Asthenosphere, Lithosphere, Convection
... Guided Notes: 6/11 Tectonic Plates A tectonic plate is made of the lithosphere. The lithosphere is crust (oceanic or continental) connected to a hard rock layer below Tectonic plates are moved by the asthenosphere The asthenosphere is a slushy part of the Upper Mantle ...
... Guided Notes: 6/11 Tectonic Plates A tectonic plate is made of the lithosphere. The lithosphere is crust (oceanic or continental) connected to a hard rock layer below Tectonic plates are moved by the asthenosphere The asthenosphere is a slushy part of the Upper Mantle ...
ON THE WESTWARD DRIFT OF THE LITHOSPHERE
... We question the hotspot reference frame because it includes volcanic tracks permanently located on ridge zones that are detached from the underlying mantle by kinematic constraints. It is evident that oceanic ridges surrounding Africa moved away from the craton during the opening of the Atlantic and ...
... We question the hotspot reference frame because it includes volcanic tracks permanently located on ridge zones that are detached from the underlying mantle by kinematic constraints. It is evident that oceanic ridges surrounding Africa moved away from the craton during the opening of the Atlantic and ...
Plates converge or scrape past each other.
... The older plate sinks because it is colder and denser than the younger plate. When the older crust reaches the asthenosphere, it melts in the intense heat. Two main features form at oceanic-oceanic subductions: deep-ocean trenches and island arcs. These trenches are like deep canyons that form in th ...
... The older plate sinks because it is colder and denser than the younger plate. When the older crust reaches the asthenosphere, it melts in the intense heat. Two main features form at oceanic-oceanic subductions: deep-ocean trenches and island arcs. These trenches are like deep canyons that form in th ...
Fluid Processes in Subduction Zones Hydrous Minerals and
... • Buoyancy will tend to isolate forearc wedge from corner flow • Heating of hydrated forearc mantle (e.g., ridge subduction, post-subduction) will release significant amounts of H2O ...
... • Buoyancy will tend to isolate forearc wedge from corner flow • Heating of hydrated forearc mantle (e.g., ridge subduction, post-subduction) will release significant amounts of H2O ...
Plates converge or scrape past each other.
... The older plate sinks because it is colder and denser than the younger plate. When the older crust reaches the asthenosphere, it melts in the intense heat. Two main features form at oceanic-oceanic subductions: deep-ocean trenches and island arcs. These trenches are like deep canyons that form in th ...
... The older plate sinks because it is colder and denser than the younger plate. When the older crust reaches the asthenosphere, it melts in the intense heat. Two main features form at oceanic-oceanic subductions: deep-ocean trenches and island arcs. These trenches are like deep canyons that form in th ...
Sea Floor Spreading and Plate Tectonics
... 1. The ages of the rocks that make up the seafloor vary in different places, and that the age of oceanic crust consistently increases with distance from a ridge. – The oldest part of the seafloor is geologically young at about 180 million years old. 2. The thickness of ocean-floor sediment was, in g ...
... 1. The ages of the rocks that make up the seafloor vary in different places, and that the age of oceanic crust consistently increases with distance from a ridge. – The oldest part of the seafloor is geologically young at about 180 million years old. 2. The thickness of ocean-floor sediment was, in g ...
Resource 3 - Relief Patterns
... earth’s crust. They involve convection currents, continental drift, earthquakes, volcanic eruption. Tectonic processes is a theory that suggests that the earth’s crust is divided up into sections and the convections currents cause the tectonic plates to move in different directions, creating differe ...
... earth’s crust. They involve convection currents, continental drift, earthquakes, volcanic eruption. Tectonic processes is a theory that suggests that the earth’s crust is divided up into sections and the convections currents cause the tectonic plates to move in different directions, creating differe ...
Earth Revealed - Metamorphic Rocks
... 1. What is not associated with the metamorphism of igneous and sedimentary rocks? (a) change in appearance (b) recrystallization of minerals (c) new mineral composition (d) melting under high temperature and pressure 2. Which rock would not be considered a protolith of slate, gneiss, marble, or amph ...
