Earth Science – Quiz 2
... B) two converging oceanic plates meeting head-on and piling up into a mid-ocean ridge C) a divergent boundary where the continental plate changes to an oceanic plate D) a deep, vertical fault along which two plates slide past one another in opposite directions 56. Which one of the following is an im ...
... B) two converging oceanic plates meeting head-on and piling up into a mid-ocean ridge C) a divergent boundary where the continental plate changes to an oceanic plate D) a deep, vertical fault along which two plates slide past one another in opposite directions 56. Which one of the following is an im ...
A Brief Introduction to the Earth`s Surface
... assume that the crust and mantle are isostatically compensated at a depth of 100 km – in other words, that the lithostatic stress is the same beneath the continents and oceans at this depth. Now suppose that we know (from refraction of seismic waves) that the average thickness of oceanic crust is 20 ...
... assume that the crust and mantle are isostatically compensated at a depth of 100 km – in other words, that the lithostatic stress is the same beneath the continents and oceans at this depth. Now suppose that we know (from refraction of seismic waves) that the average thickness of oceanic crust is 20 ...
Document
... Active plate tectonics and resulting changes in crustal architecture profoundly influence global climate, oceanic circulation, and the origin, distribution and sustainability of life. A key element of the 50-year-old theory of plate tectonics is the distinction between passive and active continental ...
... Active plate tectonics and resulting changes in crustal architecture profoundly influence global climate, oceanic circulation, and the origin, distribution and sustainability of life. A key element of the 50-year-old theory of plate tectonics is the distinction between passive and active continental ...
File - Ian Whaley Dillman EES
... Subduction Zones and Volcanoes At some convergent boundaries, an oceanic plate collides with a continental plate. Oceanic crust tends to be __Thinner___ and __denser__ than continental crust, so the denser oceanic crust gets bent and pulled under, or ___subducted___, beneath the lighter and thicker ...
... Subduction Zones and Volcanoes At some convergent boundaries, an oceanic plate collides with a continental plate. Oceanic crust tends to be __Thinner___ and __denser__ than continental crust, so the denser oceanic crust gets bent and pulled under, or ___subducted___, beneath the lighter and thicker ...
A Model of Earth`s Interior
... The studies of seismic waves indicate that the Earth is composed of many layers. The crust is the outermost part of the Earth below the atmosphere or hydrosphere. This layer is mostly solid rock, but includes soil and eroded/weathered rock. ~ The crust is divided into two major divisions: continenta ...
... The studies of seismic waves indicate that the Earth is composed of many layers. The crust is the outermost part of the Earth below the atmosphere or hydrosphere. This layer is mostly solid rock, but includes soil and eroded/weathered rock. ~ The crust is divided into two major divisions: continenta ...
plate tectonic theory
... In addition to geologic evidence, Wegener found fossil evidence that the continents may have once been connected. Fossils of a freshwater reptile called mesosaurus were found on both the eastern coast of South America and the western coast of South Africa. It is highly unlikely these freshwater anim ...
... In addition to geologic evidence, Wegener found fossil evidence that the continents may have once been connected. Fossils of a freshwater reptile called mesosaurus were found on both the eastern coast of South America and the western coast of South Africa. It is highly unlikely these freshwater anim ...
Chapter405.ppt
... • This happens when the sea floor that lies between them is subducted, and the ocean becomes narrower and narrower until it is all gone and the continents, which as we’ve learned cannot subduct, collide with each other. • One continent may slide a short distance beneath another, but it will not go d ...
... • This happens when the sea floor that lies between them is subducted, and the ocean becomes narrower and narrower until it is all gone and the continents, which as we’ve learned cannot subduct, collide with each other. • One continent may slide a short distance beneath another, but it will not go d ...
Word file - FSU GK-12 Contact Information
... 2. How can rocks be moving like butter in the mantle? They are molten because they are under extreme heat and pressure. 3. What would happen to those mantle rocks if they made it to the much cooler surface of the earth? They would harden and crystallize to form the rocks we are familiar with. 4. So ...
... 2. How can rocks be moving like butter in the mantle? They are molten because they are under extreme heat and pressure. 3. What would happen to those mantle rocks if they made it to the much cooler surface of the earth? They would harden and crystallize to form the rocks we are familiar with. 4. So ...
