AT24-05_Precis_130503 - University of California, Santa Cruz
... Seafloor hydrothermal circulation is… …the passage of warm (or hot) water through rock of the oceanic crust; …generally a result of heating from below, although it can also occur immediately adjacent to newly-erupted magma; …partly responsible for making the ocean "salty"; …thought likely to have o ...
... Seafloor hydrothermal circulation is… …the passage of warm (or hot) water through rock of the oceanic crust; …generally a result of heating from below, although it can also occur immediately adjacent to newly-erupted magma; …partly responsible for making the ocean "salty"; …thought likely to have o ...
AUGURY, Reconstructing Earth`s mantle convection
... ‘recent’ past; however, it does not explain the forces that drive this motion. In contrast, mantle convection theory describes the forces behind the motions within the rocky mantle of the Earth, but fails to reproduce the surface tectonics. In collaboration with Professor Paul Tackley at the Swiss F ...
... ‘recent’ past; however, it does not explain the forces that drive this motion. In contrast, mantle convection theory describes the forces behind the motions within the rocky mantle of the Earth, but fails to reproduce the surface tectonics. In collaboration with Professor Paul Tackley at the Swiss F ...
When did plate tectonics start?
... Oceanic subduction Continental collision, UHPM rocks form (gneisses, eclogites). ...
... Oceanic subduction Continental collision, UHPM rocks form (gneisses, eclogites). ...
Lecture 17
... broken in to mobile “plates” (the crust and uppermost mantle) Beneath the lithosphere is the asthenosphere, a hot, slowly flowing layer of relative weak rock (mantle rock) on which the “plates” float. The lithosphere varies from near 0 km thickness at the mid ocean ridges to ~120 km thick under the ...
... broken in to mobile “plates” (the crust and uppermost mantle) Beneath the lithosphere is the asthenosphere, a hot, slowly flowing layer of relative weak rock (mantle rock) on which the “plates” float. The lithosphere varies from near 0 km thickness at the mid ocean ridges to ~120 km thick under the ...
Unit F791 - Global tectonics - Visually impaired
... issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations, is given to all schools that receive assessment material and is freely available to download ...
... issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations, is given to all schools that receive assessment material and is freely available to download ...
Anyone who has attended elementary school knows Earth is layered
... movement of both continental and oceanic crust via convection currents. Because the mantle is so thick, it has a large temperature difference between where it meets with the core and crust. At its deepest parts, near the core, the temperature can reach 4000 degrees Celsius, while directly under the ...
... movement of both continental and oceanic crust via convection currents. Because the mantle is so thick, it has a large temperature difference between where it meets with the core and crust. At its deepest parts, near the core, the temperature can reach 4000 degrees Celsius, while directly under the ...
Tectonics & Sedimentation
... extensional basin type; if the process continues it will ultimately lead to the development of an ocean basin flanked by passive margins, alternatively an intracratonic basin will form Rift basins consist of a graben or half-graben separated from surrounding horsts by normal faults; they can be fill ...
... extensional basin type; if the process continues it will ultimately lead to the development of an ocean basin flanked by passive margins, alternatively an intracratonic basin will form Rift basins consist of a graben or half-graben separated from surrounding horsts by normal faults; they can be fill ...
Investigations Into The Sources of K and Th Decoupling Across
... of basalt. The second class is a composition from the Antarctic Dry Valleys, where tectonic uplift exposes a granitic pluton [6]. This class represents the igneous composition underlying continental crust on Earth. The 3rd and 4th classes are both derived from mantle hotspots originating from the lo ...
... of basalt. The second class is a composition from the Antarctic Dry Valleys, where tectonic uplift exposes a granitic pluton [6]. This class represents the igneous composition underlying continental crust on Earth. The 3rd and 4th classes are both derived from mantle hotspots originating from the lo ...
Why is there Lithosphere?
... stress is applied. In other words, the rock is not liquid, but it is still able to flow, because it has a plastic texture. The layer of the mantle that is plastic is called the asthenosphere. The top of the asthenosphere lies approximately between 100 and 200 km below the earth’s surface. Geologists ...
... stress is applied. In other words, the rock is not liquid, but it is still able to flow, because it has a plastic texture. The layer of the mantle that is plastic is called the asthenosphere. The top of the asthenosphere lies approximately between 100 and 200 km below the earth’s surface. Geologists ...
Thinning and Accretion of Deep Lithosphere in North China Block
... affinity of the Cenozoic lithospheric mantle beneath this region, and demonstrated that lithospheric accretion must have taken place subsequent to the lithospheric thinning processes. This finding contrasts with the traditional view that the lithosphere beneath cratons is stable forever. After that, ...
