PLATE TECTONICS: Lecture 5
... margin, and also quite major differences as we go back in time. But it is important to understand subduction because this is where the continental crust grew progressively with time. Subduction is where tectonics, structural geology, sedimentation, igneous petrology, metamorphism, geochemistry, geop ...
... margin, and also quite major differences as we go back in time. But it is important to understand subduction because this is where the continental crust grew progressively with time. Subduction is where tectonics, structural geology, sedimentation, igneous petrology, metamorphism, geochemistry, geop ...
Supercycles in subduction zones
... efforts were aimed at improving our understanding relative to each other. of the physical processes at work in an earthquake cycle. In future, this knowledge could be used for These stresses build up most rapidly at the edges generating long-term estimates of the risk of of the seismogenic zone. If ...
... efforts were aimed at improving our understanding relative to each other. of the physical processes at work in an earthquake cycle. In future, this knowledge could be used for These stresses build up most rapidly at the edges generating long-term estimates of the risk of of the seismogenic zone. If ...
Study Guide - Islands Unit Exam
... Describe the main sources of heat of the Earth’s interior. Distinguish between evidence and reasoning statements as they apply to sources of heat of the Earth’s interior. Plate Boundaries Restate the theory of continental drift and plate tectonics. Describe the following types of plate boundar ...
... Describe the main sources of heat of the Earth’s interior. Distinguish between evidence and reasoning statements as they apply to sources of heat of the Earth’s interior. Plate Boundaries Restate the theory of continental drift and plate tectonics. Describe the following types of plate boundar ...
Tectonic erosion along the Japan and Peru convergent margins
... margins of the Atlantic (compare Wernicke and Burchfiel, 1982; Beach and others, 1987; Sibuet and others, 1987). Boillot and others (1987) have advanced a simple shear interpretation of the seismic reflection data and results from deep ocean drilling along the Galicia margin where half-graben blocks ...
... margins of the Atlantic (compare Wernicke and Burchfiel, 1982; Beach and others, 1987; Sibuet and others, 1987). Boillot and others (1987) have advanced a simple shear interpretation of the seismic reflection data and results from deep ocean drilling along the Galicia margin where half-graben blocks ...
Plate tectonics
... Emperor Sea Mount chain islands or sea mountains formed over hotspots (fixed area where magma comes up) ...
... Emperor Sea Mount chain islands or sea mountains formed over hotspots (fixed area where magma comes up) ...
LECTURE W14-15-L29-30
... Geophys. Res., 95, 19583-19599) and Juan de Fuca-North American plate convergence rates (Verplanck and Duncan, 1987 Tectonics, 6, 197-209) for the past 35 Ma. The volcanics are poorly exposed and sampled, so the timing should be considered tentative. Winter (2001) An Introduction to Igneous and Meta ...
... Geophys. Res., 95, 19583-19599) and Juan de Fuca-North American plate convergence rates (Verplanck and Duncan, 1987 Tectonics, 6, 197-209) for the past 35 Ma. The volcanics are poorly exposed and sampled, so the timing should be considered tentative. Winter (2001) An Introduction to Igneous and Meta ...
Continental crust - British Academy Wiki
... • These interactions have resulted in many phenomena (including earthquakes, volcanoes and mountain building) being found along these plate margins or boundaries. • Differences in: – the directions of movement and – because some plates are continental and some are ...
... • These interactions have resulted in many phenomena (including earthquakes, volcanoes and mountain building) being found along these plate margins or boundaries. • Differences in: – the directions of movement and – because some plates are continental and some are ...
CHAPTER 2 Plate Tect..
... progressively older away from a mid-ocean ridge. The lithosphere, the rigid outer layer of Earth, is broken into discrete plates that move relative to each other. Plates consist of the crust and the uppermost (cooler) mantle. Lithosphere plates effectively float on the underlying soft asthenosphere. ...
... progressively older away from a mid-ocean ridge. The lithosphere, the rigid outer layer of Earth, is broken into discrete plates that move relative to each other. Plates consist of the crust and the uppermost (cooler) mantle. Lithosphere plates effectively float on the underlying soft asthenosphere. ...
Plate Tectonics
... Earths crust is not a uniform covering, its made of 8 major and minor plates – North American/Pacific/Juan de Fuca plate As these plates move, the continents are rafted along passively (like a piggyback ride on top of Aesthenosphere, which is on top of the mantle 1960’s the Theory of Continental Dri ...
... Earths crust is not a uniform covering, its made of 8 major and minor plates – North American/Pacific/Juan de Fuca plate As these plates move, the continents are rafted along passively (like a piggyback ride on top of Aesthenosphere, which is on top of the mantle 1960’s the Theory of Continental Dri ...
Plate Tectonics Tutoiral Questions
... 3. a rise in sea level after deposition 4. crustal movement occurring after deposition ...
... 3. a rise in sea level after deposition 4. crustal movement occurring after deposition ...
1 Section 4.4 - Sea- Floor Spreading Directions
... gave rise to today’s continents; means “all lands” 31) How do landforms support the Theory of Continental Drift? mountain ranges in Africa and South America line up; European coal fields match North ...
