Plate Tectonics and the Distribution of Major Landform Features
... The upper mantle consists mainly of liquid magma which may intrude into the crust. It is the source region of most of the earth’s internal energy and of the forces responsible for ocean floor spreading, continental drift and major earthquakes. A part of the upper mantle is now in fact believed to be ...
... The upper mantle consists mainly of liquid magma which may intrude into the crust. It is the source region of most of the earth’s internal energy and of the forces responsible for ocean floor spreading, continental drift and major earthquakes. A part of the upper mantle is now in fact believed to be ...
Structure of the Earth
... – Includes crust and rigid upper mantle – This is the rigid plate of plate tectonics – Base is defined by 1280ºC boundary ...
... – Includes crust and rigid upper mantle – This is the rigid plate of plate tectonics – Base is defined by 1280ºC boundary ...
geol_15_activity_2
... We will use the NASA map, Digital Tectonic Activity of the Earth (2002). You will also benefit with a calculator and color pencils. Part 1: Digital Tectonic Activity of the Earth, Robinson Projection. 1. Identify the major plate boundaries on the chart using the following colors and symbols: a. Dive ...
... We will use the NASA map, Digital Tectonic Activity of the Earth (2002). You will also benefit with a calculator and color pencils. Part 1: Digital Tectonic Activity of the Earth, Robinson Projection. 1. Identify the major plate boundaries on the chart using the following colors and symbols: a. Dive ...
activity 1
... in the mantle there are very slow convection currents (only few cm per year): the deepest material, that is very hot, rises, becomes cool, flows laterally and then falls. (see Activity 6). The rigid lithosphere seems to float over these convection currents. Geologists have known for over a century t ...
... in the mantle there are very slow convection currents (only few cm per year): the deepest material, that is very hot, rises, becomes cool, flows laterally and then falls. (see Activity 6). The rigid lithosphere seems to float over these convection currents. Geologists have known for over a century t ...
Mauna Kea - National Geographic
... Hawaii is the youngest and largest of a chain of islands making up the Hawaiian archipelago. The archipelago is composed of eight main islands and several smaller islands and atolls, which were once active volcanoes that have since sunk and eroded over millions of years. The Hawaiian archipelago for ...
... Hawaii is the youngest and largest of a chain of islands making up the Hawaiian archipelago. The archipelago is composed of eight main islands and several smaller islands and atolls, which were once active volcanoes that have since sunk and eroded over millions of years. The Hawaiian archipelago for ...
The Structure of the Earth and Plate Tectonics
... continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming volcanism • E.g. The Andes Mountains, Mt. Saint Helens ...
... continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming volcanism • E.g. The Andes Mountains, Mt. Saint Helens ...
Crust - Cobb Learning
... The next time you heat anything like soup or water in a pan you can watch the convection currents move in the liquid. When the convection currents flow in the asthenosphere they also move the crust. The crust gets a free ride with these currents, like the cork in this illustration. ...
... The next time you heat anything like soup or water in a pan you can watch the convection currents move in the liquid. When the convection currents flow in the asthenosphere they also move the crust. The crust gets a free ride with these currents, like the cork in this illustration. ...
The Ocean Basin
... No active tectonic process. Typically broad continental shelf. Continental slope terminates at the continental rise. No trench. ...
... No active tectonic process. Typically broad continental shelf. Continental slope terminates at the continental rise. No trench. ...
U4-T2.6-Plate Boundaries
... continental plate (Australian). This collision causes the oceanic plate to subduct beneath the continental plate. These compressional forces generally deform the tectonic plates which result in the continental plate uplifting to form a mountain chain along the length of the convergent boundary. Copy ...
... continental plate (Australian). This collision causes the oceanic plate to subduct beneath the continental plate. These compressional forces generally deform the tectonic plates which result in the continental plate uplifting to form a mountain chain along the length of the convergent boundary. Copy ...
Powerpoint
... What happens when water at different depths has different densities? Layers of water will form Formation of layers is part of the reason we have ocean currents ...
... What happens when water at different depths has different densities? Layers of water will form Formation of layers is part of the reason we have ocean currents ...
