GEOL1010 Sample Hour Exam 3
... a) oceanic crust contains more water that continental crust. b) oceanic crust contains less water that continental crust. c) oceanic crust is younger than continental crust. d) oceanic crust is thinner than continental crust. e) oceanic crust becomes much denser than continental crust on subduction. ...
... a) oceanic crust contains more water that continental crust. b) oceanic crust contains less water that continental crust. c) oceanic crust is younger than continental crust. d) oceanic crust is thinner than continental crust. e) oceanic crust becomes much denser than continental crust on subduction. ...
The Plate Tectonics Theory
... When plates diverge _________________________, they create __________________________________. Mid-ocean ridges are areas where __________________________________ forms. Creating new oceanic crust is called ____________________________________. When plates diverge _______________, the plates spread ...
... When plates diverge _________________________, they create __________________________________. Mid-ocean ridges are areas where __________________________________ forms. Creating new oceanic crust is called ____________________________________. When plates diverge _______________, the plates spread ...
Lecture 3 - Introduction to Plate Tectonics
... • Green to blue shows lower elevation • Latitude 9° north ...
... • Green to blue shows lower elevation • Latitude 9° north ...
Lecture 3 - Introduction to Plate Tectonics
... • Green to blue shows lower elevation • Latitude 9° north ...
... • Green to blue shows lower elevation • Latitude 9° north ...
2013年1月12日托福写作真题回忆
... On the other hand, the theory is implausible because convection does not normally occur along lines, and it certainly does not occur along lines broken by frequent offsets (an abrupt bend in an object by which one part is turned aside out of line) or changes in direction, as the ridge is. Also it is ...
... On the other hand, the theory is implausible because convection does not normally occur along lines, and it certainly does not occur along lines broken by frequent offsets (an abrupt bend in an object by which one part is turned aside out of line) or changes in direction, as the ridge is. Also it is ...
Introduction to Plate Tectonics - FAU
... • Green to blue shows lower elevation • Latitude 9° north ...
... • Green to blue shows lower elevation • Latitude 9° north ...
deep-ocean basin - MrPetersenScience
... Abyssal plains cover about half of the deep-ocean basins and are the flattest regions on Earth. Layers of fine sediment cover the abyssal plains. ...
... Abyssal plains cover about half of the deep-ocean basins and are the flattest regions on Earth. Layers of fine sediment cover the abyssal plains. ...
Tectonic Plates Quiz
... a) The oceanic and continental crust only. b) The crust and a layer in the outermost part of the mantle. c) The crust and the asthenosphere. d) The crust and the whole mantle. e) A discrete layer in the mantle immediately below the crust. 3. Volcanoes and earthquakes are found along… a) all of the e ...
... a) The oceanic and continental crust only. b) The crust and a layer in the outermost part of the mantle. c) The crust and the asthenosphere. d) The crust and the whole mantle. e) A discrete layer in the mantle immediately below the crust. 3. Volcanoes and earthquakes are found along… a) all of the e ...
Lecture 11A / The Ocean Floor
... Flattest places on Earth (deep-sea sediment covers & subdues topography) ...
... Flattest places on Earth (deep-sea sediment covers & subdues topography) ...
Plate Tectonics - domenicoscience
... forced underneath. This creates a deep trench and a volcanic mountain range. • Examples are the Cascades and the Andes. ...
... forced underneath. This creates a deep trench and a volcanic mountain range. • Examples are the Cascades and the Andes. ...
plate tectonics post-test
... 3. Fossils of the same animals and plants found on different continents 4. Similar types of rocks found on different continents 5. Evidence of the same climatic conditions on different continents ...
... 3. Fossils of the same animals and plants found on different continents 4. Similar types of rocks found on different continents 5. Evidence of the same climatic conditions on different continents ...
plate driving force
... PLATE MOTIONS CAUSE EARTHQUAKES, VOLCANOS, MOUNTAIN BUILDING AT PLATE BOUNDARIES PLATE TECTONICS MAKES EARTH WHAT IT IS - DIFFERENT FROM ...
