ENVI 21 Life in the Ocean
... Lithosphere made up of lithospheric plates Plates may contain continental crust, oceanic crust, or both Plates rest on asthenosphere (plastic upper mantle) Plate boundaries correspond to locations of mid-ocean ridges and to trenches Not all plates completely characterized yet ...
... Lithosphere made up of lithospheric plates Plates may contain continental crust, oceanic crust, or both Plates rest on asthenosphere (plastic upper mantle) Plate boundaries correspond to locations of mid-ocean ridges and to trenches Not all plates completely characterized yet ...
Part 2 - cosee now
... What potential problems result from commercial fishing for species low in the food web? (A) ...
... What potential problems result from commercial fishing for species low in the food web? (A) ...
copy all questions - Catawba County Schools
... spreading. As plates made of oceanic crust pull apart, a crack in the ocean floor appears. Magma then oozes up from the mantle to fill in the space between the plates, forming a raised ridge called a mid-ocean ridge. The magma also spreads outward, forming new ocean floor and new oceanic crust. 14. ...
... spreading. As plates made of oceanic crust pull apart, a crack in the ocean floor appears. Magma then oozes up from the mantle to fill in the space between the plates, forming a raised ridge called a mid-ocean ridge. The magma also spreads outward, forming new ocean floor and new oceanic crust. 14. ...
LAYERS OF THE EARTH
... crust) to 25 miles (continental crust). The crust is more dense under the ocean and less dense under the continents. The oceanic crust is mostly composed of basalt. The continental crust is mainly made of granite. The crust temperature is up to 930 degrees Farenheit. 3. asthenosphere – the layer of ...
... crust) to 25 miles (continental crust). The crust is more dense under the ocean and less dense under the continents. The oceanic crust is mostly composed of basalt. The continental crust is mainly made of granite. The crust temperature is up to 930 degrees Farenheit. 3. asthenosphere – the layer of ...
At a destructive plate boundary
... Continental crust at over 1,500 million years old is much older than the oceanic crust at less than 200 million years old. ...
... Continental crust at over 1,500 million years old is much older than the oceanic crust at less than 200 million years old. ...
Guided Notes on the Theory of Plate Tectonics
... The earth’s crust and rigid upper mantle are broken into enormous slabs called plates. These plates move in different directions and at different speeds and this movement is caused by the Earth’s internal heat. ...
... The earth’s crust and rigid upper mantle are broken into enormous slabs called plates. These plates move in different directions and at different speeds and this movement is caused by the Earth’s internal heat. ...
“Continental Drift and Plate Tectonics Study Guide”
... states that magma travels to the earth’s surface. The magma forms cracks in the ocean floor. The magma pushes out of the cracks. Magma piles up and forms mid-ocean ridges. As the magma hardens it pushes the layers of the ocean floor away from the mid-ocean ridge. The process then repeats it self. Pr ...
... states that magma travels to the earth’s surface. The magma forms cracks in the ocean floor. The magma pushes out of the cracks. Magma piles up and forms mid-ocean ridges. As the magma hardens it pushes the layers of the ocean floor away from the mid-ocean ridge. The process then repeats it self. Pr ...
Oceanography_PowerPoint
... *Gold from our oceans? Yes, gold is present is very low concentrations, but not economic enough to actually "mine" for profit. Many tons of water and sediment would have to be processed in order to get a single ounce of gold. Our Layered Oceans: *Temperature and salinity vary with depth in our ocea ...
... *Gold from our oceans? Yes, gold is present is very low concentrations, but not economic enough to actually "mine" for profit. Many tons of water and sediment would have to be processed in order to get a single ounce of gold. Our Layered Oceans: *Temperature and salinity vary with depth in our ocea ...
Earthquake Depth Data - Hillview Middle School
... On the graph on page 2, plot the data for Tonga and Chile trenches from the table. DON’T CONNECT THE DOTS, wait for teacher’s ok to do so. Assume the lines outline the converging plates Label the approximate location of the Tonga and Chile trenches on the graph Using your Plate Boundary Map, i ...
