Xtra_credit_MC_chapt_5_2014.txt Xtra_credit_MC_chapt_5_2014.txt
... 1. Where is the most likely place to find mountains or volcanoes a) At convergent plate boundaries b) When one plate is being subducted beneath another c) At divergent plate boundaries d) both a and b ...
... 1. Where is the most likely place to find mountains or volcanoes a) At convergent plate boundaries b) When one plate is being subducted beneath another c) At divergent plate boundaries d) both a and b ...
1 Island Arc Magmatism
... bypasses the arc and descends into the deeper mantle. Perhaps in cases like the Farallon plate crust travels all the way to the core-mantle boundary ...
... bypasses the arc and descends into the deeper mantle. Perhaps in cases like the Farallon plate crust travels all the way to the core-mantle boundary ...
Chapter 19 - Heritage Collegiate
... sediment becomes a convergent plate boundary, the oceanic crust moves downward and the pressure and heat may transform the sedimentary rock into metamorphic rock. Some of the oceanic crust may go deep enough and begin to melt. When this occurs, the magma will move upward and some will cool below the ...
... sediment becomes a convergent plate boundary, the oceanic crust moves downward and the pressure and heat may transform the sedimentary rock into metamorphic rock. Some of the oceanic crust may go deep enough and begin to melt. When this occurs, the magma will move upward and some will cool below the ...
Quantifying the net slab pull force as a driving mechanism for plate
... 1. Introduction [2] Plate tectonic theory provides explanations for numerous large-scale features on Earth, such as mid-oceanic ridges, trenches and mountain chains. The theory is well established and its kinematic framework is generally accepted. However, considerable debate remains about the drivi ...
... 1. Introduction [2] Plate tectonic theory provides explanations for numerous large-scale features on Earth, such as mid-oceanic ridges, trenches and mountain chains. The theory is well established and its kinematic framework is generally accepted. However, considerable debate remains about the drivi ...
topic_4_5 - Earth and Environmental Sciences
... is being rapidly transported into the Earth’s interior, with little time to be conductively heated by the surrounding, hotter mantle. We’ve shown several figures – of thermal models for subduction zones, and seismic data – illustrating that this is true. As noted in the previous lecture, there is am ...
... is being rapidly transported into the Earth’s interior, with little time to be conductively heated by the surrounding, hotter mantle. We’ve shown several figures – of thermal models for subduction zones, and seismic data – illustrating that this is true. As noted in the previous lecture, there is am ...
Lecture #10 -- Magma types and types of eruptions (text pages 151
... high iron content. They have low viscosity because they are hot (>1000°C) and have low silica content and have low volatile (H2O) contents. Therefore they erupt passively as lava flows, forming spatter cones and flows, shield volcanoes (like in Hawaii -- see figure below) and large lava plateaus (li ...
... high iron content. They have low viscosity because they are hot (>1000°C) and have low silica content and have low volatile (H2O) contents. Therefore they erupt passively as lava flows, forming spatter cones and flows, shield volcanoes (like in Hawaii -- see figure below) and large lava plateaus (li ...
loeclosednotes
... - ______, rigid, brittle, broken into _______ that move slowly and independently of one another. - This plate movement causes _________, volcanic eruptions, mountain shaping and _________ spreading. - This section floats on top of the ________________ ...
... - ______, rigid, brittle, broken into _______ that move slowly and independently of one another. - This plate movement causes _________, volcanic eruptions, mountain shaping and _________ spreading. - This section floats on top of the ________________ ...
Platemovementrecapquiz 5.08MB 2017-03-29 12
... Deep ocean trenches are found along the seaward edge of destructive margins. They mark where one plate begins to descend beneath another and can reach great depths. E.g. Peru-Chile trench, 8km deep As it is less dense than the surrounding asthenosphere, the molten material begins to rise up through ...
... Deep ocean trenches are found along the seaward edge of destructive margins. They mark where one plate begins to descend beneath another and can reach great depths. E.g. Peru-Chile trench, 8km deep As it is less dense than the surrounding asthenosphere, the molten material begins to rise up through ...
