Ridge Push - ClassZone
... The molten magma that rises at a mid-ocean ridge is very hot and heats the rocks around it. As the asthenosphere and lithosphere at the ridge are heated, they expand and become elevated above the surrounding sea floor. This elevation produces a slope down and away from the ridge. Because the rock th ...
... The molten magma that rises at a mid-ocean ridge is very hot and heats the rocks around it. As the asthenosphere and lithosphere at the ridge are heated, they expand and become elevated above the surrounding sea floor. This elevation produces a slope down and away from the ridge. Because the rock th ...
Plate tectonics - pams
... subduction where oceanic crust slides under continental crust. The denser ocean crust is pushed downward into the mantle and melts ...
... subduction where oceanic crust slides under continental crust. The denser ocean crust is pushed downward into the mantle and melts ...
(comprised of the continental crust and oceanic crust).
... continental rise, then the continental slope, then the continental shelf. ...
... continental rise, then the continental slope, then the continental shelf. ...
Richard Bailey “How Did Continents Begin?” COLLOQUIUM
... The plate tectonic revolution which began a half century ago solved some of the major puzzles of geology: why most mountains exist, why the ocean floor is so young, why the continents drift. But there are problems which plate tectonics sensu strictu does not solve. Why did a continental collision ma ...
... The plate tectonic revolution which began a half century ago solved some of the major puzzles of geology: why most mountains exist, why the ocean floor is so young, why the continents drift. But there are problems which plate tectonics sensu strictu does not solve. Why did a continental collision ma ...
1-5 Review and Reinforce
... 4. Describe what happens when a. two plates carrying oceanic crust collide, b. two plates carrying continental crust collide, and c. a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent to ...
... 4. Describe what happens when a. two plates carrying oceanic crust collide, b. two plates carrying continental crust collide, and c. a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent to ...
NASC 1100
... part of the mantle) is broken into a dozen plates. The lithosphere gradually turns into the softer asthenosphere (~100 km thick). Most major earthquakes and volcanic eruption occur along plate boundaries. Plate tectonics carries rock from the mantle, transports it across the seafloor, and returns it ...
... part of the mantle) is broken into a dozen plates. The lithosphere gradually turns into the softer asthenosphere (~100 km thick). Most major earthquakes and volcanic eruption occur along plate boundaries. Plate tectonics carries rock from the mantle, transports it across the seafloor, and returns it ...
Plate Tectonics Notes
... -Molten material moves up between the plates and forms new ocean floor, rift valleys, ocean trenches. ...
... -Molten material moves up between the plates and forms new ocean floor, rift valleys, ocean trenches. ...
Handout 2.3-2 Standard 2 Objective 3.a, b, d, and e
... collide at convergent plate boundaries? • C. The oceanic lithosphere subducts beneath the continental lithosphere. ...
... collide at convergent plate boundaries? • C. The oceanic lithosphere subducts beneath the continental lithosphere. ...
Geology of Australia and New Zealand, HWS/UC 2007 2. Plate
... same location, building up thick (and eventually continental) crust. The bottom diagram shows subduction at a continental margin (as in the Andes Mountains). The lithosphere beneath the continent and the continental crust is actually thicker than shown here. Note that the magma is also emplaced at t ...
... same location, building up thick (and eventually continental) crust. The bottom diagram shows subduction at a continental margin (as in the Andes Mountains). The lithosphere beneath the continent and the continental crust is actually thicker than shown here. Note that the magma is also emplaced at t ...
plate boundaries.
... crust, the oceanic crust which is thinner and more _____ than the continental crust, _______ below the continental crust. ...
... crust, the oceanic crust which is thinner and more _____ than the continental crust, _______ below the continental crust. ...
Blank Jeopardy
... into Earth’s crust provide direct evidence about Earth’s interior in the form of ...
... into Earth’s crust provide direct evidence about Earth’s interior in the form of ...
plate tectonics
... sea-floor spreading as clues to a mystery. – How can the two hypotheses be explained? • In the 1960’s, geologists developed a new theory to explain the apparent movement of the continents. • The theory of plate tectonics suggests that Earth’s crust and upper mantle are broken into sections called pl ...
... sea-floor spreading as clues to a mystery. – How can the two hypotheses be explained? • In the 1960’s, geologists developed a new theory to explain the apparent movement of the continents. • The theory of plate tectonics suggests that Earth’s crust and upper mantle are broken into sections called pl ...
Unit 3: Plate Tectonics: Test Review
... 7. How did it prove the existence of Pangaea? The continents which are now in cooler climates, could not have supported the growth of Glossopteris proving the continents must have been in a warmer climate at one time. ...
... 7. How did it prove the existence of Pangaea? The continents which are now in cooler climates, could not have supported the growth of Glossopteris proving the continents must have been in a warmer climate at one time. ...
File
... A. Using a different color, draw what the mountain profile would look like in one erosional half life. Make sure to label the elevation! B. Using a third color, draw what the mountain profile would have looked like in one erosional half life in the past. Make sure to label the elevation! ...
... A. Using a different color, draw what the mountain profile would look like in one erosional half life. Make sure to label the elevation! B. Using a third color, draw what the mountain profile would have looked like in one erosional half life in the past. Make sure to label the elevation! ...
Oceanic Crust
... • 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. – ...
The modern picture of plate tectonics
... getting bigger, then crust must also be destroyed. . . • Oceanic crust is destroyed at subduction zones, where one plate sinks under another. • Subduction zones are marked by trenches and by island arcs. • Examples: Aleutians, Philippines, Japan, Indonesia. (NOT Hawaii!!) ...
... getting bigger, then crust must also be destroyed. . . • Oceanic crust is destroyed at subduction zones, where one plate sinks under another. • Subduction zones are marked by trenches and by island arcs. • Examples: Aleutians, Philippines, Japan, Indonesia. (NOT Hawaii!!) ...
8-2/8-3 lecture PDF
... denser plate into Earth’s mantle creating a ocean trench. • Ocean trenches are deep, underwater troughs. ...
... denser plate into Earth’s mantle creating a ocean trench. • Ocean trenches are deep, underwater troughs. ...
Plate Boundaries, evidence to support Plate Tectonics, Mechanisms
... d. Recorded in rocks as they form at oceanic ridges 1) Record across ocean ridges confirms seafloor spreading 2) new basalt added to ocean floor, equal amounts to edges of plates 3) Paleomagnetic time scale shows rates of spreading a) North Atlantic Ridge is spreading about 2 cm/year b) East Pacific ...
... d. Recorded in rocks as they form at oceanic ridges 1) Record across ocean ridges confirms seafloor spreading 2) new basalt added to ocean floor, equal amounts to edges of plates 3) Paleomagnetic time scale shows rates of spreading a) North Atlantic Ridge is spreading about 2 cm/year b) East Pacific ...
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.