Plate Tectonic Theory
... These massive slabs seem to float because of their composition. Continental crust is composed of Granitic rocks which are made of lighter minerals and are less dense than the oceanic crust which is composed of denser and heavier basaltic rocks. ...
... These massive slabs seem to float because of their composition. Continental crust is composed of Granitic rocks which are made of lighter minerals and are less dense than the oceanic crust which is composed of denser and heavier basaltic rocks. ...
Topic 11A: Plate Tectonics, Part III Online Lecture: Types of
... Older crust more dense than Convection Younger crust ...
... Older crust more dense than Convection Younger crust ...
plate tectonics
... The longest mountain chain in the world is the Mid-Atlantic Ridge, found in the Atlantic Ocean. The deepest trench is the Marianas Trench, found in the Pacific Ocean . ...
... The longest mountain chain in the world is the Mid-Atlantic Ridge, found in the Atlantic Ocean. The deepest trench is the Marianas Trench, found in the Pacific Ocean . ...
Plate Tectonics - Paul J. Goodenough
... o Combined theory of Continental Drift & Seafloor Spreading. o Earth’s crust & upper mantle (lithosphere) are broken into plates and move around on a plastic-like layer of the mantle (asthenosphere.) o Seven Major Plates: Pacific (largest), Atlantic, African, North American, South American, Eurasian ...
... o Combined theory of Continental Drift & Seafloor Spreading. o Earth’s crust & upper mantle (lithosphere) are broken into plates and move around on a plastic-like layer of the mantle (asthenosphere.) o Seven Major Plates: Pacific (largest), Atlantic, African, North American, South American, Eurasian ...
ES practice quiz tectonics faults folds `12
... II. Folds The type of stress that typically causes folds in rock is _____________________________. III. Faulting vs. folding. For each of the following conditions write the words “fault” or “fold” to indicate which type of deformation would be more likely for the condition. For each pair one conditi ...
... II. Folds The type of stress that typically causes folds in rock is _____________________________. III. Faulting vs. folding. For each of the following conditions write the words “fault” or “fold” to indicate which type of deformation would be more likely for the condition. For each pair one conditi ...
File - Science Source
... 7. Describe what happens when a plate carrying oceanic crust collides with a plate carrying continental crust. ...
... 7. Describe what happens when a plate carrying oceanic crust collides with a plate carrying continental crust. ...
Plate tectonics web quest Alfred Wegner noticed that Greenland had
... continents didn't move but were "carried" by larger pieces of the earth's crust. Harry worked and led to the development of plate tectonics. More information Harry Hess The four types of divergent boundaries are Divergent boundaries, where new crust is generated as the plates pull away from each oth ...
... continents didn't move but were "carried" by larger pieces of the earth's crust. Harry worked and led to the development of plate tectonics. More information Harry Hess The four types of divergent boundaries are Divergent boundaries, where new crust is generated as the plates pull away from each oth ...
Plate Tectonics and the Earth`s Interior
... earth's surface (lithosphere) consists of rigid plates, each moving relative to adjacent plates. Deformation occurs at the edges of the plates by three types of ...
... earth's surface (lithosphere) consists of rigid plates, each moving relative to adjacent plates. Deformation occurs at the edges of the plates by three types of ...
Plate Tectonics
... Continental drift theory is the movement of the continents It states that 250 million years ago the continents were one super continent and have since drifted apart The super continent is called Pangaea ...
... Continental drift theory is the movement of the continents It states that 250 million years ago the continents were one super continent and have since drifted apart The super continent is called Pangaea ...
Plate Boundaries and Earth`s Land Features
... the lava builds up and forms huge underwater mountain ranges along the ocean's floor. The mountain ranges are called mid-ocean ridges. When the mid-ocean ridge actually builds up enough height to extend above the water's surface, it forms an island. Iceland is an example of such an island. Located a ...
... the lava builds up and forms huge underwater mountain ranges along the ocean's floor. The mountain ranges are called mid-ocean ridges. When the mid-ocean ridge actually builds up enough height to extend above the water's surface, it forms an island. Iceland is an example of such an island. Located a ...
Top driven asymmetric mantle convection
... computed the volume of the plates lost along subduction zones, which is about 306 km3/yr (±15). Mass balance predicts that slabs are compensated by broad passive upwellings beneath oceans, mainly at oceanic ridges and backarc basins. These may correspond to the broad low wavespeed regions found in t ...
... computed the volume of the plates lost along subduction zones, which is about 306 km3/yr (±15). Mass balance predicts that slabs are compensated by broad passive upwellings beneath oceans, mainly at oceanic ridges and backarc basins. These may correspond to the broad low wavespeed regions found in t ...