Document
... • Subduction zones (Wadati-Benioff zones) were discovered where the crust plunges into the mantle • crust is destroyed here • explains why the ocean floor is so ...
... • Subduction zones (Wadati-Benioff zones) were discovered where the crust plunges into the mantle • crust is destroyed here • explains why the ocean floor is so ...
Mantle Plumes and Intraplate Volcanism Volcanism on the Earth
... Chemical Histories of Mantle Plumes • Apparently, the material in mantle plumes has evolved through just a few pathways. What are these? No one is certain. Some ideas: – 1. Mixing between primitive and depleted mantle – 2. Recycling of oceanic crust and sediment – 3. “Delamination” of the mantle lit ...
... Chemical Histories of Mantle Plumes • Apparently, the material in mantle plumes has evolved through just a few pathways. What are these? No one is certain. Some ideas: – 1. Mixing between primitive and depleted mantle – 2. Recycling of oceanic crust and sediment – 3. “Delamination” of the mantle lit ...
Trace element patterns show that Guatemala rocks
... subduction. Several lines of evidence suggest that the rocks were metasomatized in the subduction zone environment. Although the eclogites have MORB affinities (εNd, bulk chemistry, REE), their trace element patterns are similar to arc lavas with large enrichments in LILE and Pb as well as depletion ...
... subduction. Several lines of evidence suggest that the rocks were metasomatized in the subduction zone environment. Although the eclogites have MORB affinities (εNd, bulk chemistry, REE), their trace element patterns are similar to arc lavas with large enrichments in LILE and Pb as well as depletion ...
Sept 9 - Assignment Answers: Plate Tectonics
... 2. Using the terms: Subduction, Divergence and Transform Boundary, name the type of plate motion that is occurring at the following plate boundaries: 2a. the Nazca and South American Plates ___convergent____________________________ 2b. the Antarctic and Indian-Australian Plates __Divergent__________ ...
... 2. Using the terms: Subduction, Divergence and Transform Boundary, name the type of plate motion that is occurring at the following plate boundaries: 2a. the Nazca and South American Plates ___convergent____________________________ 2b. the Antarctic and Indian-Australian Plates __Divergent__________ ...
Magnitude 7.7 SOLOMON ISLANDS
... trenches. Along with its location and depth, the thrust faulting mechanism of the M7.8 December 8, 2016 earthquake indicates that it occurred on the Solomon Trench subduction zone boundary. Two major earthquakes occurred in April 2014 on or near the left-lateral transform fault that connects converg ...
... trenches. Along with its location and depth, the thrust faulting mechanism of the M7.8 December 8, 2016 earthquake indicates that it occurred on the Solomon Trench subduction zone boundary. Two major earthquakes occurred in April 2014 on or near the left-lateral transform fault that connects converg ...
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Plate Tectonics [ TCD IE ]
... between continents and oceans in terms of mainly vertical motions as the young hot Earth cooled and contracted, but these theories became untenable following discovery of radiogenic heating of Earth’s interior. Ideas arising from detailed surveying of India by Sir George Everest and others, together ...
... between continents and oceans in terms of mainly vertical motions as the young hot Earth cooled and contracted, but these theories became untenable following discovery of radiogenic heating of Earth’s interior. Ideas arising from detailed surveying of India by Sir George Everest and others, together ...
Oceanic Lithosphere: How do we determine the thickness? What is
... the x,y,z of the seafloor along your transect. Answer the following questions: 1. Assuming a purely conductive thermal regime, determine the spreading rate at this location? Now load Basemaps>Global Grids>Seafloor bedrock age. Now when you mouseover it will display lat, long and age. 2. Find the age ...
... the x,y,z of the seafloor along your transect. Answer the following questions: 1. Assuming a purely conductive thermal regime, determine the spreading rate at this location? Now load Basemaps>Global Grids>Seafloor bedrock age. Now when you mouseover it will display lat, long and age. 2. Find the age ...
3. Anatomy of recently active convergent plate - diss.fu
... from smectite to illite should play an important role in controlling the interface properties, but also the deformational behavior of sandstone blocks or layers should be taken into account. Downward transported sediments strongly influence the physical properties of the plate interface, because the ...
