Geobit 10.indd
... These unusual observations have puzzled scientists and non-scientists for years. As long ago as the 1600s, cartographers (map makers) wondered about the similar outlines of South America and Africa. Only in the last few decades have answers to these mysteries been assembled. Together, they give an a ...
... These unusual observations have puzzled scientists and non-scientists for years. As long ago as the 1600s, cartographers (map makers) wondered about the similar outlines of South America and Africa. Only in the last few decades have answers to these mysteries been assembled. Together, they give an a ...
rifted margin
... The Atlantic: “Passive” Ocean Basin The eastern North American continental margin is not a plate boundary. The continent/ocean boundary was created when Pangea rifted apart, creating a transition from continental to oceanic crust through extensional thinning and magmatic emplacement. This type of co ...
... The Atlantic: “Passive” Ocean Basin The eastern North American continental margin is not a plate boundary. The continent/ocean boundary was created when Pangea rifted apart, creating a transition from continental to oceanic crust through extensional thinning and magmatic emplacement. This type of co ...
Slide 1
... spin caused the continents to move, plowing through the oceanic plate and producing mountains on their leading edges. Geologists at that time understood enough about the strength of rocks to know that this was highly unlikely. Wegener's work was largely unaccepted in the northern hemisphere. In the ...
... spin caused the continents to move, plowing through the oceanic plate and producing mountains on their leading edges. Geologists at that time understood enough about the strength of rocks to know that this was highly unlikely. Wegener's work was largely unaccepted in the northern hemisphere. In the ...
The Ocean Floor
... The green colors are the spreading ridges, older crust, that moves away from the ridge as new crust is formed. The blue colors are the oldest regions of the seafloor. They are either next to continents, or are near areas on Earth where seduction is taking place. ...
... The green colors are the spreading ridges, older crust, that moves away from the ridge as new crust is formed. The blue colors are the oldest regions of the seafloor. They are either next to continents, or are near areas on Earth where seduction is taking place. ...
Computer model shows continents sometimes push
... accretion of exotic crust. Here we present threedimensional dynamic models that show how accretionary margins evolve from the initial collision, through a period of plate margin instability, to re-establishment of a stable convergent margin. The models illustrate how significant curvature of the oro ...
... accretion of exotic crust. Here we present threedimensional dynamic models that show how accretionary margins evolve from the initial collision, through a period of plate margin instability, to re-establishment of a stable convergent margin. The models illustrate how significant curvature of the oro ...
Chapter 3 Plate Tectonics Theory & Evolution
... Direct evidence was lacking., . . Paleomagnetism (study of magnetic properties in rocks) ...
... Direct evidence was lacking., . . Paleomagnetism (study of magnetic properties in rocks) ...
a model of sea-floor spreading
... The Earth's magnetic field is thought to arise from the movement of liquid iron in the outer core as the planet rotates. The field behaves as if a permanent magnet were located near the center of the Earth, inclined about 11 degrees from the geographic axis of rotation. Note that magnetic north (as ...
... The Earth's magnetic field is thought to arise from the movement of liquid iron in the outer core as the planet rotates. The field behaves as if a permanent magnet were located near the center of the Earth, inclined about 11 degrees from the geographic axis of rotation. Note that magnetic north (as ...
The Blue Planet
... Nearly 71 percent of Earth’s surface is covered by the global ocean. Oceanography is a science that draws on the methods and knowledge of geology, chemistry, physics, and biology to study all aspects of the world ocean. Geography of the Oceans The world ocean can be divided into four main ocea ...
... Nearly 71 percent of Earth’s surface is covered by the global ocean. Oceanography is a science that draws on the methods and knowledge of geology, chemistry, physics, and biology to study all aspects of the world ocean. Geography of the Oceans The world ocean can be divided into four main ocea ...
Intro to plate tectonics
... published his theory that a single continent existed about 300 million years ago. He named this super continent Pangaea and maintained that it had later split into the two continents of Laurasia in the north and Gondawanaland in the south. Today’s continents were formed from further splitting of the ...
... published his theory that a single continent existed about 300 million years ago. He named this super continent Pangaea and maintained that it had later split into the two continents of Laurasia in the north and Gondawanaland in the south. Today’s continents were formed from further splitting of the ...