Plate Tectonics
... These are also known as transform boundaries or more commonly as faults. Most transform faults are found on the ocean floor. They commonly offset active spreading ridges, producing zig-zag plate margins, and are generally defined by shallow earthquakes. A few, however, occur on land. The San Andreas ...
... These are also known as transform boundaries or more commonly as faults. Most transform faults are found on the ocean floor. They commonly offset active spreading ridges, producing zig-zag plate margins, and are generally defined by shallow earthquakes. A few, however, occur on land. The San Andreas ...
Key elements of Plate Tectonics
... Growth of ocean basin – contd. Nature and Origin of the Ocean floor – contd. ...
... Growth of ocean basin – contd. Nature and Origin of the Ocean floor – contd. ...
Overview Plate Tectonics
... bottom. Only seven megaplumes in the world had been observed previously. ...
... bottom. Only seven megaplumes in the world had been observed previously. ...
10A_InternalEarrthStructTectonics
... • Transform plate boundary – Locations where the edges of two plates slide past one another – Spreading zone is not a single, continuous rift; offset by transform faults – Most transform plate boundaries are within oceanic crust, some occur within continents – Famous transform plate boundary on land ...
... • Transform plate boundary – Locations where the edges of two plates slide past one another – Spreading zone is not a single, continuous rift; offset by transform faults – Most transform plate boundaries are within oceanic crust, some occur within continents – Famous transform plate boundary on land ...
Richard Bailey “How Did Continents Begin?” COLLOQUIUM
... make Tibet so high? Why is their such massive lateral extension visible in the Basin and Range province of the US? How can plate subduction start, given the strength of cold rocks? These are present day problems, but there are also problems associated with the origin of modern tectonics. Arguments o ...
... make Tibet so high? Why is their such massive lateral extension visible in the Basin and Range province of the US? How can plate subduction start, given the strength of cold rocks? These are present day problems, but there are also problems associated with the origin of modern tectonics. Arguments o ...
Oceans - SolPass
... is likely to be (less / *more) dense than warmer water. Water with (*higher/lower) salinity is likely to be denser. 18. The Gulf Stream is one of the Earth's strongest currents. It moves north from the tropics through the Gulf of Mexico, past the east coast of the United States and up to northern Eu ...
... is likely to be (less / *more) dense than warmer water. Water with (*higher/lower) salinity is likely to be denser. 18. The Gulf Stream is one of the Earth's strongest currents. It moves north from the tropics through the Gulf of Mexico, past the east coast of the United States and up to northern Eu ...
Word - SolPass
... is likely to be (less / *more) dense than warmer water. Water with (*higher/lower) salinity is likely to be denser. 18. The Gulf Stream is one of the Earth's strongest currents. It moves north from the tropics through the Gulf of Mexico, past the east coast of the United States and up to northern Eu ...
... is likely to be (less / *more) dense than warmer water. Water with (*higher/lower) salinity is likely to be denser. 18. The Gulf Stream is one of the Earth's strongest currents. It moves north from the tropics through the Gulf of Mexico, past the east coast of the United States and up to northern Eu ...
Oceans - SolPass
... 17. The variation in water density and wind patterns cause ocean currents. Colder water is likely to be (less / more) dense than warmer water. Water with (higher/lower) salinity is likely to be denser. 18. The Gulf Stream is one of the Earth's strongest currents. It moves north from the tropics thro ...
... 17. The variation in water density and wind patterns cause ocean currents. Colder water is likely to be (less / more) dense than warmer water. Water with (higher/lower) salinity is likely to be denser. 18. The Gulf Stream is one of the Earth's strongest currents. It moves north from the tropics thro ...
Word - SolPass
... ocean, is part of the: a. continental slope b. continental shelf c. abyssal plain 3. The continental shelf is: a. the deepest part of the ocean b. fairly deep c. relatively shallow 4. True or False: The shallow water of the continental shelf is teeming with life. 5. The steep slope at the edge of th ...
... ocean, is part of the: a. continental slope b. continental shelf c. abyssal plain 3. The continental shelf is: a. the deepest part of the ocean b. fairly deep c. relatively shallow 4. True or False: The shallow water of the continental shelf is teeming with life. 5. The steep slope at the edge of th ...