... 1. What is not associated with the metamorphism of igneous and sedimentary rocks? (a) change in appearance (b) recrystallization of minerals (c) new mineral composition (d) melting under high temperature and pressure 2. Which rock would not be considered a protolith of slate, gneiss, marble, or amph ...
WS7: Theory of Plate Tectonics
... The lithosphere is divided into a dozen major and several minor plates. The edges of the plates can be identified from the distribution of earthquake epicenters. That’s because most earthquakes occur at plate boundaries. A single plate may consist only of oceanic lithosphere or only of continental l ...
... The lithosphere is divided into a dozen major and several minor plates. The edges of the plates can be identified from the distribution of earthquake epicenters. That’s because most earthquakes occur at plate boundaries. A single plate may consist only of oceanic lithosphere or only of continental l ...
click here for PDF version
... The last subduction zone or megathrust earthquake that occurred in the Cascadia subduction zone was on January 26, 1700. This is known from geological data, historical accounts from Japan, and oral accounts preserved by local First Nations people and families. Science has only recently begun to reco ...
... The last subduction zone or megathrust earthquake that occurred in the Cascadia subduction zone was on January 26, 1700. This is known from geological data, historical accounts from Japan, and oral accounts preserved by local First Nations people and families. Science has only recently begun to reco ...
Class notes (*) - LSU Geology & Geophysics
... Continental Drift The concept that large-scale horizontal movements of the outer portions of the Earth are responsible for the major topographical features such as mountains and ocean basins. Proposed by Alfred Wegner in 1912 based on his observation of drifting sheets of ice. ...
... Continental Drift The concept that large-scale horizontal movements of the outer portions of the Earth are responsible for the major topographical features such as mountains and ocean basins. Proposed by Alfred Wegner in 1912 based on his observation of drifting sheets of ice. ...
Plate Tectonics
... Nearly a century ago, in 1912, the German geologist Alfred Wegener first proposed his theory of Continental Drift, which states that parts of the Earth’s crust slowly drift atop a liquid core. He noticed that all of the continents seemed to fit together like the pieces of a giant puzzle: North Afric ...
... Nearly a century ago, in 1912, the German geologist Alfred Wegener first proposed his theory of Continental Drift, which states that parts of the Earth’s crust slowly drift atop a liquid core. He noticed that all of the continents seemed to fit together like the pieces of a giant puzzle: North Afric ...
key1 - Scioly.org
... e. basalt is pushing up through the trench that parallels the west coast of South America. 5. Pick out the FALSE statement. According to present plate tectonics theory, a. plates move on the asthenosphere. b. plates move at speeds of a few centimeters per year. c. a continental plate will subduct un ...
... e. basalt is pushing up through the trench that parallels the west coast of South America. 5. Pick out the FALSE statement. According to present plate tectonics theory, a. plates move on the asthenosphere. b. plates move at speeds of a few centimeters per year. c. a continental plate will subduct un ...
test - Scioly.org
... e. basalt is pushing up through the trench that parallels the west coast of South America. 5. Pick out the FALSE statement. According to present plate tectonics theory, a. plates move on the asthenosphere. b. plates move at speeds of a few centimeters per year. c. a continental plate will subduct un ...
... e. basalt is pushing up through the trench that parallels the west coast of South America. 5. Pick out the FALSE statement. According to present plate tectonics theory, a. plates move on the asthenosphere. b. plates move at speeds of a few centimeters per year. c. a continental plate will subduct un ...
File
... Roll your mouse over the image to find the definitions of the words below: Continental Crust - ______the earths crust that makes up the continents___ Mountain - __________a high large mass of earth and rock that rises above earths surface with steep or sloping sides._______ 2. At divergent boundarie ...
... Roll your mouse over the image to find the definitions of the words below: Continental Crust - ______the earths crust that makes up the continents___ Mountain - __________a high large mass of earth and rock that rises above earths surface with steep or sloping sides._______ 2. At divergent boundarie ...
plate tectonics - the wavcott.org.uk websites
... Two continental plates are pushing against each other, forcing the plate up into folds and building huge mountain ranges such as the ...
