plate_tectonics
... a) Which type of crust has a higher temperature? ______________________ b) Which type of crust has a higher composition of silica? ______________________ c) Which type of crust has a higher composition of iron? ______________________ d) Which type of crust is thicker? ______________________ ...
... a) Which type of crust has a higher temperature? ______________________ b) Which type of crust has a higher composition of silica? ______________________ c) Which type of crust has a higher composition of iron? ______________________ d) Which type of crust is thicker? ______________________ ...
Oceans and Freshwater Ecosystems
... reefs, and estuaries. ● Marine algae is extremely important as it supplies much of the world’s oxygen and takes in a large amount of atmospheric carbon dioxide ...
... reefs, and estuaries. ● Marine algae is extremely important as it supplies much of the world’s oxygen and takes in a large amount of atmospheric carbon dioxide ...
Name: Pd: Plate Tectonics Unit Test Study Guide S6E5a. Compare
... 15. Fossils of tropical plants have been found in Antarctica. How is this evidence for the Theory of Continental drift? The fossils of tropical plants show that Antarctica used to be farther north, in warmer climate than it is today S6E5e. Recognize that lithospheric plates constantly move and cause ...
... 15. Fossils of tropical plants have been found in Antarctica. How is this evidence for the Theory of Continental drift? The fossils of tropical plants show that Antarctica used to be farther north, in warmer climate than it is today S6E5e. Recognize that lithospheric plates constantly move and cause ...
Earth Interior quest
... determine what percent of the whole each layer is equal to. 6. Is the “Rigid Mantle” a part of the crust? 7. How do you know that you have bones, a heart, lungs etc.? 8. Describe the density/ pressure/ and temperature of the composition of the Earth’s material as you gain depth. 9. Which layer conta ...
... determine what percent of the whole each layer is equal to. 6. Is the “Rigid Mantle” a part of the crust? 7. How do you know that you have bones, a heart, lungs etc.? 8. Describe the density/ pressure/ and temperature of the composition of the Earth’s material as you gain depth. 9. Which layer conta ...
Notes - Plate Tectonics
... youngest and gets older as you move farther away from the ridge - the oldest seafloor is about 260 million years (the oldest continental crust is 4.4 billion years old) ...
... youngest and gets older as you move farther away from the ridge - the oldest seafloor is about 260 million years (the oldest continental crust is 4.4 billion years old) ...
Oceanography Quick Notes
... In the abyssal plain you may find seamounts which are underwater volcanoes at current or former location of hot spots. In the abyssal plain you may also find guyots which are seamounts that are no longer active and have flat tops due to erosion by water movement. Mid-ocean ridges are chains of ...
... In the abyssal plain you may find seamounts which are underwater volcanoes at current or former location of hot spots. In the abyssal plain you may also find guyots which are seamounts that are no longer active and have flat tops due to erosion by water movement. Mid-ocean ridges are chains of ...
Using NGS Maps to Study Oceans
... a mid-ocean ridge which release hot, mineralrich water. Develop far offshore in geologically stable areas of low sedimentation, well beyond the continental margins. ...
... a mid-ocean ridge which release hot, mineralrich water. Develop far offshore in geologically stable areas of low sedimentation, well beyond the continental margins. ...
Lesson 11 - Subduction Boundary Volcanism
... Volcanoes are associated with two of the three types of plate boundaries, these being convergent and divergent boundaries. Very little volcanic activity is seen at transform fault boundaries. Volcanism associated with plate tectonic activity are found in three areas on Earth; 1) Ridges (or sprea ...
... Volcanoes are associated with two of the three types of plate boundaries, these being convergent and divergent boundaries. Very little volcanic activity is seen at transform fault boundaries. Volcanism associated with plate tectonic activity are found in three areas on Earth; 1) Ridges (or sprea ...
Earth Systems & Resources
... • Sea floor rocks were young in age (oldest 220 Ma) • Sea floor rocks magnetism showed a pattern that was identical to sea floor rock ages ...
... • Sea floor rocks were young in age (oldest 220 Ma) • Sea floor rocks magnetism showed a pattern that was identical to sea floor rock ages ...
Ocean Regions Day 2
... Key Points • The three major regions of the ocean floor are the continental margins, the ocean basin floor and the mid-ocean ridges. • The gently sloping submerged surface extending from the shoreline toward the deep ocean is called the continental shelf. • At the continental margin in the Pacific ...
... Key Points • The three major regions of the ocean floor are the continental margins, the ocean basin floor and the mid-ocean ridges. • The gently sloping submerged surface extending from the shoreline toward the deep ocean is called the continental shelf. • At the continental margin in the Pacific ...
Ocean Model Pre
... b. How do turbidity currents shape the continental slope? ____________________________________ _____________________________________________________________________________________ c. On the picture directly above, circle and label two places where turbidity currents are likely to have occurred. Als ...
... b. How do turbidity currents shape the continental slope? ____________________________________ _____________________________________________________________________________________ c. On the picture directly above, circle and label two places where turbidity currents are likely to have occurred. Als ...
Plate Tectonics – A Geologic Revolution
... Using the calculated spreading rate for each ocean basin, the age of the various magnetic reversals was determined. The result was a map showing the age of the seafloor. It turned out the oldest rocks in the ocean were about 200 Ma old, much younger than the oceans. ...
... Using the calculated spreading rate for each ocean basin, the age of the various magnetic reversals was determined. The result was a map showing the age of the seafloor. It turned out the oldest rocks in the ocean were about 200 Ma old, much younger than the oceans. ...
