INTERNAL STRUCTURE OF THE EARTH AND PLATE TECTONICS
... – Made up of the rigid mantle and crust – Cool, strong, outermost layer of Earth; averages about 100 km thick – Thin at mid-oceanic ridges; 120 km under oceans – 40-400 km thick under continents • Asthenosphere – Hot, slowly flowing layer of relatively weak rock – Low seismic velocity zone ...
... – Made up of the rigid mantle and crust – Cool, strong, outermost layer of Earth; averages about 100 km thick – Thin at mid-oceanic ridges; 120 km under oceans – 40-400 km thick under continents • Asthenosphere – Hot, slowly flowing layer of relatively weak rock – Low seismic velocity zone ...
NOTES Plate Tectonics
... 10. If new ocean floor is added all the time at mid-ocean ridges, why is the Earth not getting larger? Old ocean floor is subducted at continental margins. 11. Subduction - the process that occurs when ocean floor sinks beneath a deep ocean trench and returns to the mantle. ...
... 10. If new ocean floor is added all the time at mid-ocean ridges, why is the Earth not getting larger? Old ocean floor is subducted at continental margins. 11. Subduction - the process that occurs when ocean floor sinks beneath a deep ocean trench and returns to the mantle. ...
No Slide Title - Erdkinder.net
... As the seafloor spreads apart, magma moves upward and flows from the cracks. It becomes solid as it cools and forms new seafloor. As new seafloor moves away from the ridge, it cools, contracts, and becomes denser than the material below it. This dense, colder seafloor begins to sink, helping to for ...
... As the seafloor spreads apart, magma moves upward and flows from the cracks. It becomes solid as it cools and forms new seafloor. As new seafloor moves away from the ridge, it cools, contracts, and becomes denser than the material below it. This dense, colder seafloor begins to sink, helping to for ...
Continental Drift Theory and Plate Tectonics
... the Earth's outer shell is not one solid sheet of rock but a series of large and small moving plates. • What did scientists realize when they “connected the dots?” ...
... the Earth's outer shell is not one solid sheet of rock but a series of large and small moving plates. • What did scientists realize when they “connected the dots?” ...
Convection
... Subduction at Trenches • Deep-ocean trench- underwater canyon where ocean crust sinks into the mantle. • Subduction- process by which ocean crust sinks beneath a deep-ocean trench and back into the mantle ...
... Subduction at Trenches • Deep-ocean trench- underwater canyon where ocean crust sinks into the mantle. • Subduction- process by which ocean crust sinks beneath a deep-ocean trench and back into the mantle ...
Cratonic keels and a 2-layer mantle tested:
... traps a sliver of upper plate downbend moves forward ...
... traps a sliver of upper plate downbend moves forward ...
Plate Tectonics Test
... Pangaea is the name of the land mass when the continents were joined together. Describe the theory of plate tectonics? A theory that Earth’s lithosphere is broken into large sections called plates. These plates move causing old crust to change or be destroyed and new crust to form. What scientific e ...
... Pangaea is the name of the land mass when the continents were joined together. Describe the theory of plate tectonics? A theory that Earth’s lithosphere is broken into large sections called plates. These plates move causing old crust to change or be destroyed and new crust to form. What scientific e ...
Plate Tectonics
... Write the letter of the correct answer on the line at the left. (1 point each) _____ 1. Scientists rejected Wegener’s theory because he could not a. explain why continental crust was denser that oceanic crust b. describe the climate of Pangaea c. explain what force pushes or pulls continents d. desc ...
... Write the letter of the correct answer on the line at the left. (1 point each) _____ 1. Scientists rejected Wegener’s theory because he could not a. explain why continental crust was denser that oceanic crust b. describe the climate of Pangaea c. explain what force pushes or pulls continents d. desc ...
Document
... Subduction • _________ ___________ subducts underneath the continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming ___________ • E.g. _____ _________ Source: Your Planet Earth ...
... Subduction • _________ ___________ subducts underneath the continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming ___________ • E.g. _____ _________ Source: Your Planet Earth ...
Plate tectonics
... Here you will see a map of the globe with the tectonic plate boundaries and the earthquakes from the last week. You can plot past earthquakes using the archive. Go back over as many weeks as you wish and create a list noting the magnitude (M) and depth of the earthquake’s source (D). Using the tecto ...
... Here you will see a map of the globe with the tectonic plate boundaries and the earthquakes from the last week. You can plot past earthquakes using the archive. Go back over as many weeks as you wish and create a list noting the magnitude (M) and depth of the earthquake’s source (D). Using the tecto ...
Unit 7 Test Review
... 1. Theory of plate tectonics- Theory that the Earth’s surface is made of large plates that move around, cause changes in position of the continents and oceans, and result in mountains, trenches, and volcanic rings ...
... 1. Theory of plate tectonics- Theory that the Earth’s surface is made of large plates that move around, cause changes in position of the continents and oceans, and result in mountains, trenches, and volcanic rings ...
Plate tectonics - 2 Subduction Zones Transform Faults
... NEIC (yellow dots, with radii proportional to seismic magnitude). Moment-tensor solutions from the Harvard CMT catalog (21) are shown for the 26 December 2004 and 28 March 2005 mainshocks (large solutions at bottom, with associated centroid locations) and aftershocks. Star indicates the epicenter fo ...
... NEIC (yellow dots, with radii proportional to seismic magnitude). Moment-tensor solutions from the Harvard CMT catalog (21) are shown for the 26 December 2004 and 28 March 2005 mainshocks (large solutions at bottom, with associated centroid locations) and aftershocks. Star indicates the epicenter fo ...
