bokelmannAbstract_5p..
... deeper mantle under North America moves faster than the North American plate, and that it moves in southwestern direction. Interestingly, the fast directions also correlate well with relative plate motion of the North American plate relative to Eurasia which may suggest a larger−scale mechanism rela ...
... deeper mantle under North America moves faster than the North American plate, and that it moves in southwestern direction. Interestingly, the fast directions also correlate well with relative plate motion of the North American plate relative to Eurasia which may suggest a larger−scale mechanism rela ...
Practice Exam #1
... 4. Why must a planet with divergent plate boundaries also have convergent plate boundaries? 5. How does the temperature of a substance affect its volume, density and buoyancy? 6. What is the energy source and driving mechanism for the movement of plates? Describe how this process works. 7. Two ident ...
... 4. Why must a planet with divergent plate boundaries also have convergent plate boundaries? 5. How does the temperature of a substance affect its volume, density and buoyancy? 6. What is the energy source and driving mechanism for the movement of plates? Describe how this process works. 7. Two ident ...
Continental drift and plate tectonics
... lithosphere at plate boundaries. The material cools on the ocean floor, forming a ridge. Some peaks along mid-ocean ridges rise more than 3 kilometres above the ocean floor. Oceanic crust Heavy oceanic crust is formed from mantle material rising through plate boundaries. The oceanic crust spreads aw ...
... lithosphere at plate boundaries. The material cools on the ocean floor, forming a ridge. Some peaks along mid-ocean ridges rise more than 3 kilometres above the ocean floor. Oceanic crust Heavy oceanic crust is formed from mantle material rising through plate boundaries. The oceanic crust spreads aw ...
Plate Tectonics - Holy Angels School
... the continents of North America and Eurasia. • At the same time, Gondwana also broke into two continents. • One continent contained land that is now the continents of South America and Africa. • The other continent contained land that is now Antarctica, Australia, and India. What discoveries support ...
... the continents of North America and Eurasia. • At the same time, Gondwana also broke into two continents. • One continent contained land that is now the continents of South America and Africa. • The other continent contained land that is now Antarctica, Australia, and India. What discoveries support ...
7-3 Outline answers
... 2. The cold, rigid rock layer on the outermost part of Earth is called the lithosphere. It consists of crust and the upper part of the mantle. ...
... 2. The cold, rigid rock layer on the outermost part of Earth is called the lithosphere. It consists of crust and the upper part of the mantle. ...
12.002 Physics and Chemistry of the Earth and Terrestrial Planets
... ridges between plates are known: vAB=50 mm/yr, vBC=47 mm/yr, vCD=42 mm/yr, vAD=43 mm/yr, vDE=28 mm/yr. The tectonic system enters a continent (shading) where the relative rates of motion cannot be measured, although the approximate position of the plate boundary is known and shown by the wide shaded ...
... ridges between plates are known: vAB=50 mm/yr, vBC=47 mm/yr, vCD=42 mm/yr, vAD=43 mm/yr, vDE=28 mm/yr. The tectonic system enters a continent (shading) where the relative rates of motion cannot be measured, although the approximate position of the plate boundary is known and shown by the wide shaded ...
Splash Screen
... • During accretion, continents can grow outward. • If two sea plates converge, an island chain may form. ...
... • During accretion, continents can grow outward. • If two sea plates converge, an island chain may form. ...
Chapter 5: Plate Tectonics
... 1. What technology did scientists use in the mid-1900s to map the mid-ocean ridge? 2. Where are mid-ocean ridges found? 3. What are the three types of evidence for sea-floor spreading? a. Molten Material b. Magnetic Stripes c. Drilling Samples 4. What occurs in sea-floor spreading and where does thi ...
... 1. What technology did scientists use in the mid-1900s to map the mid-ocean ridge? 2. Where are mid-ocean ridges found? 3. What are the three types of evidence for sea-floor spreading? a. Molten Material b. Magnetic Stripes c. Drilling Samples 4. What occurs in sea-floor spreading and where does thi ...
Pre-Test
... surface. The magma that is deeper within Earth is hotter, which means it is less dense. It causes the magma to rise towards the surface. As it gets closer to the surface, the magma cools, increases in density and sinks again causing a convection cycle to occur. This movement causes the tectonic plat ...