Invitation and - FSU GK-12 Contact Information
... 2. How can rocks be moving like butter in the mantle? They are molten because they are under extreme heat and pressure. 3. What would happen to those mantle rocks if they made it to the much cooler surface of the earth? They would harden and crystallize to form the rocks we are familiar with. 4. So ...
... 2. How can rocks be moving like butter in the mantle? They are molten because they are under extreme heat and pressure. 3. What would happen to those mantle rocks if they made it to the much cooler surface of the earth? They would harden and crystallize to form the rocks we are familiar with. 4. So ...
southern alps: geology - Geoscience Research Institute
... from the collision of two continents (Europe to the North and Adria, a “promontory” of the African continent, to the South) which were previously separated by a narrow ocean (Fig. 1). The formation of the Alps can be divided in four stages (Fig. 2). 1) Jurassic to Cretaceous: phase of ocean spreadi ...
... from the collision of two continents (Europe to the North and Adria, a “promontory” of the African continent, to the South) which were previously separated by a narrow ocean (Fig. 1). The formation of the Alps can be divided in four stages (Fig. 2). 1) Jurassic to Cretaceous: phase of ocean spreadi ...
Ch. 21 - Tri-City
... ¡ Narrow valley that forms where plates separate Most studied is Mid-Atlantic Ridge ¡ Most of this ridge is under water ¡ A portion of it is at sea level in Iceland ¡ Run roughly down center of Atlantic Ocean, from Arctic Ocean to southern tip of South America ...
... ¡ Narrow valley that forms where plates separate Most studied is Mid-Atlantic Ridge ¡ Most of this ridge is under water ¡ A portion of it is at sea level in Iceland ¡ Run roughly down center of Atlantic Ocean, from Arctic Ocean to southern tip of South America ...
Expedition Worksheet
... appeared that the oceanic lithosphere should be older with greater distance from the center of the mid-ocean ridge where it first formed By matching the reversal history to the magnetic patterns under the sea, and assuming seafloor spreading, the age of a particular piece of oceanic lithosphere coul ...
... appeared that the oceanic lithosphere should be older with greater distance from the center of the mid-ocean ridge where it first formed By matching the reversal history to the magnetic patterns under the sea, and assuming seafloor spreading, the age of a particular piece of oceanic lithosphere coul ...
subduction zones
... activity is associated with all active subduction zones We see dormant and “fossil” volcanoes at places where subduction used to occur This type of volcanic activity is fundamentally different than volcanoes at mid-ocean ridges and hot-spots ...
... activity is associated with all active subduction zones We see dormant and “fossil” volcanoes at places where subduction used to occur This type of volcanic activity is fundamentally different than volcanoes at mid-ocean ridges and hot-spots ...
Mantle
... Earth is composed of concentric spherical layers, with the least dense layer on the outside and the most dense as the core. The lithosphere, the outermost solid shell that includes the crust, floats on the hot, deformable asthenosphere. The mantle is the largest of the layers. Large regions of Earth ...
... Earth is composed of concentric spherical layers, with the least dense layer on the outside and the most dense as the core. The lithosphere, the outermost solid shell that includes the crust, floats on the hot, deformable asthenosphere. The mantle is the largest of the layers. Large regions of Earth ...
subduction zones
... activity is associated with all active subduction zones We see dormant and “fossil” volcanoes at places where subduction used to occur This type of volcanic activity is fundamentally different than volcanoes at mid-ocean ridges and hot-spots ...
... activity is associated with all active subduction zones We see dormant and “fossil” volcanoes at places where subduction used to occur This type of volcanic activity is fundamentally different than volcanoes at mid-ocean ridges and hot-spots ...
Global Variations of Chemical Composition of Oceans
... salinity of the surface waters is markedly higher than that of the deep waters (34.734.9‰). This phenomenon causes formation of highly salt and cold intermediate, deep, and bottom North Atlantic water masses in the subarctic areas in winter. Influence of deep and bottom North Atlantic waters is noti ...