... gave rise to today’s continents; means “all lands” 31) How do landforms support the Theory of Continental Drift? mountain ranges in Africa and South America line up; European coal fields match North ...
plate boundary
... explored. Pay close attention when your plate boundary is zoomed in on. Take note of the type of plate boundary it is and what you see at the boundary – Lab Questions. 4. After all six boundaries have been looked at on the map, discuss with your group your plate boundary. What type of boundary is it ...
... explored. Pay close attention when your plate boundary is zoomed in on. Take note of the type of plate boundary it is and what you see at the boundary – Lab Questions. 4. After all six boundaries have been looked at on the map, discuss with your group your plate boundary. What type of boundary is it ...
A density model of the Andean subduction zone
... The upper crust is shaped like a lens, thickening up to 20-25 km beneath the Cordillera mountain belt and thinning at the edges near the coast and the Subandean thrust. The marine sediments which have been affected by tectonic deformation are seen in the Eastern Cordillera and Subandean ranges with ...
... The upper crust is shaped like a lens, thickening up to 20-25 km beneath the Cordillera mountain belt and thinning at the edges near the coast and the Subandean thrust. The marine sediments which have been affected by tectonic deformation are seen in the Eastern Cordillera and Subandean ranges with ...
Chapter 9.4 - Planet Earth
... where cool, dense slabs of oceanic lithosphere plunge into the mantle. Shallow-focus earthquakes are produced as the descending plate interacts with the lithosphere above it. As the slab descends farther into the mantle, deeper-focus earthquakes are produced. No earthquakes have been recorded below ...
... where cool, dense slabs of oceanic lithosphere plunge into the mantle. Shallow-focus earthquakes are produced as the descending plate interacts with the lithosphere above it. As the slab descends farther into the mantle, deeper-focus earthquakes are produced. No earthquakes have been recorded below ...
Plate Tectonics: GL209 Prof. John Tarney Lecture 5: Subduction
... differences along the Andean margin, and also quite major differences as we go back in time. But it is important to understand subduction because this is where the continental crust grew progressively with time. Subduction is where tectonics, structural geology, sedimentation, igneous petrology, met ...
... differences along the Andean margin, and also quite major differences as we go back in time. But it is important to understand subduction because this is where the continental crust grew progressively with time. Subduction is where tectonics, structural geology, sedimentation, igneous petrology, met ...
PLATE TECTONICS - UA Geosciences
... stationary plate) is actually moving on the globe. In the case of ridges, we use the half spreading rate for velocity calculations. ...
... stationary plate) is actually moving on the globe. In the case of ridges, we use the half spreading rate for velocity calculations. ...
Plate Tectonics
... and positive gravity anomalies (mantle upwelling). Rift valleys are offset by strike slip faults called Transform faults (differential movement) or Fracture Zones (movement in same direction). Earthquakes occur along these also. ...
... and positive gravity anomalies (mantle upwelling). Rift valleys are offset by strike slip faults called Transform faults (differential movement) or Fracture Zones (movement in same direction). Earthquakes occur along these also. ...
Lecture Outlines PowerPoint Chapter 7 Earth Science, 12e Tarbuck
... Plate boundaries • Types of plate boundaries • Convergent plate boundaries (destructive margins) • Oceanic–oceanic convergence • Two oceanic slabs converge and one descends beneath the other • Often forms volcanoes on the ocean floor • Volcanic island arc forms as volcanoes emerge from the sea • Ex ...
... Plate boundaries • Types of plate boundaries • Convergent plate boundaries (destructive margins) • Oceanic–oceanic convergence • Two oceanic slabs converge and one descends beneath the other • Often forms volcanoes on the ocean floor • Volcanic island arc forms as volcanoes emerge from the sea • Ex ...
10. Continents: structure and history 10.1. Structure of continents
... obvious example of continental growth by accretion is when two continental landmasses merge during continental collision (e.g. collision between India and Eurasia forming the Himalayan mountain chain). Less obvious but nonetheless of fundamental importance is the accretion of blocks moving along a t ...
... obvious example of continental growth by accretion is when two continental landmasses merge during continental collision (e.g. collision between India and Eurasia forming the Himalayan mountain chain). Less obvious but nonetheless of fundamental importance is the accretion of blocks moving along a t ...
The Paleozoic/Mesozoic tectonic evolution of Eastern Australia
... Relationships between metal deposits and both divergent and convergent margin processes have been known for many decades. However, the challenge still remains to understand the way in which "geodynamic niches" such as slab windows, rapid convergence, or phases of flatslab subduction, control the for ...
... Relationships between metal deposits and both divergent and convergent margin processes have been known for many decades. However, the challenge still remains to understand the way in which "geodynamic niches" such as slab windows, rapid convergence, or phases of flatslab subduction, control the for ...
"Inside Earth" Chapter 1 Section 4
... * Evidence from Drilling Samples: rock farther from the ridge is older; rock closer to the ridge is younger. Subduction at Trenches * In a process called subduction, which takes tens of millions of years, part of the ocean floor sinks back into the mantle at deep-ocean trenches. ...
... * Evidence from Drilling Samples: rock farther from the ridge is older; rock closer to the ridge is younger. Subduction at Trenches * In a process called subduction, which takes tens of millions of years, part of the ocean floor sinks back into the mantle at deep-ocean trenches. ...
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.