... surface. The magma that is deeper within Earth is hotter, which means it is less dense. It causes the magma to rise towards the surface. As it gets closer to the surface, the magma cools, increases in density and sinks again causing a convection cycle to occur. This movement causes the tectonic plat ...
summing-up - Zanichelli online per la scuola
... constant over time, a mechanism must exist that “consumes” the oceanic crust. ...
... constant over time, a mechanism must exist that “consumes” the oceanic crust. ...
Davidson and Yelverton, 2017
... rocks and tectonic plates shifting, cracking, slipping and thrusting is not so convenient for describing action, or causation of action, deep within the mantle. If significant electrical fluctuations can occur at significant depths, a mechanism complementary to those already in existence for deep ea ...
... rocks and tectonic plates shifting, cracking, slipping and thrusting is not so convenient for describing action, or causation of action, deep within the mantle. If significant electrical fluctuations can occur at significant depths, a mechanism complementary to those already in existence for deep ea ...
Construction of Earth
... partial melting of part of the mantle rock. Know that there is a thin layer of sedimentary rock on top in many places. 12.11.83 Understand that geologic time can be estimated by observing rock sequences and using fossils to correlate the sequences at various locations. Understand that current method ...
... partial melting of part of the mantle rock. Know that there is a thin layer of sedimentary rock on top in many places. 12.11.83 Understand that geologic time can be estimated by observing rock sequences and using fossils to correlate the sequences at various locations. Understand that current method ...
Plate Tectonic Theory
... Sea Floor Spreading: The How… • Sea Floor Spreading animation • Remember: convection currents CAUSE sea floor spreading—gravity causes convection currents • Convection Currents and Plate Movement animation • Sea Floor Spreading from BBC documentary film "Earth The Power Of The Planet " ...
... Sea Floor Spreading: The How… • Sea Floor Spreading animation • Remember: convection currents CAUSE sea floor spreading—gravity causes convection currents • Convection Currents and Plate Movement animation • Sea Floor Spreading from BBC documentary film "Earth The Power Of The Planet " ...
Continental drift: An idea before its time Pangaea approximately 200
... Testing plate tectonics: birth of a new theory • Evidence from ocean drilling • Some of the most convincing evidence confirming seafloor spreading has come from drilling directly into ocean-floor sediment – Age of deepest sediments – Thickness of ocean-floor sediments verifies seafloor spreading ...
... Testing plate tectonics: birth of a new theory • Evidence from ocean drilling • Some of the most convincing evidence confirming seafloor spreading has come from drilling directly into ocean-floor sediment – Age of deepest sediments – Thickness of ocean-floor sediments verifies seafloor spreading ...
Portraying the Earth
... congruity of the shapes of the continents across the Atlantic Ocean He also looked at shapes of both South America and Africa and theorized that the shapes of the two continents fit as if they once were one In the late 1960’s this theory was finally accepted when seafloor spreading was discovered ...
... congruity of the shapes of the continents across the Atlantic Ocean He also looked at shapes of both South America and Africa and theorized that the shapes of the two continents fit as if they once were one In the late 1960’s this theory was finally accepted when seafloor spreading was discovered ...
Year 3 Plate Tectonics
... Massive layers of rock got folded by compressional forces as a result and formed a narrow belt along the western edge of the continent. During the last 20 million years, parts of the Andes have been lifted over 1500 m. Massive layers of rock got folded by compressional forces ...
... Massive layers of rock got folded by compressional forces as a result and formed a narrow belt along the western edge of the continent. During the last 20 million years, parts of the Andes have been lifted over 1500 m. Massive layers of rock got folded by compressional forces ...
Theory of PLATE TECTONICS
... Contracting Earth Theory early 20th century • The Earth started out as a molten blob and gradually cooled. • As it cooled, heavier metals (Fe) sank down and formed the core, while lighter metals (Al) stayed up in the crust. • Pressure produced by contraction caused some parts of the crust to ...
... Contracting Earth Theory early 20th century • The Earth started out as a molten blob and gradually cooled. • As it cooled, heavier metals (Fe) sank down and formed the core, while lighter metals (Al) stayed up in the crust. • Pressure produced by contraction caused some parts of the crust to ...
plate tectonics
... Analogy of convection in a pot of soup Estimates of temperature made from analysis of Earthquake waves Exact details unknown because it is difficult to collect data from the mantle ...
... Analogy of convection in a pot of soup Estimates of temperature made from analysis of Earthquake waves Exact details unknown because it is difficult to collect data from the mantle ...