... On the graph on page 2, plot the data for Tonga and Chile trenches from the table. DON’T CONNECT THE DOTS, wait for teacher’s ok to do so. Assume the lines outline the converging plates Label the approximate location of the Tonga and Chile trenches on the graph Using your Plate Boundary Map, i ...
MARINE SCIENCE SEMESTER I REVIEW OCEAN EXPLORATION
... 5. How did the studies performed by the H.M.S. Challenger expedition influence the field of Marine Science? ...
... 5. How did the studies performed by the H.M.S. Challenger expedition influence the field of Marine Science? ...
TOPICS: Earthquakes Plate Movement and Boundaries Landforms
... You should be able to: Describe how the theory of seafloor spreading proved Alfred’s Continental Drift hypothesis. Describe the four (4) pieces of evidence (mid-ocean ridges, temperature of oceanic crust, age of oceanic crust, magnetic signatures) that explain seafloor spreading. KEY VOCAB: seafloor ...
... You should be able to: Describe how the theory of seafloor spreading proved Alfred’s Continental Drift hypothesis. Describe the four (4) pieces of evidence (mid-ocean ridges, temperature of oceanic crust, age of oceanic crust, magnetic signatures) that explain seafloor spreading. KEY VOCAB: seafloor ...
VOLCANIC FEATURES OF THE CENTRAL ATLANTIC OCEAN
... fractures for hundreds of km, but they were not interconnected between suites and swarms. There is no evidence for domal uplift over a “plume center,” and there is no “tail trail” of Jurassic hotspot volcanoes or ocean ridge that proceeds away from any plume center. Rather than becoming dormant and ...
... fractures for hundreds of km, but they were not interconnected between suites and swarms. There is no evidence for domal uplift over a “plume center,” and there is no “tail trail” of Jurassic hotspot volcanoes or ocean ridge that proceeds away from any plume center. Rather than becoming dormant and ...
PLATE TECHTONICS
... forces that are available to drive the plates include the following: ridge push, trench pull, slab pull, viscous drag at the base of the plate, and the Eötvös force. The graph above indicates that the fastest plates on Earth, like the Juan de Fuca, Pacific, Philippines, and Cocos Plates, are oceanic ...
... forces that are available to drive the plates include the following: ridge push, trench pull, slab pull, viscous drag at the base of the plate, and the Eötvös force. The graph above indicates that the fastest plates on Earth, like the Juan de Fuca, Pacific, Philippines, and Cocos Plates, are oceanic ...
Lecture 1a Plate Tectonics
... Convection in the SOLID(ish) mantle moves the tectonic plates (pieces of lithosphere) around on the surface and is responsible for most geologic activity, such as volcanoes, earthquakes, and the like. ...
... Convection in the SOLID(ish) mantle moves the tectonic plates (pieces of lithosphere) around on the surface and is responsible for most geologic activity, such as volcanoes, earthquakes, and the like. ...
Tectonic Plate Notes (M)
... *subduction- occurs when 2 plates of different densities collide forcing the denser plate back into the mantle forming ocean trenches. The plate is also burned up and produces volcanoes. This usually occurs along coastlines where continental crust meets oceanic crust. 10. Plate movement can alter Ea ...
... *subduction- occurs when 2 plates of different densities collide forcing the denser plate back into the mantle forming ocean trenches. The plate is also burned up and produces volcanoes. This usually occurs along coastlines where continental crust meets oceanic crust. 10. Plate movement can alter Ea ...
Geology of Washington
... forced onto the North American plate around Spokane • These islands are welded on, and end about where Twisp and the Methow valley is today ...
... forced onto the North American plate around Spokane • These islands are welded on, and end about where Twisp and the Methow valley is today ...
Document
... The Theory of Plate Tectonics • The Earth’s is constantly changing • The Earth’s crust is divided into 8 large plates (and several small plates) • Almost all major earthquake or volcano activity occurs along the plate boundaries • Because each plate moves as a unit, the interiors of the plates are ...