Plate Tectonics - NagelBeelmanScience
... The plates that border or contain us are: Juan de Fuca, Caribbean, and Coco's Plate. We in any danger? Mt.Rainier might erupt. Major slippage along the fault is due (earthquakes). Problems in the distant future: The area west of the San ...
... The plates that border or contain us are: Juan de Fuca, Caribbean, and Coco's Plate. We in any danger? Mt.Rainier might erupt. Major slippage along the fault is due (earthquakes). Problems in the distant future: The area west of the San ...
2.13 Divergent Plate Boundaries
... At divergent plate boundaries, plates move away from each other . Many of these boundaries occur along the oceanic ridge system and are referred to as oceanic spreading centers. They are the sites where the seafloor spreads ...
... At divergent plate boundaries, plates move away from each other . Many of these boundaries occur along the oceanic ridge system and are referred to as oceanic spreading centers. They are the sites where the seafloor spreads ...
Document
... the subduction fluids during subduction initiation 4. Biosphere: Circulation of subducted fluids in the mantle and crust and their boundary (Moho) generates an unusual deep biosphere Our objectives differ from those of the M2M projects aimed at mid ocean ridges, which focus on the formation of the o ...
... the subduction fluids during subduction initiation 4. Biosphere: Circulation of subducted fluids in the mantle and crust and their boundary (Moho) generates an unusual deep biosphere Our objectives differ from those of the M2M projects aimed at mid ocean ridges, which focus on the formation of the o ...
Name
... 6. What layer of the Earth consists mainly of iron? 7. List some evidence that proved continental drift did occur? 8. Earthquakes mainly are associated with what one boundary? 9. Draw and label all the layers and sub layers of the Earth. 10. What do the tectonic plates “float” on? 11. What produces ...
... 6. What layer of the Earth consists mainly of iron? 7. List some evidence that proved continental drift did occur? 8. Earthquakes mainly are associated with what one boundary? 9. Draw and label all the layers and sub layers of the Earth. 10. What do the tectonic plates “float” on? 11. What produces ...
Plate Tectonic Quiz Name: Label the four layers of the Earth Use the
... Min-Ocean Ridge Ocean Trench ...
... Min-Ocean Ridge Ocean Trench ...
Study Guide Questions – Earth Structure and Plate Tectonics What
... Could you locate all the major plate boundaries on a map that shows only earthquake epicenters? What is the geometry and depth of earthquakes at a mid-ocean ridge? At a submarine trench? Sketch a single plate on the surface of a sphere. Move the plate in one direction. What are the three fundamental ...
... Could you locate all the major plate boundaries on a map that shows only earthquake epicenters? What is the geometry and depth of earthquakes at a mid-ocean ridge? At a submarine trench? Sketch a single plate on the surface of a sphere. Move the plate in one direction. What are the three fundamental ...
Plate Tectonics PP Ch 3
... will thin in the middle until it is stressed so much that it breaks. ...
... will thin in the middle until it is stressed so much that it breaks. ...
Lecture 2: Dynamic Earth: Plate Tectonics
... • The theory was put together in late 1960s and early 1970s.The lithosphere is broken into a dozen of rigid blocks "plates", which are moving continuously. • Seven major plates: North American, South American, Pacific, African, Eurasian, Australian-Indian, and Antarctic. ...
... • The theory was put together in late 1960s and early 1970s.The lithosphere is broken into a dozen of rigid blocks "plates", which are moving continuously. • Seven major plates: North American, South American, Pacific, African, Eurasian, Australian-Indian, and Antarctic. ...
QUIZ
... a. Briefly explain using specific detail or examples how the following observations were used to support Wegener’s hypothesis of continental drift. (choose 3) fit of the continents paleoclimate fossil record glacial evidence mountain ranges and rock types b. What important explanation was missing fr ...
... a. Briefly explain using specific detail or examples how the following observations were used to support Wegener’s hypothesis of continental drift. (choose 3) fit of the continents paleoclimate fossil record glacial evidence mountain ranges and rock types b. What important explanation was missing fr ...
INSIDE THE EARTH
... EQ6: What happens at deep-ocean trenches? Subduction occurs at deep-ocean trenches. This is where the sea floor goes back into the mantle. ...
... EQ6: What happens at deep-ocean trenches? Subduction occurs at deep-ocean trenches. This is where the sea floor goes back into the mantle. ...
Ocean Topography
... there & a resident population of approximately 280 Northern Bottlenose Whales. The natural gas pipeline goes right by it…problems? ...
... there & a resident population of approximately 280 Northern Bottlenose Whales. The natural gas pipeline goes right by it…problems? ...
Where does subduction initiate and die? Insights from global
... Our calculations indicate that the presence of the continents alterns stress distribution within a certain distance from the margins. Intra-oceanic subudction initiation is favorable during super-continent cycles while the initiation at passive continental margin prevails when continents are dispers ...
... Our calculations indicate that the presence of the continents alterns stress distribution within a certain distance from the margins. Intra-oceanic subudction initiation is favorable during super-continent cycles while the initiation at passive continental margin prevails when continents are dispers ...
SGES 1302 Lecture6 - Department Of Geology
... snakes around the world. This band is particularly evident around the edge of the Pacific Ocean where it is known as the Ring of Fire. Within the ocean basins near these bands are some of the deepest oceanic waters on Earth. These linear areas of anomalously deep water are called trenches. In the la ...
... snakes around the world. This band is particularly evident around the edge of the Pacific Ocean where it is known as the Ring of Fire. Within the ocean basins near these bands are some of the deepest oceanic waters on Earth. These linear areas of anomalously deep water are called trenches. In the la ...
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.