Convergent Boundaries - Colliding Plates
... Summary: At convergent boundaries, tectonic plates collide with each other. The events that occur at these boundaries are linked to the types of plates – oceanic or continental – that are interacting. Subduction Zones and Volcanoes Oceanic crust tends to be ______________________ and ____________ ...
... Summary: At convergent boundaries, tectonic plates collide with each other. The events that occur at these boundaries are linked to the types of plates – oceanic or continental – that are interacting. Subduction Zones and Volcanoes Oceanic crust tends to be ______________________ and ____________ ...
Plate Tectonics PowerPoint
... causing it to sink into the mantle forming a subduction zone. • The subducting plate is bent downward to form a very deep depression in the ocean floor called a deep-sea trench. • The deepest parts of the ocean are found along trenches. – The Mariana Trench is 11 km deep! ...
... causing it to sink into the mantle forming a subduction zone. • The subducting plate is bent downward to form a very deep depression in the ocean floor called a deep-sea trench. • The deepest parts of the ocean are found along trenches. – The Mariana Trench is 11 km deep! ...
Mid-ocean ridges
... These movements result in many of the structural features we see on Earth, like mountains, trenches and ocean basins Plate movement also shapes continents, for example leading to formation of mountains like the Himalayas ...
... These movements result in many of the structural features we see on Earth, like mountains, trenches and ocean basins Plate movement also shapes continents, for example leading to formation of mountains like the Himalayas ...
How accurately can we measure density within the Earth?
... convecting adiabatic mantle interior ...
... convecting adiabatic mantle interior ...
Continental Drift PP
... remains on the different continent suggests particular connections between the continents in the past ...
... remains on the different continent suggests particular connections between the continents in the past ...
Continental Drift
... Tectonic plates Can be either or both oceanic and continental crusts 15 major plates Earthquakes – sudden shifts along plate boundaries Volcanoes – plate motions generate magma that erupts ...
... Tectonic plates Can be either or both oceanic and continental crusts 15 major plates Earthquakes – sudden shifts along plate boundaries Volcanoes – plate motions generate magma that erupts ...
Plate Tectonics – study of crustal movement, and the
... 3) Continental : Oceanic mountain ranges above subduction zone. Example: Cascades (Washington to California) and Andes (South America) ...
... 3) Continental : Oceanic mountain ranges above subduction zone. Example: Cascades (Washington to California) and Andes (South America) ...
Theory of Plate Tectonics
... • A convergent boundary is the place where 2 plates come together resulting in a collision that can bring together. – Oceanic crust and oceanic crust – Oceanic and Continental – Continental and continental ...
... • A convergent boundary is the place where 2 plates come together resulting in a collision that can bring together. – Oceanic crust and oceanic crust – Oceanic and Continental – Continental and continental ...
Document
... oceanic crust between a spreading mid-ocean ridge and the trench it disappears into. These make up 30% of the ...
... oceanic crust between a spreading mid-ocean ridge and the trench it disappears into. These make up 30% of the ...
test - Scioly.org
... 4. The asthenosphere consists of the mantle and lower crust. 5. The asthenosphere is composed primarily of magma. 6. Oceanic-oceanic convergent plate boundaries result in submarine orogenic belts. 7. P-waves are detectable at the point of the Earth opposite from an earthquake’s epicenter. For questi ...
... 4. The asthenosphere consists of the mantle and lower crust. 5. The asthenosphere is composed primarily of magma. 6. Oceanic-oceanic convergent plate boundaries result in submarine orogenic belts. 7. P-waves are detectable at the point of the Earth opposite from an earthquake’s epicenter. For questi ...
(>8.0 magnitude, past 100 yrs) Active Volcanoes
... Directions- use small balls of modeling clay to plot recent earthquakes and active volcanoes on a large map of the Earth. Once all points have been plotted, compare your plotted points to a map of tectonic plate boundaries to answer the Key Questions at the bottom of this page. ...
... Directions- use small balls of modeling clay to plot recent earthquakes and active volcanoes on a large map of the Earth. Once all points have been plotted, compare your plotted points to a map of tectonic plate boundaries to answer the Key Questions at the bottom of this page. ...
Earth Science Vocabulary
... 7. Core – Earth’s innermost layer (center) a.) outer is composed of liquid iron & nickel b.) inner is composed of solid iron & nickel 8. Crust – Earth’s outermost layer (thinnest layer) a.) continental is found under the continents, composed of granite b.) oceanic is found under the oceans, composed ...
... 7. Core – Earth’s innermost layer (center) a.) outer is composed of liquid iron & nickel b.) inner is composed of solid iron & nickel 8. Crust – Earth’s outermost layer (thinnest layer) a.) continental is found under the continents, composed of granite b.) oceanic is found under the oceans, composed ...
ocean ridge - deb-or-ah
... • Slow-spreading ridges like the Mid-Atlantic Ridge have large, wide, rift valleys, sometimes as wide as 6 to 12 miles and very rugged terrain at the crest. The Mid-Atlantic Ridge moves at an average of 1 inch per year. ...
... • Slow-spreading ridges like the Mid-Atlantic Ridge have large, wide, rift valleys, sometimes as wide as 6 to 12 miles and very rugged terrain at the crest. The Mid-Atlantic Ridge moves at an average of 1 inch per year. ...