... The Theory of Plate Tectonics • The Earth’s is constantly changing • The Earth’s crust is divided into 8 large plates (and several small plates) • Almost all major earthquake or volcano activity occurs along the plate boundaries • Because each plate moves as a unit, the interiors of the plates are ...
A New Theory on the Formation of Hotspot
... Terrain: the ocean floor in the eastern Pacific is dominated by the East Pacific Rise, while the western Pacific is dissected by deep trenches, including the Mariana Trench, which is the world's deepest place Deepest point: Challenger Deep in the Mariana Trench - 11,022m ...
... Terrain: the ocean floor in the eastern Pacific is dominated by the East Pacific Rise, while the western Pacific is dissected by deep trenches, including the Mariana Trench, which is the world's deepest place Deepest point: Challenger Deep in the Mariana Trench - 11,022m ...
The LAB beneath the world oldest oceanic plate
... Universität Wien, Institut für Meteorologie und Geophysik, 1090 Wien, Austria ...
... Universität Wien, Institut für Meteorologie und Geophysik, 1090 Wien, Austria ...
The Ocean Floor DOC
... Trenches form at sites of plate convergence where one moving plate descends beneath another and plunges back into the mantle. • Deep-ocean trenches are long, narrow creases in the ocean floor that form the deepest parts of the ocean. The sediments that make up abyssal plains are carried there by tur ...
... Trenches form at sites of plate convergence where one moving plate descends beneath another and plunges back into the mantle. • Deep-ocean trenches are long, narrow creases in the ocean floor that form the deepest parts of the ocean. The sediments that make up abyssal plains are carried there by tur ...
Introducción a la Geofísica
... 4) Given a typical oceanic crustal thickness of 6 km and 4 km of water depth, estimate the thickness of the continental crust at sea level and beneath the Tibetean Plateau (5 km high). Assume a constant crustal density of 2900 kg/m3 and mantle density of 3200 kg/m3. 5) The Hawaiian Islands in the pa ...
... 4) Given a typical oceanic crustal thickness of 6 km and 4 km of water depth, estimate the thickness of the continental crust at sea level and beneath the Tibetean Plateau (5 km high). Assume a constant crustal density of 2900 kg/m3 and mantle density of 3200 kg/m3. 5) The Hawaiian Islands in the pa ...
Unit Day 1
... Continental crust is relatively thick, old, and less dense. Continental drift is a consequence of plate tectonics. Major features of divergent boundaries include mid-ocean ridges, rift valleys, and fissure volcanoes. When rocks are compressed horizontally, their layers may be deformed into wave-like ...
... Continental crust is relatively thick, old, and less dense. Continental drift is a consequence of plate tectonics. Major features of divergent boundaries include mid-ocean ridges, rift valleys, and fissure volcanoes. When rocks are compressed horizontally, their layers may be deformed into wave-like ...
Chapter 9 Plate Tectonics
... Sonar (SOund NAvigation and Ranging) a system that uses sounds waves to calculate the distance to an object ...
... Sonar (SOund NAvigation and Ranging) a system that uses sounds waves to calculate the distance to an object ...
Volcanoes and Igneous Activity Earth - Chapter 4
... outer layer – Known as the lithosphere – Consists of uppermost mantle and overlying crust – Overlies a weaker region in the mantle called the asthenosphere ...
... outer layer – Known as the lithosphere – Consists of uppermost mantle and overlying crust – Overlies a weaker region in the mantle called the asthenosphere ...
Earth Science Chapter 20: Mountain Building Chapter Overview
... As peaks are eroded, mass decreases, and the roots of the mountains become smaller. A balance between erosion and the decrease on the size of the root will continue for hundreds of millions of years until both the mountains and their roots disappear. This slow process of the crust’s rising as the re ...
... As peaks are eroded, mass decreases, and the roots of the mountains become smaller. A balance between erosion and the decrease on the size of the root will continue for hundreds of millions of years until both the mountains and their roots disappear. This slow process of the crust’s rising as the re ...
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.