Tectonics Quiz Topics
... Evidence of sea floor spreading shows that the ocean plates have moved away from the mid-ocean ridges over time. This has created new oceanic crust and moved the continental plates further apart. Explain how glacial deposits support the theory of plate tectonics. Glacial deposits on different contin ...
... Evidence of sea floor spreading shows that the ocean plates have moved away from the mid-ocean ridges over time. This has created new oceanic crust and moved the continental plates further apart. Explain how glacial deposits support the theory of plate tectonics. Glacial deposits on different contin ...
Questions
... 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 ...
1 One thing that all the diverse forms of life found in the oceans have
... deep water which rises in a process called upwelling. Such upwelling is enhanced near irregularly-shaped coastal features, such as near capes. Deep waters are usually colder than surface waters because they have not been heated by the Sun. They also tend to be richer in the nutrients that support oc ...
... deep water which rises in a process called upwelling. Such upwelling is enhanced near irregularly-shaped coastal features, such as near capes. Deep waters are usually colder than surface waters because they have not been heated by the Sun. They also tend to be richer in the nutrients that support oc ...
Jigsaw Readings
... apart. Geologists can observe this process happening today at many places on Earth. The point where plates have broken apart is called a rift. Rifts occurring in crustal plates under the continents often form long valleys, or rift valleys. These can be many thousands of feet deep. An example of a co ...
... apart. Geologists can observe this process happening today at many places on Earth. The point where plates have broken apart is called a rift. Rifts occurring in crustal plates under the continents often form long valleys, or rift valleys. These can be many thousands of feet deep. An example of a co ...
Geology - Fetlar
... years ago. The assembly of this jigsaw was the result of a massive collision as plate tectonic forces drove three ancient continents and the ocean between them together to form a supercontinent. As a result the vast Caledonian Mountain Chain was thrust up in a process known as the Caledonian Orogeny ...
... years ago. The assembly of this jigsaw was the result of a massive collision as plate tectonic forces drove three ancient continents and the ocean between them together to form a supercontinent. As a result the vast Caledonian Mountain Chain was thrust up in a process known as the Caledonian Orogeny ...
The lithosphere, geodynamics and Archean mineral systems
... Geochemical and geological evidence suggests that subduction processes, critical for the formation of many magmatic and hydrothermal ore deposits, have been active since about 3.9Ga. The emergence of the Sub-Continental Lithospheric Mantle (SCLM) between ca 3.6–3.0 Ga provided the ability to preserv ...
... Geochemical and geological evidence suggests that subduction processes, critical for the formation of many magmatic and hydrothermal ore deposits, have been active since about 3.9Ga. The emergence of the Sub-Continental Lithospheric Mantle (SCLM) between ca 3.6–3.0 Ga provided the ability to preserv ...
Tymms et al Nice abstract
... Recent observations of depth dependent (heterogeneous) stretching where upper crustal extension is much less than that of the lower crust and lithospheric mantle at both non-volcanic and volcanic margins plus the discovery of broad domains of exhumed continental mantle at non-volcanic rifted margins ...
... Recent observations of depth dependent (heterogeneous) stretching where upper crustal extension is much less than that of the lower crust and lithospheric mantle at both non-volcanic and volcanic margins plus the discovery of broad domains of exhumed continental mantle at non-volcanic rifted margins ...
Plate Tectonics
... spreading ridges erupt more than three times as much molten rock as do all the volcanoes on land. Magma rises from Earth’s mantle at spreading ridges and cools on and beneath the ocean floor, adding to the plates on either side. The growing plates inch away from the ridges—widening ocean basins and ...
... spreading ridges erupt more than three times as much molten rock as do all the volcanoes on land. Magma rises from Earth’s mantle at spreading ridges and cools on and beneath the ocean floor, adding to the plates on either side. The growing plates inch away from the ridges—widening ocean basins and ...
