SEA FLOOR SPREADING Mid
... ocean floor sinks beneath a deep-ocean trench and back into the mantle. ...
... ocean floor sinks beneath a deep-ocean trench and back into the mantle. ...
Earthquakes are concentrated along oceanic ridges, transform faults
... Earthquakes are concentrated along oceanic ridges, transform faults, trenches and island arcs ...
... Earthquakes are concentrated along oceanic ridges, transform faults, trenches and island arcs ...
2. The youngest rocks on the ocean floor are typically located near
... 2. The youngest rocks on the ocean floor are typically located near what feature? a mid-ocean ridge ...
... 2. The youngest rocks on the ocean floor are typically located near what feature? a mid-ocean ridge ...
Theory of Plate Tectonics
... – In a process called slab pull, the weight of a subducting plate helps pull the trailing lithosphere into the subduction zone. – In the mantle ridge push is thought to push an oceanic plate toward the trench formed at the subduction zone. ...
... – In a process called slab pull, the weight of a subducting plate helps pull the trailing lithosphere into the subduction zone. – In the mantle ridge push is thought to push an oceanic plate toward the trench formed at the subduction zone. ...
Plate Tectonics
... is made and no rock is destroyed so they are called conservative boundaries. Transform faults are huge fractures which run down through the lithospheres, at times the fault "locks", the two plates become stuck and energy builds up. Eventually the plates move again, releasing the built up energy as a ...
... is made and no rock is destroyed so they are called conservative boundaries. Transform faults are huge fractures which run down through the lithospheres, at times the fault "locks", the two plates become stuck and energy builds up. Eventually the plates move again, releasing the built up energy as a ...
Review
... 17. What does the presence of an ophiolite in a mountain belt indicate about its orogenic history? 18. What are the typical zones of a mountain chain? 19. Why does continental crust not subduct? 20. When and how did Earth and its moon come into being? 21. Where did Archean rocks form, and what is th ...
... 17. What does the presence of an ophiolite in a mountain belt indicate about its orogenic history? 18. What are the typical zones of a mountain chain? 19. Why does continental crust not subduct? 20. When and how did Earth and its moon come into being? 21. Where did Archean rocks form, and what is th ...
plate tectonics
... Why do plates move? • The upper mantle and crust (lithosphere) lie on the lower mantle which is fluid. The rocks in the lower mantle (asthenosphere) move in a fluid manner because of the high temperatures and pressures in it. • Currents in the lower mantle form convection cells which cause the plate ...
... Why do plates move? • The upper mantle and crust (lithosphere) lie on the lower mantle which is fluid. The rocks in the lower mantle (asthenosphere) move in a fluid manner because of the high temperatures and pressures in it. • Currents in the lower mantle form convection cells which cause the plate ...
divergent boundary. Results in volcanos and seafloor spreading
... Plate Tectonics Plate tectonics is the theory that Earth’s lithosphere is divided into plates that move around on top of the asthenosphere. ...
... Plate Tectonics Plate tectonics is the theory that Earth’s lithosphere is divided into plates that move around on top of the asthenosphere. ...
john_baross_geoscience_definitionsx
... Crust: Surface layer of the earth, about 35 km thick in continental regions and of sialic (Si and Al rich) character, including granitoids, metamorphic rocks and sediments; and about 8 km thick in oceanic regions, where it is composed of basalts, gabbros and cumulate rocks, overlain by sediment. EMO ...
... Crust: Surface layer of the earth, about 35 km thick in continental regions and of sialic (Si and Al rich) character, including granitoids, metamorphic rocks and sediments; and about 8 km thick in oceanic regions, where it is composed of basalts, gabbros and cumulate rocks, overlain by sediment. EMO ...
Layers of the Earth, Continental Drift, and Plate Tectonic Overview
... 1. What is the difference between continental and oceanic crust? 2. How is the lithosphere different from the asthenosphere? 3. How do scientists know about the structure of the Earth's interior? Explain. 4. Explain the difference between the crust and the lithosphere. 5. List three puzzling occurre ...
... 1. What is the difference between continental and oceanic crust? 2. How is the lithosphere different from the asthenosphere? 3. How do scientists know about the structure of the Earth's interior? Explain. 4. Explain the difference between the crust and the lithosphere. 5. List three puzzling occurre ...
Key topics today: How do we know about the Earth`s interior structure?
... determine ages (K/Ar) • Once known at one site, can extrapolate to other sites • Basis for magnetostratgraphy ...
... determine ages (K/Ar) • Once known at one site, can extrapolate to other sites • Basis for magnetostratgraphy ...
Unit 6: Geology: Plate Tectonics Tectonic Plate Movement
... How would the behavior of two plates that are said to be along a convergent boundary best be described? Can you visibly watch the motion of two plates colliding into one another. If so, how? If not, why? What are the three possible types of convergences that can occur when two tectonics plate collid ...
... How would the behavior of two plates that are said to be along a convergent boundary best be described? Can you visibly watch the motion of two plates colliding into one another. If so, how? If not, why? What are the three possible types of convergences that can occur when two tectonics plate collid ...
La subducción en México central- sismología, tectónica y vulcanología
... It is generally accepted that dehydration of subducting lithosphere transport fluids into the mantle wedge, strongly affecting the rheology and mechanical coupling. There are several sources of fluids in subduction zones, from altered oceanic crust and lithosphere to subducted pelagic sediments. The ...
... It is generally accepted that dehydration of subducting lithosphere transport fluids into the mantle wedge, strongly affecting the rheology and mechanical coupling. There are several sources of fluids in subduction zones, from altered oceanic crust and lithosphere to subducted pelagic sediments. The ...
