Sea Floor Spreading LAB 2017
... continually been forming over millions of years at the mid-ocean ridges. Hess found that on each side of the ridge, sea floor got older as a person moved away from the ridge towards the continents. The older, denser oceanic crust eventually descends into deep trenches along the continents and is rec ...
... continually been forming over millions of years at the mid-ocean ridges. Hess found that on each side of the ridge, sea floor got older as a person moved away from the ridge towards the continents. The older, denser oceanic crust eventually descends into deep trenches along the continents and is rec ...
Ch. 1 Jeopardy
... North American plate are scraping past each other along the San Andreas Fault. Crust is not being formed or destroyed. ...
... North American plate are scraping past each other along the San Andreas Fault. Crust is not being formed or destroyed. ...
Earth Structure and Plate Tectonics
... Zone along the edge of the Pacific Ocean that has many volcanoes and earthquakes. This horseshoe-shaped belt stretches about 25,000 miles. ...
... Zone along the edge of the Pacific Ocean that has many volcanoes and earthquakes. This horseshoe-shaped belt stretches about 25,000 miles. ...
Unit 5: Plate Tectonics Review Guide Things you need to know for
... Theory of Continental Drift and Pangaea What are layers of earth and what the Lithosphereic plates move on What are the two types of lithospheric plates? Explain the difference between each (at least 3 differences)? What types of rocks make up continental and oceanic crust? What is a mid-ocean ridge ...
... Theory of Continental Drift and Pangaea What are layers of earth and what the Lithosphereic plates move on What are the two types of lithospheric plates? Explain the difference between each (at least 3 differences)? What types of rocks make up continental and oceanic crust? What is a mid-ocean ridge ...
Speciation PP - Blue Valley Schools
... Ruggedness of the Ocean Floor • Through development of sonar and more extensive use of submarines a picture of a rugged sea floor emerged (previously it was thought that the ocean floor was flat) • In fact, the Earth’s largest feature is the Mid-Atlantic Ridge running down the middle of the Atlanti ...
... Ruggedness of the Ocean Floor • Through development of sonar and more extensive use of submarines a picture of a rugged sea floor emerged (previously it was thought that the ocean floor was flat) • In fact, the Earth’s largest feature is the Mid-Atlantic Ridge running down the middle of the Atlanti ...
Dynamic Earth Interactive Notes Earth`s Structure Plate Tectonics
... Subduction Zone – The area where one plate is being pulled under the edge of another plate at a convergent boundary. Trench – a deep oceanic trench, or valley, that forms at a subduction zone as the oceanic crust sinks under the other tectonic plate. ...
... Subduction Zone – The area where one plate is being pulled under the edge of another plate at a convergent boundary. Trench – a deep oceanic trench, or valley, that forms at a subduction zone as the oceanic crust sinks under the other tectonic plate. ...
rifted margin
... The eastern North American continental margin is not a plate boundary. The continent/ocean boundary was created when Pangea rifted apart, creating a transition from continental to oceanic crust through extensional thinning and magmatic emplacement. This type of continental margin has historically be ...
... The eastern North American continental margin is not a plate boundary. The continent/ocean boundary was created when Pangea rifted apart, creating a transition from continental to oceanic crust through extensional thinning and magmatic emplacement. This type of continental margin has historically be ...
Oceans
... can respond to this pull by moving towards the sun and moon. • As the earth turns on its axis whatever part of the ocean is closest to the moon bulges towards it, and experiences high tide. ...
... can respond to this pull by moving towards the sun and moon. • As the earth turns on its axis whatever part of the ocean is closest to the moon bulges towards it, and experiences high tide. ...
Name
... Fill in the blank to complete each statement. 9. A scientific ____________________ is a well-tested concept that explains a wide range of observations. 10. Breaks in Earth’s crust where rocks have slipped past each other are called ____________________. 11. The lithosphere is broken into separate se ...
... Fill in the blank to complete each statement. 9. A scientific ____________________ is a well-tested concept that explains a wide range of observations. 10. Breaks in Earth’s crust where rocks have slipped past each other are called ____________________. 11. The lithosphere is broken into separate se ...
Ch. 20 The Ocean Basins
... Sources of Deep Ocean Sediment • Inorganic Sediments: Rock Particles – How do these rocks get to the ocean floor??? ...
... Sources of Deep Ocean Sediment • Inorganic Sediments: Rock Particles – How do these rocks get to the ocean floor??? ...
Continental Drift and Plate Tectonics Virtual Lab http://earthguide
... ___________________ the reflective surface, whether it’s the far wall of a canyon or the sea floor. 2) The Actual Depth Sound waves travel at about __________ meters per second in seawater, so a _____ second round trip covers ~6,000 meters. However, the actual water depth is only half of that- 3,000 ...
... ___________________ the reflective surface, whether it’s the far wall of a canyon or the sea floor. 2) The Actual Depth Sound waves travel at about __________ meters per second in seawater, so a _____ second round trip covers ~6,000 meters. However, the actual water depth is only half of that- 3,000 ...
Week 21: Plate Tectonics
... Spreading theories led to the current Plate Tectonic Theory a. If new ocean floor is being created at the Mid-Ocean Ridges as Harry Hess suggested, and the Earth isn’t getting any larger, then somewhere in the world old ocean crust must be getting destroyed SUBDUCTION. b. The mid-ocean ridges are ...
... Spreading theories led to the current Plate Tectonic Theory a. If new ocean floor is being created at the Mid-Ocean Ridges as Harry Hess suggested, and the Earth isn’t getting any larger, then somewhere in the world old ocean crust must be getting destroyed SUBDUCTION. b. The mid-ocean ridges are ...