Breakthrough the Discontinuity: 21st Century Mohole
... (1) First step is to drill "Pre-Mohole" with current technology; Off-set drilling technique into aged cold lithosphere will be conducted. Meanwhile, technological development and required site survey of the "ultimate" Mohole are carried on. One candidate for this Pre-Mohole would be the fore-arc, tr ...
... (1) First step is to drill "Pre-Mohole" with current technology; Off-set drilling technique into aged cold lithosphere will be conducted. Meanwhile, technological development and required site survey of the "ultimate" Mohole are carried on. One candidate for this Pre-Mohole would be the fore-arc, tr ...
Chapter 20 - "Inside the Earth"
... – Some plates contain part of a continent and part of an ocean basin, while others contain only ocean basins. – Earthquakes, volcanoes, and the most rapid changes in the Earth’s crust occur at these plate boundaries. ...
... – Some plates contain part of a continent and part of an ocean basin, while others contain only ocean basins. – Earthquakes, volcanoes, and the most rapid changes in the Earth’s crust occur at these plate boundaries. ...
plate_tectonics302b
... See the section line (blue line) on the map shown in the third preceding slide. From Yin, A. and T.M. Harrison, 2000, Geologic Evolution of the Himalayan-Tibetan Orogen, Ann. Rev. Earth Planet. Sci., v.28, 211-280. ...
... See the section line (blue line) on the map shown in the third preceding slide. From Yin, A. and T.M. Harrison, 2000, Geologic Evolution of the Himalayan-Tibetan Orogen, Ann. Rev. Earth Planet. Sci., v.28, 211-280. ...
Notes : Motion of the Lithosphere
... dense) material flows away and sinks into the mantle to replace the rising material • As the material moves, it drags the overlying ...
... dense) material flows away and sinks into the mantle to replace the rising material • As the material moves, it drags the overlying ...
Methodology Study area Results Introduction Conclusion Abstract
... control them. The enhanced biogenic flux at SBBT during summer monsoon could be explained with the help of bottom-up control wherein the physical processes controlled chlorophyll biomass through nutrient supply. The mismatch between the lack of seasonality of biogenic flux at EIOT and seasonality in ...
... control them. The enhanced biogenic flux at SBBT during summer monsoon could be explained with the help of bottom-up control wherein the physical processes controlled chlorophyll biomass through nutrient supply. The mismatch between the lack of seasonality of biogenic flux at EIOT and seasonality in ...
Earth Science – Quiz 2
... 18. ________ denotes the exposed, crescent-shaped rupture surface at the head of a slump. A) Scoop B) Sole C) Toe D) Scarp 19. Consider a weathered rock or soil particle lying on a slope. How will the gravitational force pulling the particle downward along the land surface vary with the inclination ...
... 18. ________ denotes the exposed, crescent-shaped rupture surface at the head of a slump. A) Scoop B) Sole C) Toe D) Scarp 19. Consider a weathered rock or soil particle lying on a slope. How will the gravitational force pulling the particle downward along the land surface vary with the inclination ...
Proterozoic Evolution of the Western Margin of the
... Defining the extent and nature of basement provinces that lie beneath Mesoproterozoic to Phanerozoic sedimentary rocks in the region between the exposed western margin of the Archean Wyoming craton and the Neoproterozoic margin of Laurentia has been elusive because of thick cover and voluminous Cret ...
... Defining the extent and nature of basement provinces that lie beneath Mesoproterozoic to Phanerozoic sedimentary rocks in the region between the exposed western margin of the Archean Wyoming craton and the Neoproterozoic margin of Laurentia has been elusive because of thick cover and voluminous Cret ...
Lab #2 – Interpreting Tectonic and Bathymetric Maps
... 2) Using the bathymetric map “Measured and Estimated Seafloor Topography” locate the deep, broad abyssal plains of the Atlantic Ocean. Where are there deeper areas of the Atlantic Ocean? (Hint: Remember the deepest bathymetry is shown by a light purple color, not deep purple or blue.) Name or indica ...
