deep-ocean basin
... the deep-ocean basin Abyssal plains cover about half of the deepocean basins and are the flattest regions on Earth. Layers of fine sediment cover the abyssal plains. The thickness of sediments on the abyssal plains is determined by the age of the oceanic crust, the distance from the continental marg ...
... the deep-ocean basin Abyssal plains cover about half of the deepocean basins and are the flattest regions on Earth. Layers of fine sediment cover the abyssal plains. The thickness of sediments on the abyssal plains is determined by the age of the oceanic crust, the distance from the continental marg ...
Ophiolite_ppt_presentation
... components that interact in plate tectonic theory. Six Tectonic Regimes 1. Cratons (Stable Continents) – composed of light-weight rocks that float above sea level on hot plastic interior asthenosphere. Rocks are felsic & intermediate igneous rocks like granite & diorite or their equivalents schist & ...
... components that interact in plate tectonic theory. Six Tectonic Regimes 1. Cratons (Stable Continents) – composed of light-weight rocks that float above sea level on hot plastic interior asthenosphere. Rocks are felsic & intermediate igneous rocks like granite & diorite or their equivalents schist & ...
History of Deep Sea Biology - Monterey Bay Aquarium Research
... www.creationism.org/ books/TaylorInMindsMen ...
... www.creationism.org/ books/TaylorInMindsMen ...
Seafloor spreading
... recognition in science. Seismological investigations showed that the Earth merely has a thin solid crust that floats on a plastic mantle. Deep inside our planet there’s a very hot core. The Earth’s crust, which contains the continents and seafloor, is geologically divided into seven large and numero ...
... recognition in science. Seismological investigations showed that the Earth merely has a thin solid crust that floats on a plastic mantle. Deep inside our planet there’s a very hot core. The Earth’s crust, which contains the continents and seafloor, is geologically divided into seven large and numero ...
Plate Tectonics Study Guide: Answer key
... o Describe new evidence that lead to today’s Theory of Plate Tectonics Sea Floor Spreading: Found mid ocean ridges and trenches. Rock near center of mid ocean ridge was younger than rock near trench. ...
... o Describe new evidence that lead to today’s Theory of Plate Tectonics Sea Floor Spreading: Found mid ocean ridges and trenches. Rock near center of mid ocean ridge was younger than rock near trench. ...
Questions from the Video
... Answer the following questions from the Plate Dynamics Video 1. What is the San Andreas Fault comprised of? ...
... Answer the following questions from the Plate Dynamics Video 1. What is the San Andreas Fault comprised of? ...
Sea Floor Spreading
... In some cases, oceanic crust encounters an active plate margin. An active plate margin is an actual plate boundary, where oceanic crust and continental crust crash into each other. Active plate margins are often the site of earthquakes and volcanoes. Oceanic crust created by seafloor spreading in th ...
... In some cases, oceanic crust encounters an active plate margin. An active plate margin is an actual plate boundary, where oceanic crust and continental crust crash into each other. Active plate margins are often the site of earthquakes and volcanoes. Oceanic crust created by seafloor spreading in th ...
Convection Cell Slab Pull Ridge Push
... 16. What was the name of the supercontinent? When did it last form? When did it break apart? When will it form again? ...
... 16. What was the name of the supercontinent? When did it last form? When did it break apart? When will it form again? ...
SEISMIC ACTIVITY (mainly shallow earthquakes)
... introduction of new magnetic material occur in a zone with width from 0 til 10 km. Even in a relatively broad volcanic zone there is an identifiable magnetic anomaly-pattern The magnetic anomalies are among the best evidence for seafloor spreading. It is hard to explain this pattern in other ways, a ...
... introduction of new magnetic material occur in a zone with width from 0 til 10 km. Even in a relatively broad volcanic zone there is an identifiable magnetic anomaly-pattern The magnetic anomalies are among the best evidence for seafloor spreading. It is hard to explain this pattern in other ways, a ...
made up of hard metal. it is about 1300 km thick. it is 2% of the
... IT IS JUST BELOW THE CRUST. IT IS WEAKENED BY HEAT. IT IS WITHOUT STRENGTH. ...
... IT IS JUST BELOW THE CRUST. IT IS WEAKENED BY HEAT. IT IS WITHOUT STRENGTH. ...
Wegener—Continental Drift
... can explain why crops fail. B. All volcanoes are destructive and have negative effects worldwide. C. The causes of volcanic eruptions describe why climates will change around the volcano. D. Studying the effects of volcanic eruptions can help scientists determine their impact on human life. ...
... can explain why crops fail. B. All volcanoes are destructive and have negative effects worldwide. C. The causes of volcanic eruptions describe why climates will change around the volcano. D. Studying the effects of volcanic eruptions can help scientists determine their impact on human life. ...