... affinity of the Cenozoic lithospheric mantle beneath this region, and demonstrated that lithospheric accretion must have taken place subsequent to the lithospheric thinning processes. This finding contrasts with the traditional view that the lithosphere beneath cratons is stable forever. After that, ...
Ch. 4 Plate Tectonics This is a satellite image of the San Francisco
... the energy released during an earthquake. Seismographs measure seismic waves which can tell the distance and travel times to calculate the density & thickness of each physical layer. ...
... the energy released during an earthquake. Seismographs measure seismic waves which can tell the distance and travel times to calculate the density & thickness of each physical layer. ...
Arc Magmatism Island Arc Magmatism Subduction Products
... • Igneous activity is related to convergent plate situations that result in the subduction of one plate beneath another ...
... • Igneous activity is related to convergent plate situations that result in the subduction of one plate beneath another ...
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 ...
Earth
... The project attempted to drill as deep as possible into the Earth’s crust. Drilling began on 24 May 1970 and in 1989 the hole reached 12 Kilometers (40,230 ft about 7.6miles) and is the deepest hole ever drilled. Drilling ended in 1989 due to lack of funding, which was the same reason why scientists ...
... The project attempted to drill as deep as possible into the Earth’s crust. Drilling began on 24 May 1970 and in 1989 the hole reached 12 Kilometers (40,230 ft about 7.6miles) and is the deepest hole ever drilled. Drilling ended in 1989 due to lack of funding, which was the same reason why scientists ...
Resource from animation found at: http://www.iris.edu/hq/inclass
... In reality, the waters of the Gulf of California hide connecting stair-stepping sea-floor spreading ridges with right-strike slip motion on classic transform faults. This collection of faults and ridges form a continental rift system that is tearing the Pacific Plate apart from the North American Pl ...
... In reality, the waters of the Gulf of California hide connecting stair-stepping sea-floor spreading ridges with right-strike slip motion on classic transform faults. This collection of faults and ridges form a continental rift system that is tearing the Pacific Plate apart from the North American Pl ...
seismic waves - Gordon State College
... • Plates slide past one another and no new lithosphere is created or destroyed • Most transform faults join two segments of a mid-ocean ridge • Transform faults are oriented perpendicular to mid-ocean ridge —Permits plates to move from offset ridge segments ...
... • Plates slide past one another and no new lithosphere is created or destroyed • Most transform faults join two segments of a mid-ocean ridge • Transform faults are oriented perpendicular to mid-ocean ridge —Permits plates to move from offset ridge segments ...
plate tectonics
... Convection currents reach the surface, plates are pushed apart. As the plates move away from each other, part of them are pulled into the Earth’s mantle. ...
... Convection currents reach the surface, plates are pushed apart. As the plates move away from each other, part of them are pulled into the Earth’s mantle. ...
Plate Tectonics Question Bank
... When did the first P-waves arrive at this seismic station? (1) 3 minutes after an earthquake occurred 2,600 km away (2) 5 minutes after an earthquake occurred 2,600 km away (3) 9 minutes after an earthquake occurred 3,500 km away (4) 11 minutes after an earthquake occurred 3,500 km away How many add ...
... When did the first P-waves arrive at this seismic station? (1) 3 minutes after an earthquake occurred 2,600 km away (2) 5 minutes after an earthquake occurred 2,600 km away (3) 9 minutes after an earthquake occurred 3,500 km away (4) 11 minutes after an earthquake occurred 3,500 km away How many add ...
BACKGROUND - Exploration Works
... the plates slide, is called the asthenosphere. In contrast to the crust–mantle-core division, which was based on composition, the lithosphere and asthenosphere are separated based on strength. The lithosphere is strong, rigid rock, while the asthenosphere is a weaker, very viscous fluid. Students ha ...
... the plates slide, is called the asthenosphere. In contrast to the crust–mantle-core division, which was based on composition, the lithosphere and asthenosphere are separated based on strength. The lithosphere is strong, rigid rock, while the asthenosphere is a weaker, very viscous fluid. Students ha ...
Scientific Reasoning 2016 - Indiana University Northwest
... conclusion that deep sea trenches are not found in these areas. 79 or 54.0% of students answered this question correctly. Question 4 assessed students’ ability to define parameters of problem (youngest crust location) and validate explanation of Plate Tectonics Theory (youngest crust occurs in the c ...
... conclusion that deep sea trenches are not found in these areas. 79 or 54.0% of students answered this question correctly. Question 4 assessed students’ ability to define parameters of problem (youngest crust location) and validate explanation of Plate Tectonics Theory (youngest crust occurs in the c ...
Plate tectonics
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός ""pertaining to building"") is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.