction
... referring to the zone of complex deformation that is associated with the fault plane. Lithosphere—the outer solid part of the earth, including the crust and uppermost mantle. The lithosphere is about 100 km thick, although its thickness is age dependent (older lithosphere is thicker).The lithosphere ...
... referring to the zone of complex deformation that is associated with the fault plane. Lithosphere—the outer solid part of the earth, including the crust and uppermost mantle. The lithosphere is about 100 km thick, although its thickness is age dependent (older lithosphere is thicker).The lithosphere ...
SEA-FLOOR SPREADING By the early 1960s it was clear that
... ocean, allowed the seafloor to be mapped. Prior to this time, it had been known that there were underwater mountain ranges called "midocean ridges", and very deep regions called trenches, but the overall pattern was unclear. Once a major portion of the ocean floors had been mapped - some striking pa ...
... ocean, allowed the seafloor to be mapped. Prior to this time, it had been known that there were underwater mountain ranges called "midocean ridges", and very deep regions called trenches, but the overall pattern was unclear. Once a major portion of the ocean floors had been mapped - some striking pa ...
Chp. 19 Notes
... http://unit.aist.go.jp/igg/rg/igi-rg/beta/sl-support/R-formation/TurbidityCurrent.jpg ...
... http://unit.aist.go.jp/igg/rg/igi-rg/beta/sl-support/R-formation/TurbidityCurrent.jpg ...
Abstract - gemoc - Macquarie University
... represents a milestone in Earth dynamics as it will have had a profound interaction with, and influence on, plate tectonics. Amalgams of lithospheric blocks form rigid cratons, dictating a minimum plate size, localizing subduction on their margins, and facilitating the transfer of stress during accr ...
... represents a milestone in Earth dynamics as it will have had a profound interaction with, and influence on, plate tectonics. Amalgams of lithospheric blocks form rigid cratons, dictating a minimum plate size, localizing subduction on their margins, and facilitating the transfer of stress during accr ...
Unit 5: Ocean Floor Structure and Plate Tectonics
... 2. convergent – “collide together” - occurs when plates collide, causing volcanoes to erupt from the building pressure 3. transform – “trans = across” - occurs when plates move past each other. Ex. San Andres Fault in California Earthquakes and Tsunamis What is the difference between an earthquake a ...
... 2. convergent – “collide together” - occurs when plates collide, causing volcanoes to erupt from the building pressure 3. transform – “trans = across” - occurs when plates move past each other. Ex. San Andres Fault in California Earthquakes and Tsunamis What is the difference between an earthquake a ...
Expedition Worksheet, if you do not have course workbook
... and Eurasian plates and lies along an underwater volcanic mountain range called the Mid-Atlantic Ridge. This boundary is composed of north-south oriented divergent boundary segments, which are sites where oceanic lithosphere is created by seafloor spreading, and east-west-trending transform segments ...
... and Eurasian plates and lies along an underwater volcanic mountain range called the Mid-Atlantic Ridge. This boundary is composed of north-south oriented divergent boundary segments, which are sites where oceanic lithosphere is created by seafloor spreading, and east-west-trending transform segments ...
Plate Tectonics
... Crustal plates may be classified based on either: (a) their size ( major or minor) (b) their composition (continental or oceanic) Thus a crustal plate may be described using both criteria for classification. Eg major continental; minor continental; major oceanic and major continental. • N.B. Crustal ...
... Crustal plates may be classified based on either: (a) their size ( major or minor) (b) their composition (continental or oceanic) Thus a crustal plate may be described using both criteria for classification. Eg major continental; minor continental; major oceanic and major continental. • N.B. Crustal ...
Fryer (Cont.) - SOEST - University of Hawaii
... a) Tectonic/volcanic segmentation and controls on hydrothermal venting along Earth's fastest seafloor spreading system, EPR 27°-32°S b) ALVIN magnetometer investigations of tectonic windows into superfast spread crust exposed at Pito Deep, Easter Microplate c) Origin of the V-shaped ridges along the ...
... a) Tectonic/volcanic segmentation and controls on hydrothermal venting along Earth's fastest seafloor spreading system, EPR 27°-32°S b) ALVIN magnetometer investigations of tectonic windows into superfast spread crust exposed at Pito Deep, Easter Microplate c) Origin of the V-shaped ridges along the ...
The Mantle and Creation of the Oceanic Crust The Mantle
... The Earth’s mantle is 84% of the volume of the Earth and 68% of its mass. Convection in the mantle drives plate ...
... The Earth’s mantle is 84% of the volume of the Earth and 68% of its mass. Convection in the mantle drives plate ...
Tectonic Plates - princetonrocks
... layers into massive mountains like the Himalayas in Asia, which continues to form as the IndoAustralian and Eurasian plates collide. If two oceanic crusts collide, one slides over the other, forcing the sinking plate downward into the asthenosphere until it melts. This motion, called subduction, can ...
... layers into massive mountains like the Himalayas in Asia, which continues to form as the IndoAustralian and Eurasian plates collide. If two oceanic crusts collide, one slides over the other, forcing the sinking plate downward into the asthenosphere until it melts. This motion, called subduction, can ...
