Assessment 3.2 – Plate Tectonics
... 2. Any one of the internally rigid crustal blocks of the lithosphere which move horizontally across the Earth’s surface relative to one another is known as a. Tectonic Plates b. Asthenosphere c. Outer Core d. Inner Core 3. Tectonic plates that are not moving directly toward or directly away from eac ...
... 2. Any one of the internally rigid crustal blocks of the lithosphere which move horizontally across the Earth’s surface relative to one another is known as a. Tectonic Plates b. Asthenosphere c. Outer Core d. Inner Core 3. Tectonic plates that are not moving directly toward or directly away from eac ...
Continental growth spurts were all before 1 Ga
... Continents; the missing link The lower crust is transient It is recycled 6 times faster than upper crust Recent arc growth estimates are 5X previous estimates! Therefore, a huge previously unaccounted for flux ...
... Continents; the missing link The lower crust is transient It is recycled 6 times faster than upper crust Recent arc growth estimates are 5X previous estimates! Therefore, a huge previously unaccounted for flux ...
Chapter 4
... mantle material • Volcanoes can form over them (Hawaiian Island chain) • Originate at great depth, perhaps at the mantle-core boundary • Since plate moves, but plume does not, it allows us to measure rate of plate motion. ...
... mantle material • Volcanoes can form over them (Hawaiian Island chain) • Originate at great depth, perhaps at the mantle-core boundary • Since plate moves, but plume does not, it allows us to measure rate of plate motion. ...
Plate Tectonics Chapter Challenge sample
... Island arc volcanoes and ocean trenches form at the edge of the continental plate. ...
... Island arc volcanoes and ocean trenches form at the edge of the continental plate. ...
Kump_Ch07_TH - Camosun College
... • Thick fill or unconsolidated sediment amplifies ground motion due to surface waves: local geology & proximity both affect amplitude • More ground motion, more & infrastructure building damage ...
... • Thick fill or unconsolidated sediment amplifies ground motion due to surface waves: local geology & proximity both affect amplitude • More ground motion, more & infrastructure building damage ...
Extreme Trapping O
... a steam auger to cut a hole in the ice scale, the chemical reactions at work and then lower first the anchor, a on settling particles. Nozaki’s work current meter, and the sediment Yoshi Nozaki of the University of Tokyo poses with one of the traps he sends nearly nine kilometers deep. also concerns ...
... a steam auger to cut a hole in the ice scale, the chemical reactions at work and then lower first the anchor, a on settling particles. Nozaki’s work current meter, and the sediment Yoshi Nozaki of the University of Tokyo poses with one of the traps he sends nearly nine kilometers deep. also concerns ...
Introduction to Earth System
... The outermost layer (LITHOSPHERE) is divided in a small number of “rigid” plates in relative motion one respect to the other and that are moving on a weak ASTHENOSPHERE Basic Assumptions: The astenosphere viscosity is low enough to allow on long time scale for viscous flow; The generation of new ...
... The outermost layer (LITHOSPHERE) is divided in a small number of “rigid” plates in relative motion one respect to the other and that are moving on a weak ASTHENOSPHERE Basic Assumptions: The astenosphere viscosity is low enough to allow on long time scale for viscous flow; The generation of new ...
Gravity Summary - uni
... The outermost layer (LITHOSPHERE) is divided in a small number of “rigid” plates in relative motion one respect to the other and that are moving on a weak ASTHENOSPHERE Basic Assumptions: The astenosphere viscosity is low enough to allow on long time scale for viscous flow; The generation of new p ...
... The outermost layer (LITHOSPHERE) is divided in a small number of “rigid” plates in relative motion one respect to the other and that are moving on a weak ASTHENOSPHERE Basic Assumptions: The astenosphere viscosity is low enough to allow on long time scale for viscous flow; The generation of new p ...
PDF handout
... Rule of thumb: on average, lithospheric plates move at about the rate that your fingernails grow (about 5 cm/yr). Plate boundaries Divergent: plates move apart (e.g. down centre of Atlantic, and in south Pacific) Convergent: plates pushed toward one another (e.g. on west side of S. America) ...
... Rule of thumb: on average, lithospheric plates move at about the rate that your fingernails grow (about 5 cm/yr). Plate boundaries Divergent: plates move apart (e.g. down centre of Atlantic, and in south Pacific) Convergent: plates pushed toward one another (e.g. on west side of S. America) ...