Erosion and Plate tectonics part 2
... --Land on Earth is ______________________! Instead, it is several pieces of rock ____________ on an ocean of magma. --Plate Tectonics studies how these rock sections (called _________________) move and ___________________. Continental Drift -- of years ago, Earth was _____________________ called Pan ...
... --Land on Earth is ______________________! Instead, it is several pieces of rock ____________ on an ocean of magma. --Plate Tectonics studies how these rock sections (called _________________) move and ___________________. Continental Drift -- of years ago, Earth was _____________________ called Pan ...
landforms associated with plate boundary activity
... collision margins) • Fold mountains at destructive margins occur where oceanic crust is subducted underneath the continental plate, forcing the overriding plate to crumple and uplift the resulting folding and faulting results in the formation of a mountain chain roughly parallel to the oceanic trenc ...
... collision margins) • Fold mountains at destructive margins occur where oceanic crust is subducted underneath the continental plate, forcing the overriding plate to crumple and uplift the resulting folding and faulting results in the formation of a mountain chain roughly parallel to the oceanic trenc ...
The Ocean Floor DOC
... • Marking the seaward edge of the continental shelf is the continental slope, a steep gradient that leads to the deep-ocean floor. • Deep, steep-sided valleys known as submarine canyons are cut into the continental slope. • Turbidity currents are occasional movements of dense, sediment-rich water do ...
... • Marking the seaward edge of the continental shelf is the continental slope, a steep gradient that leads to the deep-ocean floor. • Deep, steep-sided valleys known as submarine canyons are cut into the continental slope. • Turbidity currents are occasional movements of dense, sediment-rich water do ...
Review of Seafloor Spreading
... Seafloor spreading was the missing link Wegener needed to complete his model of continental drift. ...
... Seafloor spreading was the missing link Wegener needed to complete his model of continental drift. ...
OCEAN FLOOR TOPOGRAPHY
... SONAR, SOUND NAVIGATION AND RANGING, IS A TOOL USED TO MAP THE OCEAN FLOOR. SOUND WAVES TRAVEL FURTHER IN WATER THAN DO LIGHT AND RADAR WAVES. SONAR IS USED TO DEVELOP NAUTICAL CHARTS WHICH SHOW THE CONFIGURATION OF THE SHORELINE, SEA FLOOR, AND WATER DEPTHS. SONAR ALSO PROVIDES LOCATIONS OF DANGERS ...
... SONAR, SOUND NAVIGATION AND RANGING, IS A TOOL USED TO MAP THE OCEAN FLOOR. SOUND WAVES TRAVEL FURTHER IN WATER THAN DO LIGHT AND RADAR WAVES. SONAR IS USED TO DEVELOP NAUTICAL CHARTS WHICH SHOW THE CONFIGURATION OF THE SHORELINE, SEA FLOOR, AND WATER DEPTHS. SONAR ALSO PROVIDES LOCATIONS OF DANGERS ...
Chapter 5 Plate Tectonics: A Scientific Theory Unfolds
... • Older portions of oceanic plates are returned to the mantle in these destructive plate margins • Surface expression of the descending plate is an ocean trench • Also called subduction zones • Average angle of subduction = 45 ...
... • Older portions of oceanic plates are returned to the mantle in these destructive plate margins • Surface expression of the descending plate is an ocean trench • Also called subduction zones • Average angle of subduction = 45 ...
Continental Drift—An Idea Before Its Time
... Its Time • Alfred Wegener (1880–1930) Dedicated scientist. • Continental drift hypothesis: —The world’s continents are in motion and have been drifting apart into different configurations over geologic time. ...
... Its Time • Alfred Wegener (1880–1930) Dedicated scientist. • Continental drift hypothesis: —The world’s continents are in motion and have been drifting apart into different configurations over geologic time. ...
Plate Tectonics and Deformation of the Crust
... these animals moved between continents, but there is no remnants of a land bridge have ever been discovered between South America and Africa. ...
... these animals moved between continents, but there is no remnants of a land bridge have ever been discovered between South America and Africa. ...
Plate Tectonics campus assessment File
... 8. One piece of evidence that supports the Theory of Plate Tectonics is the discovery of what in both South America and Africa? A. The ancient atmosphere in both places was identical B. The rates of weathering and erosion of rock are similar C. Fossil remains of the same land-dwelling animal and pla ...