The Theory of Plate Tectonics
... mantle is the major cause of plate motion. Mantle motion is transferred to the lithosphere at its boundary with the asthenosphere. The plates are carried along in much the same way that ice floats on slow-moving water. During subduction, gravity pulls one edge of a plate down into the mantle. The re ...
... mantle is the major cause of plate motion. Mantle motion is transferred to the lithosphere at its boundary with the asthenosphere. The plates are carried along in much the same way that ice floats on slow-moving water. During subduction, gravity pulls one edge of a plate down into the mantle. The re ...
Plate boundaries presentation
... What happens when plates converge or collide? • Continental/Continental = folded mountains (Himalayas). • Continental/Oceanic = volcanoes form (Cascades in Oregon and Washington) • Oceanic/Oceanic = Volcanic arc of islands form(Aleutian Islands in Alaska) ...
... What happens when plates converge or collide? • Continental/Continental = folded mountains (Himalayas). • Continental/Oceanic = volcanoes form (Cascades in Oregon and Washington) • Oceanic/Oceanic = Volcanic arc of islands form(Aleutian Islands in Alaska) ...
Earth Science – Quiz 2
... 31. New oceanic crust and lithosphere are formed at ________. a. divergent boundaries by submarine eruptions and intrusions of rhyolitic magma b. convergent boundaries by submarine eruptions and intrusions of rhyolitic magma c. convergent boundaries by submarine eruptions and intrusions of basaltic ...
... 31. New oceanic crust and lithosphere are formed at ________. a. divergent boundaries by submarine eruptions and intrusions of rhyolitic magma b. convergent boundaries by submarine eruptions and intrusions of rhyolitic magma c. convergent boundaries by submarine eruptions and intrusions of basaltic ...
What They Say in Hong Kong Geography Books and Exam
... places at lower latitudes are subject to a higher linear speed of rotation while the speed of rotation at high latitudes is lower….Places at lower latitudes may have greater lateral force, so the displacement of the fault at low latitudes is greater. What we actually know: The relative plate motion ...
... places at lower latitudes are subject to a higher linear speed of rotation while the speed of rotation at high latitudes is lower….Places at lower latitudes may have greater lateral force, so the displacement of the fault at low latitudes is greater. What we actually know: The relative plate motion ...
On the role of slab pull in the Cenozoic motion of the Pacific plate
... [3] The Pacific plate represents a key site to analyze the different force contributions as it is the fastest plate on Earth and is half bounded by subduction zones. In addition, hot spot tracks record a sharp bend that is likely related to force re-organization. Along the Hawaiian-Emperor chain, th ...
... [3] The Pacific plate represents a key site to analyze the different force contributions as it is the fastest plate on Earth and is half bounded by subduction zones. In addition, hot spot tracks record a sharp bend that is likely related to force re-organization. Along the Hawaiian-Emperor chain, th ...
Background Knowledge – Layers of the Earth 1. List the layers of the
... 7. Compare the plate motion at a trench to the plate motion at a mid-ocean ridge. At a mid ocean ridge, oceanic crust is moving outward to make new oceanic crust. At a trench a collision occurs where oceanic crust is being subducted by continental crust, and the oceanic crust is melted an recycled b ...
... 7. Compare the plate motion at a trench to the plate motion at a mid-ocean ridge. At a mid ocean ridge, oceanic crust is moving outward to make new oceanic crust. At a trench a collision occurs where oceanic crust is being subducted by continental crust, and the oceanic crust is melted an recycled b ...
Editorial - The Journal of Indian Geophysical Union
... another. As they spread apart, magma comes to the surface and becomes new continental crust. As the tectonic plates move away from spreading zones, they collide with one another. In some cases, the edges of two different plates will grind against each other in a horizontal fashion. These areas, call ...
... another. As they spread apart, magma comes to the surface and becomes new continental crust. As the tectonic plates move away from spreading zones, they collide with one another. In some cases, the edges of two different plates will grind against each other in a horizontal fashion. These areas, call ...
Dynamic Earth Assessment Test Results
... 16. Which of the following geologic events can occur at a transform boundary? a. Earthquake b. Mountain formation c. Volcanic eruption d. Rift formation You answered correctly! 17. What is happening at the subduction zone of the Juan de Fuca and North American Plates? a. Plates are sliding past each ...
... 16. Which of the following geologic events can occur at a transform boundary? a. Earthquake b. Mountain formation c. Volcanic eruption d. Rift formation You answered correctly! 17. What is happening at the subduction zone of the Juan de Fuca and North American Plates? a. Plates are sliding past each ...
Afar - Do plumes exist?
... Red Sea and Gulf of Aden spreading: 30-15Ma stage one of rifting between Arabia and Africa creating the Red Sea. 10km rifting 20Ma Main period of extension. ...
... Red Sea and Gulf of Aden spreading: 30-15Ma stage one of rifting between Arabia and Africa creating the Red Sea. 10km rifting 20Ma Main period of extension. ...
chapter home
... Mantle convection, ridge push, and slab pull are hypothetical models for the causes of plate movements. ...
... Mantle convection, ridge push, and slab pull are hypothetical models for the causes of plate movements. ...
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.