Theory of Plate Tectonics
... A geologically active area where tectonic shifts make volcanoes and earthquakes common. Tsunamis may also be caused by underwater landslides or volcanic eruptions. Or by the impact of a large meteorite plunging into an ocean. ...
... A geologically active area where tectonic shifts make volcanoes and earthquakes common. Tsunamis may also be caused by underwater landslides or volcanic eruptions. Or by the impact of a large meteorite plunging into an ocean. ...
10/12/09 Volcanoes and Plate TectonicsCh
... Form when an _________________ plate & a _________________________plate collide. The oceanic plate is subducted under the cont. plate causing it to melt into magma. The magma rises through the continent to form _______________________________. VIII.Hot Spot Volcanoes _______________________________- ...
... Form when an _________________ plate & a _________________________plate collide. The oceanic plate is subducted under the cont. plate causing it to melt into magma. The magma rises through the continent to form _______________________________. VIII.Hot Spot Volcanoes _______________________________- ...
Continental rifting on Earth and Mars - A comparison
... We have investigated whether forces connected to plate movement are necessary to initiate rifting and show that lithosphere scale faulting at the Thaumasia Highland Rift is feasible even in the absence of mantle plumes or tensional plate-boundary forces. Rather, stresses originating from horizontal ...
... We have investigated whether forces connected to plate movement are necessary to initiate rifting and show that lithosphere scale faulting at the Thaumasia Highland Rift is feasible even in the absence of mantle plumes or tensional plate-boundary forces. Rather, stresses originating from horizontal ...
Who developed the theory that the continents were once joined
... A large ancient landmass that was composed of all the continents joined together 7. What do the plates of the lithosphere float on? Describe the properties of this layer. the athenosphere – plastic-like, not rigid 8. What is the rigid layer made of the crust and upper mantle? the lithosphere 9. Disc ...
... A large ancient landmass that was composed of all the continents joined together 7. What do the plates of the lithosphere float on? Describe the properties of this layer. the athenosphere – plastic-like, not rigid 8. What is the rigid layer made of the crust and upper mantle? the lithosphere 9. Disc ...
Physical Geology
... • Igneous Rocks (basalt) are formed at divergent plate boundaries and Mantle Hot Spots. New basaltic, oceanic crust is generated at divergent plate boundaries. • Sedimentary Rocks are formed along active and passive continental margins from sediments shed from continents • Sedimentary Rocks are form ...
... • Igneous Rocks (basalt) are formed at divergent plate boundaries and Mantle Hot Spots. New basaltic, oceanic crust is generated at divergent plate boundaries. • Sedimentary Rocks are formed along active and passive continental margins from sediments shed from continents • Sedimentary Rocks are form ...
CHAPTER 13 THE OCEAN FLOOR
... lithosphere. The accumulation of deformed sediment and scraps of oceanic crust is called an accretionary wedge. D. Deep-Ocean Basins: The portion of sea floor that lies between the continental margin and the oceanic ridge system. It contains deep-ocean trenches, abyssal plains, and broad volcanic pe ...
... lithosphere. The accumulation of deformed sediment and scraps of oceanic crust is called an accretionary wedge. D. Deep-Ocean Basins: The portion of sea floor that lies between the continental margin and the oceanic ridge system. It contains deep-ocean trenches, abyssal plains, and broad volcanic pe ...
Ocean Basins - University of Washington
... a) two continental plates collide, form high mountain ranges e.g., Himalayas b) two ocean plates collide, form island arc and submarine trench e.g., Aleutian Islands, Aleutian Trench c) ocean and continental plates collide, form mountains and trench e.g., Andes and Peru-Chile Trench Subduction occur ...
... a) two continental plates collide, form high mountain ranges e.g., Himalayas b) two ocean plates collide, form island arc and submarine trench e.g., Aleutian Islands, Aleutian Trench c) ocean and continental plates collide, form mountains and trench e.g., Andes and Peru-Chile Trench Subduction occur ...
3. The Earth system
... oceanic lithosphere along plate boundaries called mid-ocean ridges (e.g. the Mid-Atlantic Ridge, Figs. 6 & 7A). The divergence of oceanic plates at mid-ocean ridges and the production of new oceanic crust is a process referred to as sea-floor spreading (average spreading rate of mid-ocean ridges = 5 ...
... oceanic lithosphere along plate boundaries called mid-ocean ridges (e.g. the Mid-Atlantic Ridge, Figs. 6 & 7A). The divergence of oceanic plates at mid-ocean ridges and the production of new oceanic crust is a process referred to as sea-floor spreading (average spreading rate of mid-ocean ridges = 5 ...
volcano - Madison County Schools
... • Where plates push together, the denser plate subducts into the mantle. Some of the sinking plate melts and forms magma. The magma rises and pours out of cracks that forms along the surface. ...
... • Where plates push together, the denser plate subducts into the mantle. Some of the sinking plate melts and forms magma. The magma rises and pours out of cracks that forms along the surface. ...
4.5 The Theory of Plate Tectonics
... What is the magma coming from that is shown erupting through the mid-ocean ridge and the rift valley? Answer: asthenosphere What new process are shown? ...
