Slide 1
... South America fit exactly against the west coast of Africa, as if they had once been joined?” (1910, letter to his fiancee) ...
... South America fit exactly against the west coast of Africa, as if they had once been joined?” (1910, letter to his fiancee) ...
Plate Tectonics and Deformation of the Crust
... dense so it sinks into the asthenosphere and “pulls” the trailing lithosphere along. ...
... dense so it sinks into the asthenosphere and “pulls” the trailing lithosphere along. ...
Convection current
... sinks beneath the continental plate (subduction) and forms a trench (a narrow, deep valley along the ocean floor). • Subduction- the process by which oceanic crust sinks beneath a less dense plate. ...
... sinks beneath the continental plate (subduction) and forms a trench (a narrow, deep valley along the ocean floor). • Subduction- the process by which oceanic crust sinks beneath a less dense plate. ...
EPSS 15 Introduction to Oceanography – Spring 2017 Physiography
... Submarine canyons are steep-walled, V-shaped valleys that incise into continental shelves and slopes and open out at depth onto the continental rise. Most submarine canyons are associated with the mouths of large rivers. Although their origin is still debated, submarine canyons are important here be ...
... Submarine canyons are steep-walled, V-shaped valleys that incise into continental shelves and slopes and open out at depth onto the continental rise. Most submarine canyons are associated with the mouths of large rivers. Although their origin is still debated, submarine canyons are important here be ...
Homework Nov 28-Dec 2 - Avery County Schools
... Word Bank: subscript, reactants, products, coefficient, law of conservation of matter, law of conservation of mass, atoms. The _______ of ___________ of ______________ states that Matter cannot be created or destroyed. This is supported by the number of ________ correctly balanced in a chemical equa ...
... Word Bank: subscript, reactants, products, coefficient, law of conservation of matter, law of conservation of mass, atoms. The _______ of ___________ of ______________ states that Matter cannot be created or destroyed. This is supported by the number of ________ correctly balanced in a chemical equa ...
Focus Question - WordPress.com
... ____5___ Old ocean crust gets “recycled” as it turns back into molten material in the asthenosphere ...
... ____5___ Old ocean crust gets “recycled” as it turns back into molten material in the asthenosphere ...
Subduction Zone Divergent Plate Boundary
... Alaska - the Alaska Range - Mt. Spur, Mt. Augustine, etc. West coast of Central and South America - Andes Mtns. Western Pacific (oceanic crust on overriding plate) - Phillipines, Japan. ...
... Alaska - the Alaska Range - Mt. Spur, Mt. Augustine, etc. West coast of Central and South America - Andes Mtns. Western Pacific (oceanic crust on overriding plate) - Phillipines, Japan. ...
THE LITHOSPERE AND PLATE TECTONICS The layer of the
... The layer of the mantle above the asthenosphere plus the entire crust make up a region called the lithosphere. The lithosphere, and therefore, the earth's crust, is not a continuous shell, but is broken into a series of plates that independently "float" upon the asthenosphere, much like a raft on th ...
... The layer of the mantle above the asthenosphere plus the entire crust make up a region called the lithosphere. The lithosphere, and therefore, the earth's crust, is not a continuous shell, but is broken into a series of plates that independently "float" upon the asthenosphere, much like a raft on th ...
1-5 Review and Reinforce
... 4. Describe what happens when a. two plates carrying oceanic crust collide, b. two plates carrying continental crust collide, and c. a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent to ...
... 4. Describe what happens when a. two plates carrying oceanic crust collide, b. two plates carrying continental crust collide, and c. a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent to ...
Chapter 9 Plate Tectonics
... the ocean ridges, is among the strongest _______________ of seafloor spreading. Earthquake _______________ Scientists found a close link between deep-focus earthquakes and ocean _______________. The _______________ of deep-focus earthquakes along the oceanic ridge system was shown to be consiste ...
... the ocean ridges, is among the strongest _______________ of seafloor spreading. Earthquake _______________ Scientists found a close link between deep-focus earthquakes and ocean _______________. The _______________ of deep-focus earthquakes along the oceanic ridge system was shown to be consiste ...
plate - PAMS-Doyle
... Evidence Glossopteris, located in 250 myo rocks, were found in South Africa, Australia, India, and Antarctica ...
... Evidence Glossopteris, located in 250 myo rocks, were found in South Africa, Australia, India, and Antarctica ...
Testing Plate Tectonics & Mechanisms of Plate Motion
... deep-sea drilling into the sediments on the ocean floor The data on the ages of seafloor sediment confirmed what the seafloor spreading hypothesis predicted The youngest oceanic crust is at the ridge crest and the oldest oceanic crust is at the continental margins No sediment older than 180 mi ...