Name
... Description of Plate Plate Movements Interaction At areas of sea floor spreading, mid-ocean ridges form where magma rising up creating new ocean crust that moves apart in opposite directions. An Oceanic Plate Collides with a Oceanic plates are Continental Plate Resulting in a denser than plates that ...
... Description of Plate Plate Movements Interaction At areas of sea floor spreading, mid-ocean ridges form where magma rising up creating new ocean crust that moves apart in opposite directions. An Oceanic Plate Collides with a Oceanic plates are Continental Plate Resulting in a denser than plates that ...
Name___________________________ Date: Plate Tectonics
... When an oceanic crust collides with a continental crust, the ocean crust sinks (subducts) because it is thinner and more dense. 8. What happens along a subduction zone? Subduction zones occur at a convergent boundary between an oceanic plate and continental plate. The more dense oceanic crust sinks. ...
... When an oceanic crust collides with a continental crust, the ocean crust sinks (subducts) because it is thinner and more dense. 8. What happens along a subduction zone? Subduction zones occur at a convergent boundary between an oceanic plate and continental plate. The more dense oceanic crust sinks. ...
Tect.EQ.Oceans.S04 - SC4 Geography MainPage
... Describe beach drift and identify at least one shoreline feature that may develop due to beach drift. (6 points) What is the difference between the theory of "Continental Drift" and the theory of Plate Tectonics? (3 points) _____________________________________________________________ ______________ ...
... Describe beach drift and identify at least one shoreline feature that may develop due to beach drift. (6 points) What is the difference between the theory of "Continental Drift" and the theory of Plate Tectonics? (3 points) _____________________________________________________________ ______________ ...
Explain how colliding tectonic plates influenced the formation of the
... • Caribbean plate slips under or subducts under North American and South American plates. • Melting takes place as plate subducts. • Magma rises to surface under pressure through cracks in the crust forming volcanic islands along the subduction zone. Pacific Ring of Fire With the aid of Figures 1 an ...
... • Caribbean plate slips under or subducts under North American and South American plates. • Melting takes place as plate subducts. • Magma rises to surface under pressure through cracks in the crust forming volcanic islands along the subduction zone. Pacific Ring of Fire With the aid of Figures 1 an ...
Plate Tectonics – Study Guide
... 1. A_____ W______ found evidence of continental drift. When he proposed this theory at first he could not identify the force that would move tectonic plates; other _____ did not accept his theory because he could not explain what could move such large plates. Later scientists linked the idea of c___ ...
... 1. A_____ W______ found evidence of continental drift. When he proposed this theory at first he could not identify the force that would move tectonic plates; other _____ did not accept his theory because he could not explain what could move such large plates. Later scientists linked the idea of c___ ...
Plate Tectonics
... mountain range in the world. • In 7 countries in South America Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, & Argentina. ...
... mountain range in the world. • In 7 countries in South America Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, & Argentina. ...
Sea Floor Spreading (SFS)
... The mid-ocean ridge is the long continuous mountain range that runs along the ocean floor. It begins at the North Pole and continues down into the Atlantic Ocean. Off the coast of Antarctica it travels into the Pacific Ocean where it splits into two as well as into the Indian Ocean around Africa and ...
... The mid-ocean ridge is the long continuous mountain range that runs along the ocean floor. It begins at the North Pole and continues down into the Atlantic Ocean. Off the coast of Antarctica it travels into the Pacific Ocean where it splits into two as well as into the Indian Ocean around Africa and ...
The Sea Floor
... About half covered with permanent ice Low species diversity Hallmark animals include polar bear and walrus ...
... About half covered with permanent ice Low species diversity Hallmark animals include polar bear and walrus ...
Ocean Landforms - Net Start Class
... •They are more than 84,000 kilometers (52,000 miles) in length and they extend through the North and South of the ...
... •They are more than 84,000 kilometers (52,000 miles) in length and they extend through the North and South of the ...
sci-10-18-1 - St John Brebeuf
... Yoho National Park, but you’ll find fossils of marine organisms high up in the Rockies near Field, B.C. (Figure 3). The Burgess Shale found in Yoho is fossil-bearing rock that was laid down underwater more than 500 million years ago at the edge of an oceanic plate. About 200 million years ago, as th ...
... Yoho National Park, but you’ll find fossils of marine organisms high up in the Rockies near Field, B.C. (Figure 3). The Burgess Shale found in Yoho is fossil-bearing rock that was laid down underwater more than 500 million years ago at the edge of an oceanic plate. About 200 million years ago, as th ...
File
... 1. The lithosphere is composed of which of the following: a. Upper mantle and crust b. Crust only c. Upper mantle only d. All layers of Earth except for the inner core 2. Which of the following is true of oceanic plates compared to continental plates? a. Oceanic plates tend to be much older b. Ocean ...
... 1. The lithosphere is composed of which of the following: a. Upper mantle and crust b. Crust only c. Upper mantle only d. All layers of Earth except for the inner core 2. Which of the following is true of oceanic plates compared to continental plates? a. Oceanic plates tend to be much older b. Ocean ...
Questions for the fifth quiz
... What kind of rock is found at the summit of Mt Everest? What happens to some of the crust when seafloor is subducted into a trench? Where do we now find ‘a large part of the rocky Mountains’? What is the geologic name for the ‘Hersey Kisses’ spread out around the Pacific seafloor? What geologic feat ...
... What kind of rock is found at the summit of Mt Everest? What happens to some of the crust when seafloor is subducted into a trench? Where do we now find ‘a large part of the rocky Mountains’? What is the geologic name for the ‘Hersey Kisses’ spread out around the Pacific seafloor? What geologic feat ...
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.