Section 11.3
... Imagine a single plate, moving in one direction on Earth’s surface. One edge of the plate—the divergent boundary—moves away from things. The opposite edge—called the leading edge or convergent boundary bumps into anything in the way. ...
... Imagine a single plate, moving in one direction on Earth’s surface. One edge of the plate—the divergent boundary—moves away from things. The opposite edge—called the leading edge or convergent boundary bumps into anything in the way. ...
Plate Tectonics
... What evidence do we have to support this idea? o Mid-ocean ridges are warmer than surrounding ocean floors o Active volcanoes on ridges, earthquakes on ridges o Mid-ocean ridge rocks are younger than surrounding ocean floor rocks o Mid-ocean ridge volcanoes are younger than volcanoes further away ...
... What evidence do we have to support this idea? o Mid-ocean ridges are warmer than surrounding ocean floors o Active volcanoes on ridges, earthquakes on ridges o Mid-ocean ridge rocks are younger than surrounding ocean floor rocks o Mid-ocean ridge volcanoes are younger than volcanoes further away ...
Year 10 exams: tectonics revision
... is being formed and old crust destroyed. Along the Mid Atlantic Ridge, the plates are being pulled apart and molten rock, or magma, rises up from the mantle and sets hard on the ocean floor. In some places this occurs on land, as in Iceland which sits on the Mid Atlantic Ridge. ...
... is being formed and old crust destroyed. Along the Mid Atlantic Ridge, the plates are being pulled apart and molten rock, or magma, rises up from the mantle and sets hard on the ocean floor. In some places this occurs on land, as in Iceland which sits on the Mid Atlantic Ridge. ...
Lecture 13-15 Notes: Plate Tectonics
... o Lots of geologic action in certain narrow, linear zones on Earth’s surface…maybe that’s where it’s happening (your lab!) o Most active deformation (high mountain ranges, young folds, fault offsets) appears to be occurring at these zones o [We can now image at least the first stage of oceanic crust ...
... o Lots of geologic action in certain narrow, linear zones on Earth’s surface…maybe that’s where it’s happening (your lab!) o Most active deformation (high mountain ranges, young folds, fault offsets) appears to be occurring at these zones o [We can now image at least the first stage of oceanic crust ...
Theory of plate tectonics | sample answer
... in a process called folding. The uplifted land can be called fold mountains and an example is the Himalayas. Areas in which crust is created are called constructive plate boundaries. An example is a mid ocean ridge, deep under the ocean floor where land is created (Mid-Atlantic ridge has occurred du ...
... in a process called folding. The uplifted land can be called fold mountains and an example is the Himalayas. Areas in which crust is created are called constructive plate boundaries. An example is a mid ocean ridge, deep under the ocean floor where land is created (Mid-Atlantic ridge has occurred du ...
The Theory of Tectonic Plates
... “Sub” means below (submarine, subway) Old ocean crust is pushed below the asthenosphere and gets re-melted and recycled. ...
... “Sub” means below (submarine, subway) Old ocean crust is pushed below the asthenosphere and gets re-melted and recycled. ...
Sea Floor Spreading LAB 2017
... Through direct sampling, Hess measured the age of the sea floor and realized that new seafloor has continually been forming over millions of years at the mid-ocean ridges. Hess found that on each side of the ridge, sea floor got older as a person moved away from the ridge towards the continents. The ...
... Through direct sampling, Hess measured the age of the sea floor and realized that new seafloor has continually been forming over millions of years at the mid-ocean ridges. Hess found that on each side of the ridge, sea floor got older as a person moved away from the ridge towards the continents. The ...
Unit 3: Lesson 2: Theory of Plate Tectonics
... Divergent Plate Boundaries Two plates that move away from each other Forms a mid-ocean ridge or rift valley ...
... Divergent Plate Boundaries Two plates that move away from each other Forms a mid-ocean ridge or rift valley ...
The Theory of Tectonic Plates
... Sub means below (submarine, subway) Old ocean crust is pushed below the asthenosphere and gets re-melted and recycled. ...
... Sub means below (submarine, subway) Old ocean crust is pushed below the asthenosphere and gets re-melted and recycled. ...
Where in the World was Lystrosaurus
... 8. Continental drift was not widely accepted when it was first proposed because ____. 1.Wegener couldn’t explain why or how the continents moved 2.continental landmasses were too big to move slowly over Earth’s surface 3.magnetic and sonar data proved that Wegener’s hypothesis was incorrect 4.mantle ...
... 8. Continental drift was not widely accepted when it was first proposed because ____. 1.Wegener couldn’t explain why or how the continents moved 2.continental landmasses were too big to move slowly over Earth’s surface 3.magnetic and sonar data proved that Wegener’s hypothesis was incorrect 4.mantle ...
Continental Margins and Ocean Basins
... Covers about 30% of Earth’s surface Begins at base of continental rise Sedimentation: Passive and turbidity currents Contain abyssal plains, deep sea trenches, and seamounts ...
... Covers about 30% of Earth’s surface Begins at base of continental rise Sedimentation: Passive and turbidity currents Contain abyssal plains, deep sea trenches, and seamounts ...