... salinity of the surface waters is markedly higher than that of the deep waters (34.734.9‰). This phenomenon causes formation of highly salt and cold intermediate, deep, and bottom North Atlantic water masses in the subarctic areas in winter. Influence of deep and bottom North Atlantic waters is noti ...
File
... a density of 2.3 g/cm 3. The differences in these densities dictate what will happen when two different plates meet. i. ...
... a density of 2.3 g/cm 3. The differences in these densities dictate what will happen when two different plates meet. i. ...
Reply to reviewer ESDD-1-C149-2011 comments on “Assessing
... instantaneous extinction of life. We are very grateful for the suggestion of additional contributions and have included them in the manuscript. Following Schwartman & Volk (1989), it is important to note that if the geological carbon cycle were to relax to a steady state, then weathering of CO2 woul ...
... instantaneous extinction of life. We are very grateful for the suggestion of additional contributions and have included them in the manuscript. Following Schwartman & Volk (1989), it is important to note that if the geological carbon cycle were to relax to a steady state, then weathering of CO2 woul ...
How can subduction zones give rise to the following
... off to form an accretionary wedge in the fore-arc. However, dredging and drilling in the Mariana forearc and trench has shown that there is little on no sediment in the Mariana trench. Yet during the 40 my since the arc system has been in existence, up to 40 km³ of sedimen / km length of arc should ...
... off to form an accretionary wedge in the fore-arc. However, dredging and drilling in the Mariana forearc and trench has shown that there is little on no sediment in the Mariana trench. Yet during the 40 my since the arc system has been in existence, up to 40 km³ of sedimen / km length of arc should ...
File
... Subduction Zones and Volcanoes At some convergent boundaries, an oceanic plate collides with a continental plate. Oceanic crust tends to be ___thinner____ and _____denser________ than continental crust, so the denser oceanic crust gets bent and pulled under, or _____sunducts______, beneath the light ...
... Subduction Zones and Volcanoes At some convergent boundaries, an oceanic plate collides with a continental plate. Oceanic crust tends to be ___thinner____ and _____denser________ than continental crust, so the denser oceanic crust gets bent and pulled under, or _____sunducts______, beneath the light ...
Part 1: The Factors of Life!
... We know that the visible light translates into heat. There are three temperature zones in ocean water. The surface layer, or mixed layer, is the warmest as it is most affected by the surrounding air and sunlight, as well as wind and rain. The shallow coastal surface waters in the tropics can reach 1 ...
... We know that the visible light translates into heat. There are three temperature zones in ocean water. The surface layer, or mixed layer, is the warmest as it is most affected by the surrounding air and sunlight, as well as wind and rain. The shallow coastal surface waters in the tropics can reach 1 ...
Slide 1 - Duplin County Schools
... http://geography.howstuffworks.com/south-america/the-andes.htm http://www.dailygalaxy.com/my_weblog/2012/03/james-cameron-avatar-directorexplores-mariana-trench-deepest-spot-of-the-planet.html http://en.wikipedia.org/wiki/Mariana_Trench http://gozips.uakron.edu/~jre10/dreamweaver/physical.html http: ...
... http://geography.howstuffworks.com/south-america/the-andes.htm http://www.dailygalaxy.com/my_weblog/2012/03/james-cameron-avatar-directorexplores-mariana-trench-deepest-spot-of-the-planet.html http://en.wikipedia.org/wiki/Mariana_Trench http://gozips.uakron.edu/~jre10/dreamweaver/physical.html http: ...
Ocean - Cal State LA - Instructional Web Server
... Sites where moving lithospheric plates plunge into the mantle Associated with volcanic activity ...
... Sites where moving lithospheric plates plunge into the mantle Associated with volcanic activity ...
Vertical distribution of Groundwater
... Water in the zone of saturation exerts pressure greater than the overlying atmospheric pressure. This pressure makes water flow into a well, when it is dug into the zone of saturation. The well penetrates the zone of aeration also, but its lower than atmospheric pressure implies that water from the ...
... Water in the zone of saturation exerts pressure greater than the overlying atmospheric pressure. This pressure makes water flow into a well, when it is dug into the zone of saturation. The well penetrates the zone of aeration also, but its lower than atmospheric pressure implies that water from the ...
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.