Oceans_I - Geophile.net
... – Submarine canyons are major features – Submarine canyons formed by: • River erosion • Turbidity currents ...
... – Submarine canyons are major features – Submarine canyons formed by: • River erosion • Turbidity currents ...
Plate Tectonics - Crafton Hills College
... ridges (what would later be called Divergent boundaries, where crust is created). This theory would supported by Paleomagnetic Studies, most notable the Polar Reversal studies of Morley (the first), and later Vine and Matthews. ...
... ridges (what would later be called Divergent boundaries, where crust is created). This theory would supported by Paleomagnetic Studies, most notable the Polar Reversal studies of Morley (the first), and later Vine and Matthews. ...
Plate Tectonics - Crafton Hills College
... ridges (what would later be called Divergent boundaries, where crust is created). This theory would supported by Paleomagnetic Studies, most notable the Polar Reversal studies of Morley (the first), and later Vine and Matthews. ...
... ridges (what would later be called Divergent boundaries, where crust is created). This theory would supported by Paleomagnetic Studies, most notable the Polar Reversal studies of Morley (the first), and later Vine and Matthews. ...
OBIS Report - Census of Marine Life Secretariat
... At the end of 2007, from 26 November 2007 to 4 February 2008, another expedition (ANDEEPSYSTCO) started from Cape Town to the Southern Ocean, trying to explore coupling processes between atmosphere, water column (plankton blooms) and deep-sea floor (seasonal pulses of nutrient influx). The expeditio ...
... At the end of 2007, from 26 November 2007 to 4 February 2008, another expedition (ANDEEPSYSTCO) started from Cape Town to the Southern Ocean, trying to explore coupling processes between atmosphere, water column (plankton blooms) and deep-sea floor (seasonal pulses of nutrient influx). The expeditio ...
Plate Tectonics
... break up about 200 million years ago. • Continents "drifted" to their present positions. ...
... break up about 200 million years ago. • Continents "drifted" to their present positions. ...
Environmental Geology – Fall 2005
... What lines of evidence did Wegener use to support his continental drift hypothesis? Why wasn’t his hypothesis widely accepted by the scientific community? What is apparent polar wander? How is it used to further support ‘drifting continents’? What lines of evidence support the seafloor spreadi ...
... What lines of evidence did Wegener use to support his continental drift hypothesis? Why wasn’t his hypothesis widely accepted by the scientific community? What is apparent polar wander? How is it used to further support ‘drifting continents’? What lines of evidence support the seafloor spreadi ...
plate tectonics - Science with Ms. Reathaford!
... Until the mid-1900’s, most scientists thought that the ocean floor, unlike the continents, was essentially flat. Many people had the misconceptions that oceanic crust was unchanging and was much older than continental crust. During the 1940’s and 1950’s however, technology advancements proved all of ...
... Until the mid-1900’s, most scientists thought that the ocean floor, unlike the continents, was essentially flat. Many people had the misconceptions that oceanic crust was unchanging and was much older than continental crust. During the 1940’s and 1950’s however, technology advancements proved all of ...
THE OCEAN FLOOR
... the Pacific Ocean the Atlantic Ocean the Indian Ocean, and the Arctic Ocean Pacific - The largest ocean - covers more than half the surface area on Earth. It is also the deepest Ocean reaching an average depth of 3940 ...
... the Pacific Ocean the Atlantic Ocean the Indian Ocean, and the Arctic Ocean Pacific - The largest ocean - covers more than half the surface area on Earth. It is also the deepest Ocean reaching an average depth of 3940 ...
Sea-Floor Spreading
... have a thin layer of crust above a layer of cool hard rocks. Most of them have both continental and oceanic crust. These tectonic plates fit together like joints made by a carpenter. There are about twelve large plates and a few smaller ones. They make up the earth's surface. ...
... have a thin layer of crust above a layer of cool hard rocks. Most of them have both continental and oceanic crust. These tectonic plates fit together like joints made by a carpenter. There are about twelve large plates and a few smaller ones. They make up the earth's surface. ...
Convection in the Mantle and The Theory of Plate Tectonics
... • Sea-Floor Spreading- the process by which molten material adds new oceanic crust to the ocean floor. • The sea floor spreads apart along both sides of a mid-ocean ridge (divergent boundary), as new crust is added. ...
... • Sea-Floor Spreading- the process by which molten material adds new oceanic crust to the ocean floor. • The sea floor spreads apart along both sides of a mid-ocean ridge (divergent boundary), as new crust is added. ...
Plate Tectonics Unit(poster)
... at the ridge and oldest the farthest away from the ridge *2 Basalt rock was found at the mid-ocean ridge, it comes from Volcanoes and makes the ocean floor of every ocean * 3 Ocean floor was found to be sinking below continents or other crust at the trenches… this process was named subduction ...
... at the ridge and oldest the farthest away from the ridge *2 Basalt rock was found at the mid-ocean ridge, it comes from Volcanoes and makes the ocean floor of every ocean * 3 Ocean floor was found to be sinking below continents or other crust at the trenches… this process was named subduction ...
