Ocean 11 - Course World
... spectacular deep-sea garden of hot springs and towering spires they nicknamed the 'Lost City’. "If this were on land," Duke University geologist Jeff Karson said, "it would be a national park." The scientists spotted the formations on Dec. 4 more than 3,200 feet below the frigid, stormy Atlantic dur ...
... spectacular deep-sea garden of hot springs and towering spires they nicknamed the 'Lost City’. "If this were on land," Duke University geologist Jeff Karson said, "it would be a national park." The scientists spotted the formations on Dec. 4 more than 3,200 feet below the frigid, stormy Atlantic dur ...
PLATE TECTONICS AND SEA-FLOOR SPREADING REVIEW
... CREATING MOUNTAINS (EX: HIMALAYAS CREATED BY INDIA COLLING WITH ASIA) 9. ___SUBDUCTION___ occurs when old oceanic crust is forced back into the mantle. 10. Where is new oceanic crust being formed? __AT MID OCEAN RIDGES (SEA- FLOOR SPREADING)_____ ...
... CREATING MOUNTAINS (EX: HIMALAYAS CREATED BY INDIA COLLING WITH ASIA) 9. ___SUBDUCTION___ occurs when old oceanic crust is forced back into the mantle. 10. Where is new oceanic crust being formed? __AT MID OCEAN RIDGES (SEA- FLOOR SPREADING)_____ ...
8th Grade Earth Science
... • When a tectonic plate with continental crust crashes into a tectonic plate with oceanic crust, the oceanic plate slides under the continental plate. • The region where oceanic lithosphere sinks into Asthenosphere is called a subduction zone. ...
... • When a tectonic plate with continental crust crashes into a tectonic plate with oceanic crust, the oceanic plate slides under the continental plate. • The region where oceanic lithosphere sinks into Asthenosphere is called a subduction zone. ...
Plate C Plate D
... Use the map on page 3 for the following questions and be sure to show your work. You will need a ruler and a calculator. If the line (upper left) is not 1 inch, you should reprint your handout with scaling turned off. Given that the distance between Points A and B is 4550 km, you should first calcul ...
... Use the map on page 3 for the following questions and be sure to show your work. You will need a ruler and a calculator. If the line (upper left) is not 1 inch, you should reprint your handout with scaling turned off. Given that the distance between Points A and B is 4550 km, you should first calcul ...
Plate Tectonics Lithosphere broken into plates 3 Types of plate
... http://csd.unl.edu/csd/resource/vol-13/oldrocks.htm ...
... http://csd.unl.edu/csd/resource/vol-13/oldrocks.htm ...
Plate Tectonics Unit Test
... b. igneous rocks are found on all continents. c. fossils of the same species of extinct land plants have been found in both South America and Africa d. early humans migrated to north American over a bridge form eastern Asia. 8. At the boundary between where a continental plate and an oceanic plate c ...
... b. igneous rocks are found on all continents. c. fossils of the same species of extinct land plants have been found in both South America and Africa d. early humans migrated to north American over a bridge form eastern Asia. 8. At the boundary between where a continental plate and an oceanic plate c ...
Plate Tec Review Sheet 2016 Answers
... CREATING MOUNTAINS (EX: HIMALAYAS CREATED BY INDIA COLLING WITH ASIA) 9. ___SUBDUCTION___ occurs when old oceanic crust is forced back into the mantle. 10. Where is new oceanic crust being formed? __AT MID OCEAN RIDGES (SEA- FLOOR SPREADING)_____ ...
... CREATING MOUNTAINS (EX: HIMALAYAS CREATED BY INDIA COLLING WITH ASIA) 9. ___SUBDUCTION___ occurs when old oceanic crust is forced back into the mantle. 10. Where is new oceanic crust being formed? __AT MID OCEAN RIDGES (SEA- FLOOR SPREADING)_____ ...
Chapter 14
... • Pelagic zone – open ocean of any depth • Benthic zone – includes any sea-bottom surface • Abyssal zone – a subdivision of the benthic zone • Deep • Extremely high water pressure • Low temperatures ...
... • Pelagic zone – open ocean of any depth • Benthic zone – includes any sea-bottom surface • Abyssal zone – a subdivision of the benthic zone • Deep • Extremely high water pressure • Low temperatures ...
Plate Tectonic Theory
... • Plate Tectonics Theory combines continental drift & seafloor spreading • Lithosphere floats on denser, liquid rock in mantle called asthenosphere. • Lithosphere broken into tectonic plates • Tectonic plates move about 1-8 cm/yr • This movement is the “continental drift” referred to by Wegener ...
... • Plate Tectonics Theory combines continental drift & seafloor spreading • Lithosphere floats on denser, liquid rock in mantle called asthenosphere. • Lithosphere broken into tectonic plates • Tectonic plates move about 1-8 cm/yr • This movement is the “continental drift” referred to by Wegener ...
Mantle_1
... Mid Atlantic ridge • Molloy Ridge (west of northern Svalbard) • Vestnesa Ridge (west of Svalbard) • Knipovich Ridge (~ 73.5°N, 8°E to Fram Strait west of Svalbard) ...