... Two continental plates are pushing against each other, forcing the plate up into folds and building huge mountain ranges such as the ...
chapter 2 - Geophile.net
... 2. Before people understood plate tectonics, what evidence led some scientists to believe in continental drift? * match of coastlines across the Atlantic Ocean * match of rock formations across the Atlantic Ocean * match of ages of continental rocks across the Atlantic Ocean 3. If the coastlines ac ...
... 2. Before people understood plate tectonics, what evidence led some scientists to believe in continental drift? * match of coastlines across the Atlantic Ocean * match of rock formations across the Atlantic Ocean * match of ages of continental rocks across the Atlantic Ocean 3. If the coastlines ac ...
chapter 2 - Geophile.net
... 2. Before people understood plate tectonics, what evidence led some scientists to believe in continental drift? * match of coastlines across the Atlantic Ocean * match of rock formations across the Atlantic Ocean * match of ages of continental rocks across the Atlantic Ocean 3. If the coastlines ac ...
... 2. Before people understood plate tectonics, what evidence led some scientists to believe in continental drift? * match of coastlines across the Atlantic Ocean * match of rock formations across the Atlantic Ocean * match of ages of continental rocks across the Atlantic Ocean 3. If the coastlines ac ...
Magmatic and non-magmatic history of the Tyrrhenain backarc
... data. Here we present two analyses; the first one is focused on the spatial variability of magmatism along the Cornaglia Terrace axis, where magmatic-type crust has been previously interpreted. The comparison of three different seismic refraction transects, acquired across the basin axis from North ...
... data. Here we present two analyses; the first one is focused on the spatial variability of magmatism along the Cornaglia Terrace axis, where magmatic-type crust has been previously interpreted. The comparison of three different seismic refraction transects, acquired across the basin axis from North ...
Chapter 11 Notes: Plate Tectonics
... o Can be associated with volcanic activity as magma/lava erupt to form new crust Convergent boundary – plates converge, or come together o Oceanic crust collides with oceanic crust – the denser oceanic crust is subducted, or sinks, under the less dense oceanic crust o Continental crust collides wi ...
... o Can be associated with volcanic activity as magma/lava erupt to form new crust Convergent boundary – plates converge, or come together o Oceanic crust collides with oceanic crust – the denser oceanic crust is subducted, or sinks, under the less dense oceanic crust o Continental crust collides wi ...
6.2 Plate Tectonics
... tectonic plates, move and change shape. Tectonic Plates – (pg. 199) a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle I. Tectonic Plates (pg. ...
... tectonic plates, move and change shape. Tectonic Plates – (pg. 199) a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle I. Tectonic Plates (pg. ...
No Slide Title
... • Harry Hess, in 1962, proposed the theory of seafloor spreading: – Continents and oceanic crust move together – Seafloor separates at oceanic ridges • where new crust forms from upwelling and cooling magma, and • the new crust moves laterally away from the ridge ...
... • Harry Hess, in 1962, proposed the theory of seafloor spreading: – Continents and oceanic crust move together – Seafloor separates at oceanic ridges • where new crust forms from upwelling and cooling magma, and • the new crust moves laterally away from the ridge ...
EIPG_11e_Lecture_Ch13
... A continental slope is a steep structure that marks the boundary between the continental and oceanic crust ...
... A continental slope is a steep structure that marks the boundary between the continental and oceanic crust ...
Plate Boundaries Activity Worksheet
... boundary. Effects that are found at this type of plate boundary include: a zone of progressively Oceanic - Oceanic deeper earthquakes, an oceanic trench, a chain of volcanic islands, and the destruction of oceanic lithosphere. Convergent Plate Boundary – Continental-Continental: This is a difficult ...
... boundary. Effects that are found at this type of plate boundary include: a zone of progressively Oceanic - Oceanic deeper earthquakes, an oceanic trench, a chain of volcanic islands, and the destruction of oceanic lithosphere. Convergent Plate Boundary – Continental-Continental: This is a difficult ...
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.