Oceans cover much of Earth`s surface. They are so large that they
... Oceans cover much of Earth's surface. They are so large that they have many ecosystems. An ecosystem includes all the living and nonliving things in an area. Some ocean ecosystems are the shore, coral reef, open ocean, and deep sea. The shore ecosystem is where the ocean meets the land. Ocean waves ...
... Oceans cover much of Earth's surface. They are so large that they have many ecosystems. An ecosystem includes all the living and nonliving things in an area. Some ocean ecosystems are the shore, coral reef, open ocean, and deep sea. The shore ecosystem is where the ocean meets the land. Ocean waves ...
Continental Drift
... Wegener's hypothesis of continental drift was not widely accepted in his time because he could not explain how the continents might have moved. However, in the 1950's and 60's, scientists were able to connect all of the evidence and propose the Theory of Plate Tectonics. The final evidence needed to ...
... Wegener's hypothesis of continental drift was not widely accepted in his time because he could not explain how the continents might have moved. However, in the 1950's and 60's, scientists were able to connect all of the evidence and propose the Theory of Plate Tectonics. The final evidence needed to ...
Seafloor spreading ws
... The greatest challenge for mountain climbers is Mt. Everest, whose peak rises 8,872 meters above sea level. This is the highest mountain in the world, though many mountains around it are almost as high. Mt. Everest is in the Himalayas, a series of massive ranges that extends 2,500 kilometers across ...
... The greatest challenge for mountain climbers is Mt. Everest, whose peak rises 8,872 meters above sea level. This is the highest mountain in the world, though many mountains around it are almost as high. Mt. Everest is in the Himalayas, a series of massive ranges that extends 2,500 kilometers across ...
Plate Tectonics - Mrs. Robbins Earth Science
... • Climate: Fossils and rocks associated with different climates than present can be found in the layers of earth, and resemble those of other continents from a similar time period. ...
... • Climate: Fossils and rocks associated with different climates than present can be found in the layers of earth, and resemble those of other continents from a similar time period. ...
Ocean Floor
... continents and consist of massive wedges of sediment eroded from the land and deposited along the continental edge. The Continental Margin can be divided into three parts: the Continental shelf, the Continental slope, and the Continental rise. ...
... continents and consist of massive wedges of sediment eroded from the land and deposited along the continental edge. The Continental Margin can be divided into three parts: the Continental shelf, the Continental slope, and the Continental rise. ...
Plate Tectonics Study Guide – Key
... Pacific Coast of the United States? What landform is formed on top of a mantle plume hot spot? Which is more dense: old oceanic crust or young oceanic crust? Why? What are the two types of crust? What is an island arc and how is it related to plate tectonics? What is the place where two plates slip ...
... Pacific Coast of the United States? What landform is formed on top of a mantle plume hot spot? Which is more dense: old oceanic crust or young oceanic crust? Why? What are the two types of crust? What is an island arc and how is it related to plate tectonics? What is the place where two plates slip ...
TeachernotesL1 32.50KB 2017-03-29 12:41:27
... Largely composed of silicate rocks rich in iron and magnesium Upper mantle (close to the crust) is rigid and together with the crust forms the lithosphere Most of the mantle (asthenosphere) acts like it is semi-motlen. Temperatures near the core reach 5000oC High temperatures near the core are ...
... Largely composed of silicate rocks rich in iron and magnesium Upper mantle (close to the crust) is rigid and together with the crust forms the lithosphere Most of the mantle (asthenosphere) acts like it is semi-motlen. Temperatures near the core reach 5000oC High temperatures near the core are ...
AT24-05_Precis_130503 - University of California, Santa Cruz
... Seafloor hydrothermal circulation is… …the passage of warm (or hot) water through rock of the oceanic crust; …generally a result of heating from below, although it can also occur immediately adjacent to newly-erupted magma; …partly responsible for making the ocean "salty"; …thought likely to have o ...
... Seafloor hydrothermal circulation is… …the passage of warm (or hot) water through rock of the oceanic crust; …generally a result of heating from below, although it can also occur immediately adjacent to newly-erupted magma; …partly responsible for making the ocean "salty"; …thought likely to have o ...
Plate Tectonics “The Grand Unifying Theory”
... magma/rocks associated with deep plumes. • As seafloor moves over a hotspot, a chain of ocean islands and/or seamounts forms. • Dating of Hawaiian islands - Emperor Seamount chain showed systematic increase in ages going away from current volcanism. • Show direction and rate of plate motions. ...
... magma/rocks associated with deep plumes. • As seafloor moves over a hotspot, a chain of ocean islands and/or seamounts forms. • Dating of Hawaiian islands - Emperor Seamount chain showed systematic increase in ages going away from current volcanism. • Show direction and rate of plate motions. ...
1 Midterm Exam I September 26, 2:10 HW714
... activity and the processes of erosion and deposition. • Near shore, the features of the ocean floor are similar to those of the adjacent continents because they share the same granitic basement. The transition to basalt marks the edge of the continent and divides ocean floors into two major province ...
... activity and the processes of erosion and deposition. • Near shore, the features of the ocean floor are similar to those of the adjacent continents because they share the same granitic basement. The transition to basalt marks the edge of the continent and divides ocean floors into two major province ...
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.