- Catalyst
... The East African rift zone represents a continental rift. The topography of East Africa is highest in Africa because of heating the base of the continent by upwelling basaltic magma. The Red Sea is an incipient ocean basin. Note the dark basalt flows seen along the margins of the Red Sea in the abov ...
... The East African rift zone represents a continental rift. The topography of East Africa is highest in Africa because of heating the base of the continent by upwelling basaltic magma. The Red Sea is an incipient ocean basin. Note the dark basalt flows seen along the margins of the Red Sea in the abov ...
Section 1.1 Outline
... enormous pressure; remains a solid Outer core: layer of liquid metals that surrounds inner core; remains a liquid due to lower pressure Mantle: thickest layer (2900 km or 1700 mi); hot rock that is less dense than core; top part is cool & rigid; below that is hot, thick paste ...
... enormous pressure; remains a solid Outer core: layer of liquid metals that surrounds inner core; remains a liquid due to lower pressure Mantle: thickest layer (2900 km or 1700 mi); hot rock that is less dense than core; top part is cool & rigid; below that is hot, thick paste ...
chapter 8 - Team Strength
... b. They temporarily change the volume of material by compression and expansion. c. They shake particles at right angles to the direction the waves travel. ...
... b. They temporarily change the volume of material by compression and expansion. c. They shake particles at right angles to the direction the waves travel. ...
HERE
... material mostly found at the bottom of oceans called Oceanic Crust (basalt) • and a less dense material which we call the Continental Crust (granite). But since there is ‘more’ continental crust, it actually has more weight over the mantle. Hopefully the next diagrams will help! ...
... material mostly found at the bottom of oceans called Oceanic Crust (basalt) • and a less dense material which we call the Continental Crust (granite). But since there is ‘more’ continental crust, it actually has more weight over the mantle. Hopefully the next diagrams will help! ...
Plate Tectonics 1
... Curious coincidences in the paleomagnetic patterns The temperature of the crust recording the magnetic stripes must be cold enough (which precludes Venus’ surface temperature) and the stripes must be locked within the upper 2 km (too thick and signature superimposition occurs). The depth to the ...
... Curious coincidences in the paleomagnetic patterns The temperature of the crust recording the magnetic stripes must be cold enough (which precludes Venus’ surface temperature) and the stripes must be locked within the upper 2 km (too thick and signature superimposition occurs). The depth to the ...
Quiz 1 Rocks and Plates
... 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 Mount St. Helens and the other Cascad ...
... 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 Mount St. Helens and the other Cascad ...
Dynamic Crust 4 Plate Tectonics
... Widely accepted theory for plate movement in scientific community. Earth’s ...
... Widely accepted theory for plate movement in scientific community. Earth’s ...
Plate Boundaries, evidence to support Plate Tectonics, Mechanisms
... 2) increase in lithosphere thickness because cooling strengthens underlying mantle ...
... 2) increase in lithosphere thickness because cooling strengthens underlying mantle ...
Plate Tectonics campus assessment File
... B. The more dense oceanic crust subducts in the ocean and causes deep ocean trenches to form. C. The less dense oceanic crust subducts under the continental crust to create a trench. D. Due to subduction all around the Pacific Ocean the pacific ring of fire, a line of volcanism, exists. ...
... B. The more dense oceanic crust subducts in the ocean and causes deep ocean trenches to form. C. The less dense oceanic crust subducts under the continental crust to create a trench. D. Due to subduction all around the Pacific Ocean the pacific ring of fire, a line of volcanism, exists. ...
GUADALUPE ISLAND -- For the flrst tlme in hlstory, man hag drÍlling
... practÍ.cabllity of drilting into the deep ocean floor to-a greaten depth than nan has ever gone before. Years may be r_equl.reat !o evãLuate fully the significance of thi.s achievement but we already have spectacular evid.ence that science now has a remarkable new means for dÍscovery. nFor the first ...
... practÍ.cabllity of drilting into the deep ocean floor to-a greaten depth than nan has ever gone before. Years may be r_equl.reat !o evãLuate fully the significance of thi.s achievement but we already have spectacular evid.ence that science now has a remarkable new means for dÍscovery. nFor the first ...
Unit 5 – Structure of the Earth
... Fossils of same species on all continents Same rock formations across continents Ancient glaciers were in the tropics ...
... Fossils of same species on all continents Same rock formations across continents Ancient glaciers were in the tropics ...
Lesson 1
... This motion creates a crack in the ocean floor called a rift, allowing hot magma to move upward through the rift and cool to form new rock. The large, flat, almost level area of the deep- ocean basin is called the abyssal plain. This area is covered with layers of fine sediment. ...
... This motion creates a crack in the ocean floor called a rift, allowing hot magma to move upward through the rift and cool to form new rock. The large, flat, almost level area of the deep- ocean basin is called the abyssal plain. This area is covered with layers of fine sediment. ...
Plate Tectonics Diagram Questions
... earthquakes occur along the Ring of Fire. Describe the boundary interactions that occur in this region and why the occurrence of earthquakes is so high. _There are convergent boundaries all around the Pacific Ocean where subduction zones occur. When the plates move there are earthquakes.___ ...
... earthquakes occur along the Ring of Fire. Describe the boundary interactions that occur in this region and why the occurrence of earthquakes is so high. _There are convergent boundaries all around the Pacific Ocean where subduction zones occur. When the plates move there are earthquakes.___ ...