Oceanic Crust
... • Crustal Plates are moving Away from each other at this boundary. • Most well known is the “Mid Atlantic Ridge” • Largest Geological structure on Earth • Area of sea floor spreading – The Atlantic Ocean is getting bigger. • Can be found on land in the country of Iceland • Definitive Proof of Crusta ...
... • Crustal Plates are moving Away from each other at this boundary. • Most well known is the “Mid Atlantic Ridge” • Largest Geological structure on Earth • Area of sea floor spreading – The Atlantic Ocean is getting bigger. • Can be found on land in the country of Iceland • Definitive Proof of Crusta ...
mid-ocean ridge
... Convection occurs when the heat from Earth’s core causes the mantle material to become hotter. The hotter rock is less dense and rises toward the crust. As it moves further from the core, it cools off, becomes more dense , and sinks back through the mantle. Over and over, the cycle of rising and sin ...
... Convection occurs when the heat from Earth’s core causes the mantle material to become hotter. The hotter rock is less dense and rises toward the crust. As it moves further from the core, it cools off, becomes more dense , and sinks back through the mantle. Over and over, the cycle of rising and sin ...
Chapter 4 Case Studies and Study Guide: Continental Drift and
... mid-ocean ridges (MORs). The seafloor deepens away from MORs, rocks become older, surface heat flux decreases, sediment cover increases. No oceanic rock is older than 200 million years. The symmetric recording of reversals of the magnetic field across mid-ocean ridges provides evidence for seafloor ...
... mid-ocean ridges (MORs). The seafloor deepens away from MORs, rocks become older, surface heat flux decreases, sediment cover increases. No oceanic rock is older than 200 million years. The symmetric recording of reversals of the magnetic field across mid-ocean ridges provides evidence for seafloor ...
Earth Science Chapter 17: Plate Tectonics
... subduction zone is formed when one oceanic plate, which is denser as a result of cooling, descends below another oceanic plate. The process of subduction creates an ocean trench. • In an oceanic-oceanic convergent boundary, water carried into Earth by the subducting plate lowers the melting temperat ...
... subduction zone is formed when one oceanic plate, which is denser as a result of cooling, descends below another oceanic plate. The process of subduction creates an ocean trench. • In an oceanic-oceanic convergent boundary, water carried into Earth by the subducting plate lowers the melting temperat ...
File
... • 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 ocean are found along trenches. • ...
... • 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 ocean are found along trenches. • ...
Constructive Forces Power Point
... b)as a scholar, he collected samples of fossils from all over the world. What he found was that a fossil found on one continent could also be found on another continent usually near the shore . ...
... b)as a scholar, he collected samples of fossils from all over the world. What he found was that a fossil found on one continent could also be found on another continent usually near the shore . ...
From rifting to subduction: the role of inheritance in the Wilson Cycle
... In the models, subduction systematically initiates off-ridge and is controlled by the convergence-induced swelling of the ridge. Geometry and dynamics of the developing off-ridge subduction is controlled by four main factors: (1) the obliquity of the ridge with respect to the convergence direction; ...
... In the models, subduction systematically initiates off-ridge and is controlled by the convergence-induced swelling of the ridge. Geometry and dynamics of the developing off-ridge subduction is controlled by four main factors: (1) the obliquity of the ridge with respect to the convergence direction; ...
Document
... the plates pull away from each other. 2. Convergent boundaries -- where crust is destroyed as one plate dives under another. 3. Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other. 4. Plate boundary zones -- broad belts in which boun ...
... the plates pull away from each other. 2. Convergent boundaries -- where crust is destroyed as one plate dives under another. 3. Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other. 4. Plate boundary zones -- broad belts in which boun ...
NSTA Geology Reading 1 • Plate Tectonics
... ‣ If seafloor is moving, then places and continents must also be moving ‣ When new oceanic crust from at mid-ocean ridges, both the older oceanic crust and the continents riding atop the plates move - Convection Cells - Cause of Plate Motion? ‣ An accepted cause for plate motion is the idea that con ...
... ‣ If seafloor is moving, then places and continents must also be moving ‣ When new oceanic crust from at mid-ocean ridges, both the older oceanic crust and the continents riding atop the plates move - Convection Cells - Cause of Plate Motion? ‣ An accepted cause for plate motion is the idea that con ...
Sample Question Answer (300 Words)
... generally quite different from that of the plate to which they are accreted. It is generally believed that every continent has grown outward by the accumulation of accreted terranes on one or more of its margins. North America is a prominent example. Most of Alaska and much of western Canada and the ...
... generally quite different from that of the plate to which they are accreted. It is generally believed that every continent has grown outward by the accumulation of accreted terranes on one or more of its margins. North America is a prominent example. Most of Alaska and much of western Canada and the ...
plate tectonic study guide
... 10. Match the boundaries with the stresses and faults. --Transform boundary—shearing stress--strike-slip fault --convergent boundary—compression stress—reverse fault --divergent boundary—tension stress—normal fault 11. Name each fault and tell about the hanging walls. --reverse fault—hanging wall go ...
... 10. Match the boundaries with the stresses and faults. --Transform boundary—shearing stress--strike-slip fault --convergent boundary—compression stress—reverse fault --divergent boundary—tension stress—normal fault 11. Name each fault and tell about the hanging walls. --reverse fault—hanging wall go ...
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.