... Mid Atlantic ridge • Molloy Ridge (west of northern Svalbard) • Vestnesa Ridge (west of Svalbard) • Knipovich Ridge (~ 73.5°N, 8°E to Fram Strait west of Svalbard) ...
Plate Tectonics II - Clark Science Center
... According to this model, subducted slabs of oceanic lithosphere sink through the 660-km boundary between the asthenosphere and lower mantle, all the way down to the core-mantle boundary, where they melt. ...
... According to this model, subducted slabs of oceanic lithosphere sink through the 660-km boundary between the asthenosphere and lower mantle, all the way down to the core-mantle boundary, where they melt. ...
Ocean waves that wear away an island`s shoreline
... 7. In the asthenosphere, heat is transferred as soft rock flows slowly in cycles known as convection currents 8. Wegner believed the continents had once been joined in one landmass called Pangaea 9. The theory of continental drift states all the continents once were joined as a single supercontinent ...
... 7. In the asthenosphere, heat is transferred as soft rock flows slowly in cycles known as convection currents 8. Wegner believed the continents had once been joined in one landmass called Pangaea 9. The theory of continental drift states all the continents once were joined as a single supercontinent ...
Salinity of Ocean water Salty ocean waters constitute 97% of all the
... Why is the ocean water salty? Salt in the ocean comes from two sources; from rocks on land and from vents down below in the oceanic crust. Rainwater, slightly acidic (carbonic) acts on the rocks and carries dissolved salts and minerals to rivers and streams which join the ocean. The minerals combine ...
... Why is the ocean water salty? Salt in the ocean comes from two sources; from rocks on land and from vents down below in the oceanic crust. Rainwater, slightly acidic (carbonic) acts on the rocks and carries dissolved salts and minerals to rivers and streams which join the ocean. The minerals combine ...
USGS - Developing the Theory Continental drift was hotly debated
... was much more rugged than previously thought. Such echosounding measurements clearly demonstrated the continuity and roughness of the submarine mountain chain in the central Atlantic (later called the Mid-Atlantic Ridge) suggested by the earlier ...
... was much more rugged than previously thought. Such echosounding measurements clearly demonstrated the continuity and roughness of the submarine mountain chain in the central Atlantic (later called the Mid-Atlantic Ridge) suggested by the earlier ...
OCEANS
... 4. Compare the amount of water in the Gulf Stream to the Mississippi River. 5. Explain how surface ocean currents carry heat from place to place in the Earth ...
... 4. Compare the amount of water in the Gulf Stream to the Mississippi River. 5. Explain how surface ocean currents carry heat from place to place in the Earth ...
The Lithosphere… - Mr Vincent Science
... 1. Why do you think the asthenosphere is described as being plastic in nature? ...
... 1. Why do you think the asthenosphere is described as being plastic in nature? ...
File
... • Continents float on the mantle like icebergs • Ocean crusts float on the mantle, but not as high (why continents are dry) • Oceanic crust is much thinner than continental crust. ...
... • Continents float on the mantle like icebergs • Ocean crusts float on the mantle, but not as high (why continents are dry) • Oceanic crust is much thinner than continental crust. ...
Lecture 5 - Plate Tectonics and Rocks
... – First layer is marine sediment of various composition and thickness (extensively sampled) – Second layer is pillow basalt overlying basaltic ...
... – First layer is marine sediment of various composition and thickness (extensively sampled) – Second layer is pillow basalt overlying basaltic ...
Dynamic Ocean Floor
... • Two plates move away from one another. • This is a zone of weakness. • As two plates move apart at the mid-ocean ridges, magma from the mantle up wells through a crack in the oceanic crust and cooled by the sea creating new ocean floor. • Energy is released in the form of earthquakes. • Shallow fo ...
... • Two plates move away from one another. • This is a zone of weakness. • As two plates move apart at the mid-ocean ridges, magma from the mantle up wells through a crack in the oceanic crust and cooled by the sea creating new ocean floor. • Energy is released in the form of earthquakes. • Shallow fo ...
8.1 Earth has several layers
... (land and land) • continental-continental collision—occurs where two plates carrying continental crust push together • Because both crusts are the same density, neither plate can sink beneath the other • Their edges crumple and fold • Sometimes the folds can be pushed up and form mountains http://em ...
... (land and land) • continental-continental collision—occurs where two plates carrying continental crust push together • Because both crusts are the same density, neither plate can sink beneath the other • Their edges crumple and fold • Sometimes the folds can be pushed up and form mountains http://em ...
What`s Down There?
... floor plunges steeply. Marks the boundary between the oceanic crust and continental crust. Continental rise: separates the continental shelf from the ocean floor. ...
... floor plunges steeply. Marks the boundary between the oceanic crust and continental crust. Continental rise: separates the continental shelf from the ocean floor. ...
Plate Tectonic Notes
... through the ___________________________ toward surface, causing the convection currents, ___________________________ •____________________________ -string of undersea divergent boundaries where new ocean crust is formed. •These are called spreading centers and are associated with mountainous areas o ...
... through the ___________________________ toward surface, causing the convection currents, ___________________________ •____________________________ -string of undersea divergent boundaries where new ocean crust is formed. •These are called spreading centers and are associated with mountainous areas o ...
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.