Continental Drift - sciencewithskinner
... • Paleomagnetism of the ocean floor (1960’s) – Magma cools and iron-bearing ...
... • Paleomagnetism of the ocean floor (1960’s) – Magma cools and iron-bearing ...
Practice 1 - WordPress.com
... 14contacts where plates slide past each other. New oceanic crust is formed along one or 15more margins of each plate by material issuing from deeper layers of the Earth's crust, 16for example, by volcanic eruptions of lava at midocean ridges. If at such a spreading 17contact the two plates support c ...
... 14contacts where plates slide past each other. New oceanic crust is formed along one or 15more margins of each plate by material issuing from deeper layers of the Earth's crust, 16for example, by volcanic eruptions of lava at midocean ridges. If at such a spreading 17contact the two plates support c ...
Nascent continental crust in oceanic island arcs: insights from the
... Nascent continental crust in oceanic island arcs: insights from the Virgin Islands batholith, British Virgin Islands Kevin L. Schrecengost, Allen F. Glazner, and Drew S. Coleman University of North Carolina at Chapel Hill, North Carolina, USA Mid-crustal exposures of oceanic island arcs have been fo ...
... Nascent continental crust in oceanic island arcs: insights from the Virgin Islands batholith, British Virgin Islands Kevin L. Schrecengost, Allen F. Glazner, and Drew S. Coleman University of North Carolina at Chapel Hill, North Carolina, USA Mid-crustal exposures of oceanic island arcs have been fo ...
Section Quiz - TheVirtualNeal
... magnetized minerals that align with Earth’s magnetic field. When the Earth’s magnetic field reverses, the magnetized minerals align in the opposite direction. The record of magnetic reversals is carried away from each side of the spreading center of a midocean ridge, showing that the molten rock is ...
... magnetized minerals that align with Earth’s magnetic field. When the Earth’s magnetic field reverses, the magnetized minerals align in the opposite direction. The record of magnetic reversals is carried away from each side of the spreading center of a midocean ridge, showing that the molten rock is ...
Plate Tectonics Continental Drift Around 1912, a German scientist
... 3. Paleomagnetism is the study of the ancient magnetic fields of the earth. Magnetized minerals preserve a record of the direction of the magnetic pole and their distance from it at the time of their formation. Paleomagnetic data revived interest in continental drift by demonstrating polar wandering ...
... 3. Paleomagnetism is the study of the ancient magnetic fields of the earth. Magnetized minerals preserve a record of the direction of the magnetic pole and their distance from it at the time of their formation. Paleomagnetic data revived interest in continental drift by demonstrating polar wandering ...
Plate Boundaries
... Holding notebook sideways, write the title “Plate Boundaries” across the top of the half-page. Across the bottom of the half-page, separate into three even parts and label each one “convergent,” “divergent,” and “transform.” On the back of that half, label at the top “Definition of _____” and label ...
... Holding notebook sideways, write the title “Plate Boundaries” across the top of the half-page. Across the bottom of the half-page, separate into three even parts and label each one “convergent,” “divergent,” and “transform.” On the back of that half, label at the top “Definition of _____” and label ...
Divergent Plate Boundaries
... Magma rises, cools and forms new lithosphere Typically expressed as mid-oceanic ridges ...
... Magma rises, cools and forms new lithosphere Typically expressed as mid-oceanic ridges ...
Plate Tectonics 2 ppt
... Sketch the geometry of the plates in the subsurface, using figures in the textbook as a guide to the geometries of the plates and thickness of the lithosphere, oceanic crust, and continental crust ...
... Sketch the geometry of the plates in the subsurface, using figures in the textbook as a guide to the geometries of the plates and thickness of the lithosphere, oceanic crust, and continental crust ...
Sediment Deposition Supports Seafloor Spreading
... 3. The images are generally current to within the past three years. The Google Earth view of the ocean is digitally created so you can see the “look of the seafloor” without water. Of course, a real satellite picture of the ocean would show water. Student Activity You may choose to put students in ...
... 3. The images are generally current to within the past three years. The Google Earth view of the ocean is digitally created so you can see the “look of the seafloor” without water. Of course, a real satellite picture of the ocean would show water. Student Activity You may choose to put students in ...
Evidence of Continental Drift
... earthquakes and ocean trenches. • The absence of deep-focus earthquakes along the oceanic ridge system was shown to be consistent with the new theory. ...
... earthquakes and ocean trenches. • The absence of deep-focus earthquakes along the oceanic ridge system was shown to be consistent with the new theory. ...
FREE Sample Here
... 9. If the coastlines across the Atlantic Ocean are spreading apart, why isn’t the Atlantic Ocean deepest in its center? ANSWER: New ocean floor wells up and forms under the Mid-Atlantic Ridge. 10. What evidence confirmed seafloor spreading? ANSWER: Reversals of the Earth’s magnetic field are preserv ...
... 9. If the coastlines across the Atlantic Ocean are spreading apart, why isn’t the Atlantic Ocean deepest in its center? ANSWER: New ocean floor wells up and forms under the Mid-Atlantic Ridge. 10. What evidence confirmed seafloor spreading? ANSWER: Reversals of the Earth’s magnetic field are preserv ...
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.