... 2) Using the bathymetric map “Measured and Estimated Seafloor Topography” locate the deep, broad abyssal plains of the Atlantic Ocean. Where are there deeper areas of the Atlantic Ocean? (Hint: Remember the deepest bathymetry is shown by a light purple color, not deep purple or blue.) Name or indica ...
Continental Drift and Sea
... Alfred Wegener (1910) hypothesized that at one time all the continents were once joined together in a single landmass, he named Pangea, and have since drifted apart – now known as continental drift. Wegener gathered the following evidence to support his hypothesis: ...
... Alfred Wegener (1910) hypothesized that at one time all the continents were once joined together in a single landmass, he named Pangea, and have since drifted apart – now known as continental drift. Wegener gathered the following evidence to support his hypothesis: ...
Provincial Exams - Earth Science (Unit 4)-1
... Where on the map does oceanic-continental convergence occur? A. (A) B. (B) C. (C) D. (D) Which of the following would be associated with this type of plate boundary? ...
... Where on the map does oceanic-continental convergence occur? A. (A) B. (B) C. (C) D. (D) Which of the following would be associated with this type of plate boundary? ...
Decades of data on world`s oceans reveal a troubling
... looked at a historic dataset of ocean information stretching back more than 50 years and searched for long term trends and patterns. They found that oxygen levels started dropping in the 1980s as ocean temperatures began to climb. ...
... looked at a historic dataset of ocean information stretching back more than 50 years and searched for long term trends and patterns. They found that oxygen levels started dropping in the 1980s as ocean temperatures began to climb. ...
... Subduction Zones and Volcanoes At some convergent boundaries, an oceanic plate collides with a continental plate. Oceanic crust tends to be denser and thinner than continental crust, so the denser oceanic crust gets bent and pulled under, or subducted, beneath the lighter and thicker continental cru ...
Lab-Isostasy.doc
... top of one of the blocks to simulate thickened continental crust. This might be a bit tricky, but try to pile them as high as you can (see Figure 1 below). Step 6: Measure the thickness of the two piles. Then measure the elevation of the mountains (pile of plates) and the plains (single block) and t ...
... top of one of the blocks to simulate thickened continental crust. This might be a bit tricky, but try to pile them as high as you can (see Figure 1 below). Step 6: Measure the thickness of the two piles. Then measure the elevation of the mountains (pile of plates) and the plains (single block) and t ...
snack_tectonics_lab_lt_2015 Power Point
... 2. Draw what your food looks like after you created the (continental to continental) convergent boundary in the space provided 3. Label drawing as to what each item represents in terms of Earth layers or processes in plate tectonics. Use these words: asthenosphere, continental crust, ...
... 2. Draw what your food looks like after you created the (continental to continental) convergent boundary in the space provided 3. Label drawing as to what each item represents in terms of Earth layers or processes in plate tectonics. Use these words: asthenosphere, continental crust, ...
Changing Earth - Ms. Stinson's Science Class
... one another. When the plates interact, the result of their movement is seen at the plate boundaries , as in the figure above. Movement along any plate boundary means that changes must happen at other boundaries. What is happening to the Atlantic Ocean floor between the North American and African Pla ...
... one another. When the plates interact, the result of their movement is seen at the plate boundaries , as in the figure above. Movement along any plate boundary means that changes must happen at other boundaries. What is happening to the Atlantic Ocean floor between the North American and African Pla ...
Continental Margins 14.2 Ocean Floor Features
... leads to the deep-ocean floor and marks the seaward edge of the continental shelf. • A submarine canyon is the seaward extension of a valley that was cut on the continental shelf during a time when sea level was lower—a canyon carved into the outer continental shelf, slope, and rise by turbidity cur ...
... leads to the deep-ocean floor and marks the seaward edge of the continental shelf. • A submarine canyon is the seaward extension of a valley that was cut on the continental shelf during a time when sea level was lower—a canyon carved into the outer continental shelf, slope, and rise by turbidity cur ...
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.