... What is the magma coming from that is shown erupting through the mid-ocean ridge and the rift valley? Answer: asthenosphere What new process are shown? ...
Divergent Plate Boundaries
... plate, the pull-apart is not vigorous enough to create a clean, single break through the thick plate material. Here the thick continental plate is arched upwards from the convection current's lift, pulled thin by extreme forces and fractured into a rift-shaped structure. As the two plates pull apart ...
... plate, the pull-apart is not vigorous enough to create a clean, single break through the thick plate material. Here the thick continental plate is arched upwards from the convection current's lift, pulled thin by extreme forces and fractured into a rift-shaped structure. As the two plates pull apart ...
Lab 13
... continental plate. The Ocean plate will subduct because it is more dense than the continental plate. 3. Continental – Continental Convergence- Two Continental Plates Collide. Neither plate subducts- they crumple to form the largest mountains in the world. 4. Explain the tectonic process known as sub ...
... continental plate. The Ocean plate will subduct because it is more dense than the continental plate. 3. Continental – Continental Convergence- Two Continental Plates Collide. Neither plate subducts- they crumple to form the largest mountains in the world. 4. Explain the tectonic process known as sub ...
ANSWER - Test Bank 1
... b. Rocks on the continents can be traced through the ocean floor to the other side. c. Anthropologists have found human carvings in Africa that match those in Brazil. d. Glaciers near the mouth of the Amazon River in Brazil carried distinctive rocks into South Africa, demonstrating that those countr ...
... b. Rocks on the continents can be traced through the ocean floor to the other side. c. Anthropologists have found human carvings in Africa that match those in Brazil. d. Glaciers near the mouth of the Amazon River in Brazil carried distinctive rocks into South Africa, demonstrating that those countr ...
A seismic refraction study of the Cocos plate offshore Nicaragua and
... Water budget of subduc?on zones ...
... Water budget of subduc?on zones ...
Continental Drift and Seafloor
... recorded by rocks in strips parallel to ridges. 2. These iron rich rocks point towards magnetic North wherever it is at the time they cool. ...
... recorded by rocks in strips parallel to ridges. 2. These iron rich rocks point towards magnetic North wherever it is at the time they cool. ...
Plate Tectonic Vocabulary Chapter 10 Pages 239-260
... lithosphere is less dense than the continental lithosphere, so it sinks, or __________________________ . ...
... lithosphere is less dense than the continental lithosphere, so it sinks, or __________________________ . ...
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Plate Tectonics [ LPI USRA PPT ]
... 7 Plate teams (one specialist per): North American, South American, Indian, Pacific, ...
... 7 Plate teams (one specialist per): North American, South American, Indian, Pacific, ...
Midterm Exam
... Because they float on the oceans Because they float on Earth’s liquid mantle Because of “trench-pull” and “ridge-push forces” ...
... Because they float on the oceans Because they float on Earth’s liquid mantle Because of “trench-pull” and “ridge-push forces” ...
Crust
... Earth’s crust has a lower temp than its interior. Earthquake, volcano, formation of a trench or subduction ...
... Earth’s crust has a lower temp than its interior. Earthquake, volcano, formation of a trench or subduction ...
Plate Tectonics - Scoil Mhuire Geography
... the edges of plates. Occur where high temps in the mantle produce a rising fountain (plume) of a molten rock known as a hotspot. Hotspots are extremely hot areas deep in the upper mantle (asthenosphere). The magma rises up and pushes through the plate above. This ...
... the edges of plates. Occur where high temps in the mantle produce a rising fountain (plume) of a molten rock known as a hotspot. Hotspots are extremely hot areas deep in the upper mantle (asthenosphere). The magma rises up and pushes through the plate above. This ...
Sum4_Flatslabs
... length vs. time. We concluded that we'll have to believe that he carried out the numeric experiments for long enough time frames to see this leveling off. In addition, there is a big difference between this 300-400 km limit and lengths of flat slab inferred to have underlain such subduction zones as ...
... length vs. time. We concluded that we'll have to believe that he carried out the numeric experiments for long enough time frames to see this leveling off. In addition, there is a big difference between this 300-400 km limit and lengths of flat slab inferred to have underlain such subduction zones as ...
Laboratory Two Supplement: Plate Tectonics
... Deep ocean trenches represent zones of subduction where ocean-floor rock sinks into the mantle. Evidence for this is the distribution of intermediate and deep focus earthquakes. Earthquakes occur only in rigid rock material and not in plastic (solid material capable of flowing under great pressure) ...
... Deep ocean trenches represent zones of subduction where ocean-floor rock sinks into the mantle. Evidence for this is the distribution of intermediate and deep focus earthquakes. Earthquakes occur only in rigid rock material and not in plastic (solid material capable of flowing under great pressure) ...
acting 101 homework check
... • SQUEEZING CAN ALSO BE CALLED THE STRESS OF _______. • A)SHEARING • B)COMPRESSION • C)TENSION ...
... • SQUEEZING CAN ALSO BE CALLED THE STRESS OF _______. • A)SHEARING • B)COMPRESSION • C)TENSION ...
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.