Name Jordan Sullivan Date October 6, 2014 Period 1 Plate
... Subduction Zones and Volcanoes At some convergent boundaries, an oceanic plate collides with a continental plate. Oceanic crust tends to be denser and thinner than continental crust, so the denser oceanic crust gets bent and pulled under, or subducted beneath the lighter and thicker continental crus ...
... Subduction Zones and Volcanoes At some convergent boundaries, an oceanic plate collides with a continental plate. Oceanic crust tends to be denser and thinner than continental crust, so the denser oceanic crust gets bent and pulled under, or subducted beneath the lighter and thicker continental crus ...
CHAPTER 19 - PLATE TECTONICS
... theory of plate tectonics by the late 1960s. The earth's surface is visualized as divided into plates of either oceanic or a combination of oceanic and continental lithosphere (Figure 2.1) that move on the asthenosphere. Plate boundaries are described as diverging, converging or transform. Magnetic ...
... theory of plate tectonics by the late 1960s. The earth's surface is visualized as divided into plates of either oceanic or a combination of oceanic and continental lithosphere (Figure 2.1) that move on the asthenosphere. Plate boundaries are described as diverging, converging or transform. Magnetic ...
motions.of.tectonic.plates.activiity - wikifuller
... a. subduction zones c. convection currents b. transform faults d. divergent boundaries 2. The crust and upper mantle make up Earth's _____. a. lithosphere c. shield b. asthenosphere d. continents 3. The boundaries between two colliding plates are called _____. a. divergent c. a transform fault b. co ...
... a. subduction zones c. convection currents b. transform faults d. divergent boundaries 2. The crust and upper mantle make up Earth's _____. a. lithosphere c. shield b. asthenosphere d. continents 3. The boundaries between two colliding plates are called _____. a. divergent c. a transform fault b. co ...
Tectonics Quiz Topics
... Evidence of sea floor spreading shows that the ocean plates have moved away from the mid-ocean ridges over time. This has created new oceanic crust and moved the continental plates further apart. Explain how glacial deposits support the theory of plate tectonics. Glacial deposits on different contin ...
... Evidence of sea floor spreading shows that the ocean plates have moved away from the mid-ocean ridges over time. This has created new oceanic crust and moved the continental plates further apart. Explain how glacial deposits support the theory of plate tectonics. Glacial deposits on different contin ...
Abyssal plain
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest and least explored regions on Earth. Abyssal plains are key geologic elements of oceanic basins (the other elements being an elevated mid-ocean ridge and flanking abyssal hills). In addition to these elements, active oceanic basins (those that are associated with a moving plate tectonic boundary) also typically include an oceanic trench and a subduction zone.Abyssal plains were not recognized as distinct physiographic features of the sea floor until the late 1940s and, until very recently, none had been studied on a systematic basis. They are poorly preserved in the sedimentary record, because they tend to be consumed by the subduction process. The creation of the abyssal plain is the end result of spreading of the seafloor (plate tectonics) and melting of the lower oceanic crust. Magma rises from above the asthenosphere (a layer of the upper mantle) and as this basaltic material reaches the surface at mid-ocean ridges it forms new oceanic crust. This is constantly pulled sideways by spreading of the seafloor. Abyssal plains result from the blanketing of an originally uneven surface of oceanic crust by fine-grained sediments, mainly clay and silt. Much of this sediment is deposited by turbidity currents that have been channelled from the continental margins along submarine canyons down into deeper water. The remainder of the sediment is composed chiefly of pelagic sediments. Metallic nodules are common in some areas of the plains, with varying concentrations of metals, including manganese, iron, nickel, cobalt, and copper. These nodules may provide a significant resource for future mining ventures.Owing in part to their vast size, abyssal plains are currently believed to be a major reservoir of biodiversity. The abyss also exerts significant influence upon ocean carbon cycling, dissolution of calcium carbonate, and atmospheric CO2 concentrations over timescales of 100–1000 years. The structure and function of abyssal ecosystems are strongly influenced by the rate of flux of food to the seafloor and the composition of the material that settles. Factors such as climate change, fishing practices, and ocean fertilization are expected to have a substantial effect on patterns of primary production in the euphotic zone. This will undoubtedly impact the flux of organic material to the abyss in a similar manner and thus have a profound effect on the structure, function and diversity of abyssal ecosystems.