Geosphere PowerPoint
... Oceanic Plate and Continental Plate - When a thin, dense oceanic plate collides with a relatively light, thick continental plate, the oceanic plate is forced under : SUBDUCTION! Two Oceanic Plates – One is pushed under the other and magma from the mantle rises, forming volcanoes in the vicinity. ...
... Oceanic Plate and Continental Plate - When a thin, dense oceanic plate collides with a relatively light, thick continental plate, the oceanic plate is forced under : SUBDUCTION! Two Oceanic Plates – One is pushed under the other and magma from the mantle rises, forming volcanoes in the vicinity. ...
Outer Core - Wikispaces
... found around the rim of the Atlantic Ocean are not plate boundaries have little or no seismic or volcanic activity form when a continent rifts apart creating a new ocean basin between the fragments. ...
... found around the rim of the Atlantic Ocean are not plate boundaries have little or no seismic or volcanic activity form when a continent rifts apart creating a new ocean basin between the fragments. ...
faults_heating
... Off the coast of South America along the Peru-Chile trench, the oceanic Nazca Plate is pushing into and being subducted under the continental part of the South American Plate. The South American Plate is being lifted up, creating the towering Andes mountains. Strong, destructive earthquakes and the ...
... Off the coast of South America along the Peru-Chile trench, the oceanic Nazca Plate is pushing into and being subducted under the continental part of the South American Plate. The South American Plate is being lifted up, creating the towering Andes mountains. Strong, destructive earthquakes and the ...
Grade 6 Chapter 1 Study Guide
... Understand that in the sea-floor spreading theory, the sea floor continuously spreads apart on both sides of a mid-ocean ridge as new crust is added from molten material coming up from the mantle, and this is what moves the continents. Be able to list the three sources of evidence that Henry Hes ...
... Understand that in the sea-floor spreading theory, the sea floor continuously spreads apart on both sides of a mid-ocean ridge as new crust is added from molten material coming up from the mantle, and this is what moves the continents. Be able to list the three sources of evidence that Henry Hes ...
File
... Why is molten magma rising to the surface at divergent plate boundaries? A. because it is more dense than the hotter rock around it B. because it is affected by anti-gravity C. because it is less dense than the cooler rock surrounding ...
... Why is molten magma rising to the surface at divergent plate boundaries? A. because it is more dense than the hotter rock around it B. because it is affected by anti-gravity C. because it is less dense than the cooler rock surrounding ...
8th Grade Earth Science
... • When a tectonic plate with continental crust crashes into a tectonic plate with oceanic crust, the oceanic plate slides under the continental plate. • The region where oceanic lithosphere sinks into Asthenosphere is called a subduction zone. ...
... • When a tectonic plate with continental crust crashes into a tectonic plate with oceanic crust, the oceanic plate slides under the continental plate. • The region where oceanic lithosphere sinks into Asthenosphere is called a subduction zone. ...
Earth Systems & Resources
... • 1963 – J. Tuzo Wilson proposed “Theory of Sea Floor Spreading” based on ocean floor evidence. • 1965 – J. Tuzo Wilson & Harry Hess proposed “Theory of Plate Tectonics”. Combined both Continental Drift & Seafloor Spreading theories and their collective evidence. ...
... • 1963 – J. Tuzo Wilson proposed “Theory of Sea Floor Spreading” based on ocean floor evidence. • 1965 – J. Tuzo Wilson & Harry Hess proposed “Theory of Plate Tectonics”. Combined both Continental Drift & Seafloor Spreading theories and their collective evidence. ...
Lecture 2.5 - St. Mark`s Boise
... • Some plates are entirely oceanic crust or entirely continental crust while others are a combination of oceanic and continental crust ...
... • Some plates are entirely oceanic crust or entirely continental crust while others are a combination of oceanic and continental crust ...
The Seafloor Lesson 4
... depressions (trenches) The deepest point is the Marianas Trench in the Pacific Ocean Continental and Oceanic are the two types of the crust The submerged parts of the continents. Shallowest part of oceans ...
... depressions (trenches) The deepest point is the Marianas Trench in the Pacific Ocean Continental and Oceanic are the two types of the crust The submerged parts of the continents. Shallowest part of oceans ...
PLATE TECTONICS
... Cascades; the Alps; the Río Grande Rift; the East African Rift; the Appalachian Mountains; the Gulf of Mexico, the Atlantic Ocean, the Pacific Ocean, the Indian Ocean, the Mediterranean Sea. ...
... Cascades; the Alps; the Río Grande Rift; the East African Rift; the Appalachian Mountains; the Gulf of Mexico, the Atlantic Ocean, the Pacific Ocean, the Indian Ocean, the Mediterranean Sea. ...
Plate tectonics
... • “In plate tectonics, a divergent boundary or divergent plate boundary (also known as a constructive boundary or an extensional boundary) is a linear feature that exists between two tectonic plates that are moving away from each other.” ...
... • “In plate tectonics, a divergent boundary or divergent plate boundary (also known as a constructive boundary or an extensional boundary) is a linear feature that exists between two tectonic plates that are moving away from each other.” ...
Bathymetric Map Project
... Begin to find plate boundaries • Ocean ridges, rises, and deep ocean trenches are all geologic features that are formed at plate boundaries • Let’s use these features to draw some of our plate boundaries • Use a Yellow colored pencil to trace over the ridges and rises (white areas). ...
... Begin to find plate boundaries • Ocean ridges, rises, and deep ocean trenches are all geologic features that are formed at plate boundaries • Let’s use these features to draw some of our plate boundaries • Use a Yellow colored pencil to trace over the ridges and rises (white areas). ...
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.