File
... Cools under ground slowly from magma allowing large cristals to grow. Contains mostly Silica with at least 20% Quartz. ...
... Cools under ground slowly from magma allowing large cristals to grow. Contains mostly Silica with at least 20% Quartz. ...
PT Dir Rdg
... part of the mantle 2. continental crust b. dense crust made of rock that is rich in iron and magnesium 3. tectonic plates c. blocks of Earth’s shell that ride on a deformable layer of the mantle 4. lithosphere d. solid, plastic layer of the mantle beneath the lithosphere 5. asthenosphere e. low-dens ...
... part of the mantle 2. continental crust b. dense crust made of rock that is rich in iron and magnesium 3. tectonic plates c. blocks of Earth’s shell that ride on a deformable layer of the mantle 4. lithosphere d. solid, plastic layer of the mantle beneath the lithosphere 5. asthenosphere e. low-dens ...
Text from Narration doc
... OCEANIC lithosphere, formed at spreading ridges, is typically 50–140 km thick. Oceanic crust is only around eight kilometers thick and is denser than continental crust because it contains less low-density silica, and more high-density iron and magnesium. Thus, it forms the ocean floor with its top s ...
... OCEANIC lithosphere, formed at spreading ridges, is typically 50–140 km thick. Oceanic crust is only around eight kilometers thick and is denser than continental crust because it contains less low-density silica, and more high-density iron and magnesium. Thus, it forms the ocean floor with its top s ...
Doing Hands-On Science with Students
... rises approximately 2000 meters from the surrounding ocean floor to a depth of 1100 meters. ...
... rises approximately 2000 meters from the surrounding ocean floor to a depth of 1100 meters. ...
Marine Biology Stahl History of Marine Science and Scientific
... ridge system. Magnetic readings of the rock show a reversal of the Earth’s magnetic field. How many km. east of the ridge system must scientists travel to collect a core sample with the same magnetic properties? What is the deepest underwater trench in the world? What are the nine pieces of evidence ...
... ridge system. Magnetic readings of the rock show a reversal of the Earth’s magnetic field. How many km. east of the ridge system must scientists travel to collect a core sample with the same magnetic properties? What is the deepest underwater trench in the world? What are the nine pieces of evidence ...
es1 and accel plate boundaries lab
... Earthquake and volcanic activity have revealed a map of the world of many plates. These plates consist of continental crust, oceanic crust or a combination of both. Places in the ocean tend to be made of oceanic crust, continental crust makes up the continents (including continental shelves) 1. List ...
... Earthquake and volcanic activity have revealed a map of the world of many plates. These plates consist of continental crust, oceanic crust or a combination of both. Places in the ocean tend to be made of oceanic crust, continental crust makes up the continents (including continental shelves) 1. List ...
Answer Key - With Teacher Comments given in class Plate
... - To easily tell the convergent boundary diagram, look for the “telltale” subduction zone area where a denser ocean crust is going under the other crust (less dense). - Convergent boundary with subduction (either ocean-ocean or ocean-continent): Landforms here = ocean trench, volcanic island arc (if ...
... - To easily tell the convergent boundary diagram, look for the “telltale” subduction zone area where a denser ocean crust is going under the other crust (less dense). - Convergent boundary with subduction (either ocean-ocean or ocean-continent): Landforms here = ocean trench, volcanic island arc (if ...
Ocean Bathymetry and Plate Tectonics
... plates act as giant radiators of heat. They cool, thicken, and gradually subside as they progress from ridge to trench forming the broad-scale patterns of ridges and deep ocean basins. ...
... plates act as giant radiators of heat. They cool, thicken, and gradually subside as they progress from ridge to trench forming the broad-scale patterns of ridges and deep ocean basins. ...
The Ocean Floor Chapter 14 Essentials of Geology, 8e
... bedding (decrease in sediment grain size from bottom to top) ...
... bedding (decrease in sediment grain size from bottom to top) ...
Chapter 14 Resource: Plate Tectonics
... Directions: Use the following terms to complete the puzzle below. The letters in the darker, vertical box complete question 9. Pangaea convection ...
... Directions: Use the following terms to complete the puzzle below. The letters in the darker, vertical box complete question 9. Pangaea convection ...
Plate Tectonics
... Thin sediment layer on ocean crust suggests oceans are younger than continents. The fact the layer thickens away from MORs suggests the crust gets older away from the ridge crest. Harry Hess suggested ocean crust was made at the ridges and destroyed at the trenches. Hess also suggested it was the li ...
... Thin sediment layer on ocean crust suggests oceans are younger than continents. The fact the layer thickens away from MORs suggests the crust gets older away from the ridge crest. Harry Hess suggested ocean crust was made at the ridges and destroyed at the trenches. Hess also suggested it was the li ...
AIM: Introduce you to scientific study of the world`s oceans and seas
... occur where slabs of lithosphere extend to depth •Recognize lithosphere by its relatively high seismic velocity & the relatively low attenuation of seismic waves ...
... occur where slabs of lithosphere extend to depth •Recognize lithosphere by its relatively high seismic velocity & the relatively low attenuation of seismic waves ...
Midterm Exam 1 Study Guide
... Describe the general idea of plate tectonics. What are the direct and indirect evidence for continental drift? What are the three ways plates can move relative to one another? Provide examples of each type of plate boundary. What are the differences between oceanic crust and continental crust? What ...
... Describe the general idea of plate tectonics. What are the direct and indirect evidence for continental drift? What are the three ways plates can move relative to one another? Provide examples of each type of plate boundary. What are the differences between oceanic crust and continental crust? What ...
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.