On page of your notebook create the following chart.
... If you look at a map of the world, you may notice that different continents seem to fit together like a giant puzzle. For example, eastern South America seems to fill the space below West Africa. Many scientists believe that several or even all of the present continents of the world once fit togethe ...
... If you look at a map of the world, you may notice that different continents seem to fit together like a giant puzzle. For example, eastern South America seems to fill the space below West Africa. Many scientists believe that several or even all of the present continents of the world once fit togethe ...
reading and synthesizing
... Plate boundaries: locus of seismicity +/- magmatic activities, and high topography. Divergent, convergent, and transform plate boundaries. Lithospheric plates: oceanic lithosphere only, or both oceanic and continental lithosphere, they float on the asthenosphere. ...
... Plate boundaries: locus of seismicity +/- magmatic activities, and high topography. Divergent, convergent, and transform plate boundaries. Lithospheric plates: oceanic lithosphere only, or both oceanic and continental lithosphere, they float on the asthenosphere. ...
Contrasting Extensional Basin Styles and Sedimentary Fill Across
... potential field data image a number of late Mesozoic and Cenozoic basins with at least 7.5 to 10 km of sedimentary fill. In the North Chukchi Basin as much as 20 km of sedimentary fill lies above acoustic basement. The entire shelf is overlain by a post-rift prograding succession. These basins have ...
... potential field data image a number of late Mesozoic and Cenozoic basins with at least 7.5 to 10 km of sedimentary fill. In the North Chukchi Basin as much as 20 km of sedimentary fill lies above acoustic basement. The entire shelf is overlain by a post-rift prograding succession. These basins have ...
Earthquakes and volcanoes
... • This forms a trench on the ocean floor • The worlds deepest parts of the ocean are found along trenches – E.g. The Mariana Trench is 11 km deep! ...
... • This forms a trench on the ocean floor • The worlds deepest parts of the ocean are found along trenches – E.g. The Mariana Trench is 11 km deep! ...
ES Chapter 10 Notes
... - his theory was rejected (not believed) until after his death - he couldn’t explain HOW, WHEN, or WHY the continents moved - his theory was based on the shapes of the continents - the continents fit together like puzzle pieces - his theory needed more evidence from fossils, climate, and rocks to be ...
... - his theory was rejected (not believed) until after his death - he couldn’t explain HOW, WHEN, or WHY the continents moved - his theory was based on the shapes of the continents - the continents fit together like puzzle pieces - his theory needed more evidence from fossils, climate, and rocks to be ...
USGS: The Interior of the Earth
... Our knowledge of the upper mantle, including the tectonic plates, is derived from analyses of earthquake waves (see figure for paths); heat flow, magnetic, and gravity studies; and laboratory experiments on rocks and minerals. Between 100 and 200 kilometers below the Earth's surface, the temperature ...
... Our knowledge of the upper mantle, including the tectonic plates, is derived from analyses of earthquake waves (see figure for paths); heat flow, magnetic, and gravity studies; and laboratory experiments on rocks and minerals. Between 100 and 200 kilometers below the Earth's surface, the temperature ...
Earth Science Pages 190-196
... waves are produced…they travel at different speeds through the Earth. 1.Their speed depends on the density and composition of material that they pass through. 2. A seismic wave traveling through a solid will go faster than a seismic wave traveling through a liquid. ...
... waves are produced…they travel at different speeds through the Earth. 1.Their speed depends on the density and composition of material that they pass through. 2. A seismic wave traveling through a solid will go faster than a seismic wave traveling through a liquid. ...
Post-glacial rebound
Post-glacial rebound (sometimes called continental rebound) is the rise of land masses that were depressed by the huge weight of ice sheets during the last glacial period, through a process known as isostatic depression. Post-glacial rebound and isostatic depression are different parts of a process known as either glacial isostasy, glacial isostatic adjustment, or glacioisostasy. Glacioisostasy is the solid Earth deformation associated with changes in ice mass distribution. The most obvious and direct affects of post-glacial rebound are readily apparent in northern Europe (especially Scotland, Estonia, Latvia, Fennoscandia, and northern Denmark), Siberia, Canada, the Great Lakes of Canada and the United States, the coastal region of the US state of Maine, parts of Patagonia, and Antarctica. However, through processes known as ocean siphoning and continental levering, the effects of post-glacial rebound on sea-level are felt globally far from the locations of current and former ice sheets.