... from smectite to illite should play an important role in controlling the interface properties, but also the deformational behavior of sandstone blocks or layers should be taken into account. Downward transported sediments strongly influence the physical properties of the plate interface, because the ...
Exam Block #5
... the coastal areas that surround the Atlantic Ocean. They are NOT associated with plate boundaries; therefore, little volcanism and few earthquakes. Features of passive continental margins include: Continental Shelf – submerged part of the continent; however, it was above sea level during the last ...
... the coastal areas that surround the Atlantic Ocean. They are NOT associated with plate boundaries; therefore, little volcanism and few earthquakes. Features of passive continental margins include: Continental Shelf – submerged part of the continent; however, it was above sea level during the last ...
Plate Tectonics Vocabulary Terms
... plates push together In plate tectonics, a convergent boundary, also known as a destructive plate boundary (because of subduction), is an actively deforming region where two (or more) tectonic plates or fragments of lithosphere move toward one another and collide. As a result of pressure, friction, ...
... plates push together In plate tectonics, a convergent boundary, also known as a destructive plate boundary (because of subduction), is an actively deforming region where two (or more) tectonic plates or fragments of lithosphere move toward one another and collide. As a result of pressure, friction, ...
Lecture_Ch03 - earthjay science
... and form a suture zone. • When two continental plates (in this case the Indian and Eurasian plates) come together in great collisions they form the world’s highest mountains. • Thrust faults are common in crustal shortening areas like at convergent plate margins or boundaries. Figure 3-20 The Making ...
... and form a suture zone. • When two continental plates (in this case the Indian and Eurasian plates) come together in great collisions they form the world’s highest mountains. • Thrust faults are common in crustal shortening areas like at convergent plate margins or boundaries. Figure 3-20 The Making ...
Plate tectonics chapter 4 test bank
... 115. List and describe three possible driving forces of tectonic plate motion. 116. How do the three types of convergent boundaries differ from one another? 117. Explain how scientists measure the rate at which tectonic plates move. 118. When convection takes place in the mantle, why does cooler mat ...
... 115. List and describe three possible driving forces of tectonic plate motion. 116. How do the three types of convergent boundaries differ from one another? 117. Explain how scientists measure the rate at which tectonic plates move. 118. When convection takes place in the mantle, why does cooler mat ...
Sea Floor Evidence The technologies developed in the 1940s and
... As the hot mantle rock ascends toward a mid-oceanic ridge, it cools and starts to move laterally away from the ridge. This mantle movement drags the overlying oceanic crust along with it. The mantle material continues to cool, and eventually begins to sink. At this point, the oceanic crust begins to ...
... As the hot mantle rock ascends toward a mid-oceanic ridge, it cools and starts to move laterally away from the ridge. This mantle movement drags the overlying oceanic crust along with it. The mantle material continues to cool, and eventually begins to sink. At this point, the oceanic crust begins to ...
Background Information
... Convergent – Convergent plate boundaries form when two tectonic plates come together and collide with each other. These boundaries can have different results depending on whether they form in continental crust or oceanic crust. ...
... Convergent – Convergent plate boundaries form when two tectonic plates come together and collide with each other. These boundaries can have different results depending on whether they form in continental crust or oceanic crust. ...
Unit 7 Lesson 1 Forces that Change the Earth
... subduction: the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary plate: a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust divergent boundary: a plate boundary ...
... subduction: the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary plate: a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust divergent boundary: a plate boundary ...
lecture7_tomo
... 2. Other arcs show the effect of addition of different continental components to source, most likely Atlantic sediment (Antilles) or Pacific sediment (Banda, New Zealand). The basaltic lavas are more enriched in radioactive elements (more “original” or “primordial”) and more gassed. These are often ...
... 2. Other arcs show the effect of addition of different continental components to source, most likely Atlantic sediment (Antilles) or Pacific sediment (Banda, New Zealand). The basaltic lavas are more enriched in radioactive elements (more “original” or “primordial”) and more gassed. These are often ...
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.