... deep-sea drilling into the sediments on the ocean floor The data on the ages of seafloor sediment confirmed what the seafloor spreading hypothesis predicted The youngest oceanic crust is at the ridge crest and the oldest oceanic crust is at the continental margins No sediment older than 180 mi ...
Chapter 18
... • Forces that drive continental movement – magma convection currents – midocean ridges form along cracks where magma breaks through the crust – at subduction zones, old crust sinks into the mantle where it is recycled – seafloor spreading causes continental drift ...
... • Forces that drive continental movement – magma convection currents – midocean ridges form along cracks where magma breaks through the crust – at subduction zones, old crust sinks into the mantle where it is recycled – seafloor spreading causes continental drift ...
6.5 NOTES What causes plate tectonics? Objective: Describe the
... What causes plate tectonics? Objective: Describe the causes of plate tectonics ...
... What causes plate tectonics? Objective: Describe the causes of plate tectonics ...
Plate Tectonics - THS Aquatic Science
... – 47,000 miles long running down the middle of the Atlantic Ocean (surfacing at Iceland), around Africa, through the Indian Ocean, between Australia and Antarctica, and north through the Pacific Ocean. ...
... – 47,000 miles long running down the middle of the Atlantic Ocean (surfacing at Iceland), around Africa, through the Indian Ocean, between Australia and Antarctica, and north through the Pacific Ocean. ...
Introduction to Plate Tectonics
... – a great mountain range on the ocean floor, the global mid-ocean ridge, encircled the Earth. • more than 50,000 kilometers (km) long and up to 1000 km across • zig-zags between the continents • Rising about 4,500 meters(m) above the sea floor, – Taller than all mountains in the US except for Mount ...
... – a great mountain range on the ocean floor, the global mid-ocean ridge, encircled the Earth. • more than 50,000 kilometers (km) long and up to 1000 km across • zig-zags between the continents • Rising about 4,500 meters(m) above the sea floor, – Taller than all mountains in the US except for Mount ...
Chapter 3
... The process by which molten material adds new oceanic crust to the ocean floor Sea-floor spreading The process by which oceanic crust sinks beneath a deep-ocean trench and back into Subduction the mantle at a convergent plate boundary Mid-Ocean Ridges- long chains of mountains rising from the ocean ...
... The process by which molten material adds new oceanic crust to the ocean floor Sea-floor spreading The process by which oceanic crust sinks beneath a deep-ocean trench and back into Subduction the mantle at a convergent plate boundary Mid-Ocean Ridges- long chains of mountains rising from the ocean ...
Plate tectonics “Quest”: Tuesday January 15, 2011
... Glomar Challenger 1968- drilled sediment core samples east and west of the Mid-Atlantic Ridge. o Evidence supported seafloor spreading- age of sediments were older further from the ridge and sediments were thicker further from the ridge JOIDES Resolution 1996- drilled sediment core samples east ...
... Glomar Challenger 1968- drilled sediment core samples east and west of the Mid-Atlantic Ridge. o Evidence supported seafloor spreading- age of sediments were older further from the ridge and sediments were thicker further from the ridge JOIDES Resolution 1996- drilled sediment core samples east ...
Plate Boundaries Power Point
... Divergent boundaries build chains of volcanoes and rift valleys called a mid-ocean ridge. Mid-ocean ridges are found in the oceans-they are like mountain ranges on the ocean floor created by the new lava that is bubbling up! Little by little, as each batch of molten rock erupts at the mid-ocean rid ...
... Divergent boundaries build chains of volcanoes and rift valleys called a mid-ocean ridge. Mid-ocean ridges are found in the oceans-they are like mountain ranges on the ocean floor created by the new lava that is bubbling up! Little by little, as each batch of molten rock erupts at the mid-ocean rid ...
File - Science Source
... 7. Describe what happens when a plate carrying oceanic crust collides with a plate carrying continental crust. ...
... 7. Describe what happens when a plate carrying oceanic crust collides with a plate carrying continental crust. ...
Plate Tectonics Vocabulary Continental Drift The
... The hypothesis that the continents slowly move across Earth’s Surface A plate boundary where two plants move toward each other A deep valley along the ocean floor which oceanic crust slowly sinks toward the mantle A plate boundary where two plates move away from each other A break or crack in Earth’ ...
... The hypothesis that the continents slowly move across Earth’s Surface A plate boundary where two plants move toward each other A deep valley along the ocean floor which oceanic crust slowly sinks toward the mantle A plate boundary where two plates move away from each other A break or crack in Earth’ ...
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.