... PLATE MOTIONS CAUSE EARTHQUAKES, VOLCANOS, MOUNTAIN BUILDING AT PLATE BOUNDARIES PLATE TECTONICS MAKES EARTH WHAT IT IS - DIFFERENT FROM ...
No Slide Title
... time required for their passage, has told researchers much about conditions inside 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, ...
... time required for their passage, has told researchers much about conditions inside 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, ...
Chapter 03
... time required for their passage, has told researchers much about conditions inside 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, ...
... time required for their passage, has told researchers much about conditions inside 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, ...
EGU2016-8321 - CO Meeting Organizer
... in the world due to intensive, strong seismicity and volcanism. We review global geophysical data in order to illustrate the effects of the plate tectonic processes at convergent margins on the crustal and upper mantle structure, seismicity, and geometry of subducting slab. We present global maps of ...
... in the world due to intensive, strong seismicity and volcanism. We review global geophysical data in order to illustrate the effects of the plate tectonic processes at convergent margins on the crustal and upper mantle structure, seismicity, and geometry of subducting slab. We present global maps of ...
PRACTICE Test: Earth Science INSTRUCTIONS - Ms
... c. The number of electrons d. The number of protons and neutrons 18. Which of the following choices represents an isotope? a. H2 ...
... c. The number of electrons d. The number of protons and neutrons 18. Which of the following choices represents an isotope? a. H2 ...
Chapter 7 Study Guide TEST ON LESSON 1 Use your textbook
... together. 2. He discovered evidence that the same plant and animal fossils were found along the coasts of these continents, although they were now separated by vast oceans. 3. He noticed geological formations like mountain ranges, on the two continents also matched up. ...
... together. 2. He discovered evidence that the same plant and animal fossils were found along the coasts of these continents, although they were now separated by vast oceans. 3. He noticed geological formations like mountain ranges, on the two continents also matched up. ...
here - GeoCoops
... fluids sweated out percolate upward, helping to locally melt the overlying solid mantle above the subducting plate to form pockets of liquid rock (magma). 13. The newly generated molten mantle (magma) is less dense than the surrounding rock, so it rises toward the surface. Most of the magma cools an ...
... fluids sweated out percolate upward, helping to locally melt the overlying solid mantle above the subducting plate to form pockets of liquid rock (magma). 13. The newly generated molten mantle (magma) is less dense than the surrounding rock, so it rises toward the surface. Most of the magma cools an ...
Mechanisms of Plate Motion
... Mantle Plumes – hot plumes of rock that are attributed to the upward flowing arms of mantle convection Mantle plumes sometimes show themselves on the surface as hot spots and volcanoes Whole-mantle convection is when slabs of cold oceanic lithosphere descend into the lower mantle, at the same time, ...
... Mantle Plumes – hot plumes of rock that are attributed to the upward flowing arms of mantle convection Mantle plumes sometimes show themselves on the surface as hot spots and volcanoes Whole-mantle convection is when slabs of cold oceanic lithosphere descend into the lower mantle, at the same time, ...
1-2 Notes: Continental Drift Continents Join Together and Split Apart
... Because of this, people disregarded his idea at first. The theory of plate ___________________ built on Wegener’s ideas but also explained HOW plates and their continents move. Evidence from the Sea Floor When ______________________ technology was invented, scientists began mapping the dips an ...
... Because of this, people disregarded his idea at first. The theory of plate ___________________ built on Wegener’s ideas but also explained HOW plates and their continents move. Evidence from the Sea Floor When ______________________ technology was invented, scientists began mapping the dips an ...
The Oldest Crust in Ocean Basins
... Scientists have been studying this area, in water depths of more than 6000m, through ocean drilling for more than three decades. The most recent penetration of the approximately 170 million-yearold crust by ODP occurred on Leg 185 as part of the "Subduction Factory Experiment". ...
... Scientists have been studying this area, in water depths of more than 6000m, through ocean drilling for more than three decades. The most recent penetration of the approximately 170 million-yearold crust by ODP occurred on Leg 185 as part of the "Subduction Factory Experiment". ...
Key topics today: How do we know about the Earth`s interior structure?
... Orientation indicates both field direction and latitude ...
... Orientation indicates both field direction and latitude ...
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.