INSIDE EARTH: CHAPTER 3
... The crust melts and forms magma, which then rises back towards the surface. ...
... The crust melts and forms magma, which then rises back towards the surface. ...
Tectonic Plate Boundaries
... oceanic trench, or valley, at the edge of the continent. The crust continues to be forced deeper into the earth, where high heat and pressure the crust to melt & then rise. When this magma finds its way to the surface through a vent in the crust, the volcano erupts. An example of this is the band of ...
... oceanic trench, or valley, at the edge of the continent. The crust continues to be forced deeper into the earth, where high heat and pressure the crust to melt & then rise. When this magma finds its way to the surface through a vent in the crust, the volcano erupts. An example of this is the band of ...
Earth Science Chapter 17: Plate Tectonics Chapter Overview
... Places where two tectonic plates are moving toward each other are convergent boundaries. There are three types of convergent boundaries based on the type of crust involved. The types are: oceanic crust converging with oceanic crust, oceanic crust converging with continental crust, and continental cr ...
... Places where two tectonic plates are moving toward each other are convergent boundaries. There are three types of convergent boundaries based on the type of crust involved. The types are: oceanic crust converging with oceanic crust, oceanic crust converging with continental crust, and continental cr ...
Plate Tectonics
... Mid-ocean ridges are underwater chains that run through Earth’s ocean basin Seafloor Spreading Mid-ocean ridges are places where the _____________sea floor spreads___________________ As tectonic plates__________ rises to fill in the gaps The hot magma contacts ocean water, cools and hardens ...
... Mid-ocean ridges are underwater chains that run through Earth’s ocean basin Seafloor Spreading Mid-ocean ridges are places where the _____________sea floor spreads___________________ As tectonic plates__________ rises to fill in the gaps The hot magma contacts ocean water, cools and hardens ...
Commotion Beneath the Ocean
... where hot molten rock, ash, and gases to escape from deep below the surface • Underwater volcanoes are called Hydrothermal vents ...
... where hot molten rock, ash, and gases to escape from deep below the surface • Underwater volcanoes are called Hydrothermal vents ...
Document
... 2. The hypothesis that continents can drift apart and have done so in the past is known as .______________________ 3. The ______________________ is the soft layer of the mantle on which the tectonic plates move. 4. ______________________ is stress that occurs when forces act to stretch anobject. 5. ...
... 2. The hypothesis that continents can drift apart and have done so in the past is known as .______________________ 3. The ______________________ is the soft layer of the mantle on which the tectonic plates move. 4. ______________________ is stress that occurs when forces act to stretch anobject. 5. ...
Section 17.3 Theory of Plate Tectonics
... Example Rift Valley Locations: ________________________ ...
... Example Rift Valley Locations: ________________________ ...
Unit 7 Plate Tectonics: Key Concept Notes
... 2. Land Features and fossils: if the continents were placed together then land features such as mountains of the same age and composition line up. Fossils of various species of plants and animals also line up when the continents are pieced together 3. Climatic Evidence: Evidence of glacier activity ...
... 2. Land Features and fossils: if the continents were placed together then land features such as mountains of the same age and composition line up. Fossils of various species of plants and animals also line up when the continents are pieced together 3. Climatic Evidence: Evidence of glacier activity ...
ppt file - Angelfire
... ocean called the Tethys Ocean were sat on a tectonic plate. This plate was moving northwards towards Asia at a rate of 10 centimeters per year. The Tethys oceanic crust was being subducted under the Asian Continent. The ocean got progressively smaller until about 55 milion years ago when India 'hit' ...
... ocean called the Tethys Ocean were sat on a tectonic plate. This plate was moving northwards towards Asia at a rate of 10 centimeters per year. The Tethys oceanic crust was being subducted under the Asian Continent. The ocean got progressively smaller until about 55 milion years ago when India 'hit' ...
ch07 - earthjay science
... The ocean’s crust is primarily composed of ______________. a. mafic igneous rocks b. felsic igneous rocks c. metamorphic rocks d. intermediate igneous rocks e. granite ...
... The ocean’s crust is primarily composed of ______________. a. mafic igneous rocks b. felsic igneous rocks c. metamorphic rocks d. intermediate igneous rocks e. granite ...
File
... 18. The Aleutian Islands are an island arc that resulted from the subduction of the Pacific Plate into the Aleutian Trench. Island arcs are made up of basalts, but these basalts are different in composition from the basalts that make up the Hawaiian Islands. Hotspot volcanoes produce basalts with hi ...
... 18. The Aleutian Islands are an island arc that resulted from the subduction of the Pacific Plate into the Aleutian Trench. Island arcs are made up of basalts, but these basalts are different in composition from the basalts that make up the Hawaiian Islands. Hotspot volcanoes produce basalts with hi ...
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.