... 8. One piece of evidence that supports the Theory of Plate Tectonics is the discovery of what in both South America and Africa? A. The ancient atmosphere in both places was identical B. The rates of weathering and erosion of rock are similar C. Fossil remains of the same land-dwelling animal and pla ...
Magnetic strips in ocean-floor rocks
... and deep-ocean trenches might help to explain how ocean floor was formed. • His hypothesis was ‘ in the process of sea-floor spreading, new ocean floor forms along Earth’s mid-ocean ridges, slowly moves outward across ocean basins, and finally sinks back into the mantle beneath deep-ocean trenches.’ ...
... and deep-ocean trenches might help to explain how ocean floor was formed. • His hypothesis was ‘ in the process of sea-floor spreading, new ocean floor forms along Earth’s mid-ocean ridges, slowly moves outward across ocean basins, and finally sinks back into the mantle beneath deep-ocean trenches.’ ...
Modeling the Ocean Floor Lab
... Continental Margin. The Continental Margin is the boundary between the continents and the Ocean; it has a varying slope that stretches from the beach to the Ocean Basin Floor. The Margin is divided into three different areas determined by the slope of their features. The Continental Shelf is flat li ...
... Continental Margin. The Continental Margin is the boundary between the continents and the Ocean; it has a varying slope that stretches from the beach to the Ocean Basin Floor. The Margin is divided into three different areas determined by the slope of their features. The Continental Shelf is flat li ...
c. How do distinctive rock strata support the Theory of
... that parts of the Earth's crust slowly drift atop a liquid core b. What is the name of the scientist that proposed the Theory of Continental Drift? Alfred Wegener c. What was Pangaea? a gigantic supercontinent d. What are the names of the two continents that Pangaea separated into? Laurasia and Gond ...
... that parts of the Earth's crust slowly drift atop a liquid core b. What is the name of the scientist that proposed the Theory of Continental Drift? Alfred Wegener c. What was Pangaea? a gigantic supercontinent d. What are the names of the two continents that Pangaea separated into? Laurasia and Gond ...
Sea Floor Mapping Lesson Plan Part 2
... Lithospheric plates on the scales of continents and oceans constantly move at rates of centimeters per year in response to movements in the mantle. Major geological events, such as earthquakes, volcanic eruptions, and mountain building, result from these plate motions. ...
... Lithospheric plates on the scales of continents and oceans constantly move at rates of centimeters per year in response to movements in the mantle. Major geological events, such as earthquakes, volcanic eruptions, and mountain building, result from these plate motions. ...
Slow and Steady
... of them. As they spread out, these plates carried the continents to the place we find them today. Take a look at South America and Africa. Don’t they look like two puzzle pieces that used to fit together? The theory of Pangaea also suggests that present day Washington, D.C., Spain, and the Sahara De ...
... of them. As they spread out, these plates carried the continents to the place we find them today. Take a look at South America and Africa. Don’t they look like two puzzle pieces that used to fit together? The theory of Pangaea also suggests that present day Washington, D.C., Spain, and the Sahara De ...
Poor Wegener - Issaquah Connect
... with sonar. They mapped out the shape of the ocean floor and found a big surprise. This surprise and other evidence was the basis for the Theory of Seafloor Spreading proposed by Hess in 1960. The Theory of Seafloor Spreading gave a great deal of credibility to Wegener’s Theory of Continental Drift. ...
... with sonar. They mapped out the shape of the ocean floor and found a big surprise. This surprise and other evidence was the basis for the Theory of Seafloor Spreading proposed by Hess in 1960. The Theory of Seafloor Spreading gave a great deal of credibility to Wegener’s Theory of Continental Drift. ...
Exam 1
... -know the difference between oceanic crust & continental crust -know how pressure and temperature change as you move through the layers of the earth and their effects on the behavior of rocks -know the internal source of heat inside the earth and how heat moves by conduction or convection -know how ...
... -know the difference between oceanic crust & continental crust -know how pressure and temperature change as you move through the layers of the earth and their effects on the behavior of rocks -know the internal source of heat inside the earth and how heat moves by conduction or convection -know how ...
Pangaea
Pangaea or Pangea (/pænˈdʒiːə/) was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 300 million years ago, and it began to break apart about 175 million years ago. In contrast to the present Earth and its distribution of continental mass, much of Pangaea was in the southern hemisphere and surrounded by a super ocean, Panthalassa. Pangaea was the last supercontinent to have existed and the first to be reconstructed by geologists.