Unit 3: Plate Tectonics: Test Review
... DENSITY in the mantle which is thought to be the force behind plate tectonics. 12. Is hot water more or less dense than cold water? Less dense 13. What causes magma to rise to the surface? Heat and Density. 14. What causes Earth’s plates to move? Convection Currents 15. What could cause the plates t ...
... DENSITY in the mantle which is thought to be the force behind plate tectonics. 12. Is hot water more or less dense than cold water? Less dense 13. What causes magma to rise to the surface? Heat and Density. 14. What causes Earth’s plates to move? Convection Currents 15. What could cause the plates t ...
Evidence of Plate Tectonics
... another strip of rock has reversed polarity (north pole of the rock face the south pole of the Earth) Therefore: Each strip that has a different polarity had to be formed at different time – supports sea floor spreading ...
... another strip of rock has reversed polarity (north pole of the rock face the south pole of the Earth) Therefore: Each strip that has a different polarity had to be formed at different time – supports sea floor spreading ...
Inner Structure of the Earth 3. Mantle
... and form a subduction zone. *If an oceanic plate collides with a continental plate, the heavier oceanic plate will slide under the lighter, continental plate. Results: volcanic mountain building and earthquakes. ...
... and form a subduction zone. *If an oceanic plate collides with a continental plate, the heavier oceanic plate will slide under the lighter, continental plate. Results: volcanic mountain building and earthquakes. ...
Earth Layers and PT study guide ANSWERS
... Subduction does not occur at a large rate at continental-continental boundaries because of the similarities in composition and density. Additionally, the two plates are pushed upwards to form mountains. ...
... Subduction does not occur at a large rate at continental-continental boundaries because of the similarities in composition and density. Additionally, the two plates are pushed upwards to form mountains. ...
Plate Tectonics
... will summarize the theory of plate tectonics. I will identify and describe the three types of plate boundaries. I will list and describe three causes of plate movement. ...
... will summarize the theory of plate tectonics. I will identify and describe the three types of plate boundaries. I will list and describe three causes of plate movement. ...
Ch 5 S 4 Sea-Floor Spreading
... c. Subduction and Earth’s Oceans i. Subduction and sea-floor spreading can change the size and shape of the oceans ii. The ocean floor is renewed about every 200 million years iii.The Pacific Ocean covers almost 1/3 of Earth 1. It is shrinking 2. Sometimes a deep ocean trench swallows more oceanic ...
... c. Subduction and Earth’s Oceans i. Subduction and sea-floor spreading can change the size and shape of the oceans ii. The ocean floor is renewed about every 200 million years iii.The Pacific Ocean covers almost 1/3 of Earth 1. It is shrinking 2. Sometimes a deep ocean trench swallows more oceanic ...
Plate Tectonics
... Salt deposits in Northern States --salt forms in tropical regions -- area was once warmer ...
... Salt deposits in Northern States --salt forms in tropical regions -- area was once warmer ...
PPT - Chapter 2: Plate Tectonics & The Ocean Floor
... Divergent Plate Boundaries • Mid-ocean ridges form along divergent boundaries. • Magma pushes continental crust up causing it to break apart. • Plates begin to move apart in opposite directions causing crustal material to slump downward, creating a rift valley. ...
... Divergent Plate Boundaries • Mid-ocean ridges form along divergent boundaries. • Magma pushes continental crust up causing it to break apart. • Plates begin to move apart in opposite directions causing crustal material to slump downward, creating a rift valley. ...
Earth`s Structure and Tectonics Overview 2014
... 10. Sea floor spreading (at divergent boundary points A, B, D) results in the creation of new crust. However, the Earth’s total surface area stays the same. Look at points C. and E. where there is a convergent boundary. How could what is happening here explain why the sea floor spreading does not re ...
... 10. Sea floor spreading (at divergent boundary points A, B, D) results in the creation of new crust. However, the Earth’s total surface area stays the same. Look at points C. and E. where there is a convergent boundary. How could what is happening here explain why the sea floor spreading does not re ...
Plate Tectonics Summary - Leigh
... The locations of the plate boundaries can be seen by mapping the locations of the Earth’s volcanoes and earthquakes. Divergent plate boundaries are where two plates move apart. Early on this divergence creates a rift zone (or rift valley on land) where the surface breaks and drops as the two plates ...
... The locations of the plate boundaries can be seen by mapping the locations of the Earth’s volcanoes and earthquakes. Divergent plate boundaries are where two plates move apart. Early on this divergence creates a rift zone (or rift valley on land) where the surface breaks and drops as the two plates ...
Extreme Trapping O
... long-term (hundreds of millions of years) when, following a ments. For those who use sediments traps, two long trip to the deep seafloor, the carbon of their dead examples of difficult environments are bodies is absorbed into Earth’s crust the deepest oceans and the permaby the plate tectonic proces ...
... long-term (hundreds of millions of years) when, following a ments. For those who use sediments traps, two long trip to the deep seafloor, the carbon of their dead examples of difficult environments are bodies is absorbed into Earth’s crust the deepest oceans and the permaby the plate tectonic proces ...
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.