Chapter 7 Summary Review
... by which new oceanic crust forms along a mid-ocean ridge as older oceanic crust moves away from the ridge? A. continental drift B. plate tectonics C. seafloor spreading ...
... by which new oceanic crust forms along a mid-ocean ridge as older oceanic crust moves away from the ridge? A. continental drift B. plate tectonics C. seafloor spreading ...
Tectonic Plates
... • Oceanic + Con1nental = oceanic plate sinks beneath the con8nental plate; called subduc1on • Oceanic + Oceanic = the denser plate dives under the other and returns to the mantle; magma rises forming volcanoes ...
... • Oceanic + Con1nental = oceanic plate sinks beneath the con8nental plate; called subduc1on • Oceanic + Oceanic = the denser plate dives under the other and returns to the mantle; magma rises forming volcanoes ...
History of the Earth and its structure
... Active Margins are regions where the continental margins are highly active with volcano and earthquakes. They are identified by little to no shelf and a steep slope ending in a trench, no rise. ...
... Active Margins are regions where the continental margins are highly active with volcano and earthquakes. They are identified by little to no shelf and a steep slope ending in a trench, no rise. ...
12.13-plate-tectonics
... 2. C- subduction is one plate passing under another 3. B- Hawaii was formed at a hot spot (a weakness in the pacific ocean plate where magma was allowed to leak out) 4. B- see whiteboard 5. E- metamorphic rock is formed at high temp/pressure 6. C- earthquakes occur mostly at transform boundaries ...
... 2. C- subduction is one plate passing under another 3. B- Hawaii was formed at a hot spot (a weakness in the pacific ocean plate where magma was allowed to leak out) 4. B- see whiteboard 5. E- metamorphic rock is formed at high temp/pressure 6. C- earthquakes occur mostly at transform boundaries ...
Plate Tectonics PPT 13-14
... • There are three types of convergent boundaries: 1) Oceanic-to-Continental 2) Oceanic-to-Oceanic 3) Continental-to-Continental ...
... • There are three types of convergent boundaries: 1) Oceanic-to-Continental 2) Oceanic-to-Oceanic 3) Continental-to-Continental ...
File
... Oceanic-continental convergence Ocean plate subducted Continental arc Oceanic trench Deep earthquakes ...
... Oceanic-continental convergence Ocean plate subducted Continental arc Oceanic trench Deep earthquakes ...
Layers of the Earth
... • Crust-Like the shell of an egg is very thin (roughly 5km thick). Mostly Silica and Oxygen. Very brittle. • Continental crust is thick. Made of granite. • Oceanic crust is thin. Made of basalt. ...
... • Crust-Like the shell of an egg is very thin (roughly 5km thick). Mostly Silica and Oxygen. Very brittle. • Continental crust is thick. Made of granite. • Oceanic crust is thin. Made of basalt. ...
Crust - SharpSchool
... Geology: rocks from Brazil match those of Western Africa, Limestone of Appalachian mountains matches Scotland’s highlands ...
... Geology: rocks from Brazil match those of Western Africa, Limestone of Appalachian mountains matches Scotland’s highlands ...
Sea-Floor Spreading
... canyons are deep-ocean trenches. Subduction is the process by which the ocean floor sinks beneath a deepocean trench and back into the mantle. ...
... canyons are deep-ocean trenches. Subduction is the process by which the ocean floor sinks beneath a deepocean trench and back into the mantle. ...
Plate tectonics in the Andes
... Magmatism occurs in the subduction zone as the oceanic crust is subducted underneath the continental crust. Seawater is subducted along with the crust and lowers the melting point of the rocks as well as changing the chemistry. At a particular depth (shown by the yellow dotted line in the figure ab ...
... Magmatism occurs in the subduction zone as the oceanic crust is subducted underneath the continental crust. Seawater is subducted along with the crust and lowers the melting point of the rocks as well as changing the chemistry. At a particular depth (shown by the yellow dotted line in the figure ab ...
Notes : Motion of the Lithosphere
... dense) material flows away and sinks into the mantle to replace the rising material • As the material moves, it drags the overlying ...
... dense) material flows away and sinks into the mantle to replace the rising material • As the material moves, it drags the overlying ...
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.