Word format
... 21. North America and Europe seem to show different paleomagnetic north pole locations for similaraged rocks. The reason for this is: A. there was more than one north pole when these rocks formed B. the pole was wandering around so the paleomagnetic record is inaccurate C. North America and Europe ...
... 21. North America and Europe seem to show different paleomagnetic north pole locations for similaraged rocks. The reason for this is: A. there was more than one north pole when these rocks formed B. the pole was wandering around so the paleomagnetic record is inaccurate C. North America and Europe ...
Layers of Earth`s Interior Continental Drift/Seafloor
... continental crust (thick, less dense) ...
... continental crust (thick, less dense) ...
Oceans
... • Found in all oceans: Atlantic ocean has fewer trenches, so it has more extensive abyssal plains than does the pacific • Seamounts and guyots • Isolated volcanic peaks (conical steep sided and hundred of meters high) • Many form near oceanic ridges and the greatest number found in the Pacific. • Ma ...
... • Found in all oceans: Atlantic ocean has fewer trenches, so it has more extensive abyssal plains than does the pacific • Seamounts and guyots • Isolated volcanic peaks (conical steep sided and hundred of meters high) • Many form near oceanic ridges and the greatest number found in the Pacific. • Ma ...
Unit1EarthsStructure 104.50KB 2017-03-29 12
... combination of radioactive decay in the core and residual primary heat. This heat causes the convection currents to rise (rising limb), until they reach the lithosphere where they diverge. Where the convection current descends (descending limb), due to cooling, the lithosphere is pulled downwards (k ...
... combination of radioactive decay in the core and residual primary heat. This heat causes the convection currents to rise (rising limb), until they reach the lithosphere where they diverge. Where the convection current descends (descending limb), due to cooling, the lithosphere is pulled downwards (k ...
Chapter 10 * Plate Tectonics
... The Pacific Ring of Fire is a zone of active volcanoes that surround the Pacific Ocean. ...
... The Pacific Ring of Fire is a zone of active volcanoes that surround the Pacific Ocean. ...
Name - mrspilkington
... continental drift. He believed that the continents were drifting apart. He found evidence to prove his theory. But he could not answer one question. How were the continents moving? He thought they were plowing through the ocean crust. Other scientists knew this could not happen. ...
... continental drift. He believed that the continents were drifting apart. He found evidence to prove his theory. But he could not answer one question. How were the continents moving? He thought they were plowing through the ocean crust. Other scientists knew this could not happen. ...
Diversity, Distribution, Abundance - Census of Marine Life Maps and
... the Celebes Sea. This animal has been observed at depths to 2,700 meters, sweeping food-rich sediment into its mouth. ...
... the Celebes Sea. This animal has been observed at depths to 2,700 meters, sweeping food-rich sediment into its mouth. ...
Paleomagnetism: Divergent Boundary
... also discovered. They also discovered deep sea trenches which are narrow elongated depressions in the seafloor with very steep sides. The deepest trench is in the Pacific Ocean which is called the Mariana Trench. The ages of the rocks on the seafloor vary in ages in different places. The age increas ...
... also discovered. They also discovered deep sea trenches which are narrow elongated depressions in the seafloor with very steep sides. The deepest trench is in the Pacific Ocean which is called the Mariana Trench. The ages of the rocks on the seafloor vary in ages in different places. The age increas ...
Chapter 11 Notes: Plate Tectonics
... o Mapped ocean floor with sonar – device that uses sound waves to measure the distance of an object o Discovered steep-sided valleys split the top of some mid-ocean ridges Sea-floor spreading – new magma/lava rises from inside the Earth, erupts, cools, and hardens inside the central valley of a mid- ...
... o Mapped ocean floor with sonar – device that uses sound waves to measure the distance of an object o Discovered steep-sided valleys split the top of some mid-ocean ridges Sea-floor spreading – new magma/lava rises from inside the Earth, erupts, cools, and hardens inside the central valley of a mid- ...
File
... wandered throughout the world. Either (1) the magnetic poles migrated through time, or (2) the continents had drifted. Movement of the continents was more reasonable. Seafloor spreading was confirmed by magnetic reversals recorded in the seafloor. p.641 fig.27.5 & p.642 p2 & fig.27.7 7. What did the ...
... wandered throughout the world. Either (1) the magnetic poles migrated through time, or (2) the continents had drifted. Movement of the continents was more reasonable. Seafloor spreading was confirmed by magnetic reversals recorded in the seafloor. p.641 fig.27.5 & p.642 p2 & fig.27.7 7. What did the ...
Fundamental Concepts and Skills
... 2. The lithosphere is the solid outer shell of Earth. It is divided into plates that are in motion with respect to one another. 3. There are two different types of crust (oceanic and continental) that have very different characteristics. ...
... 2. The lithosphere is the solid outer shell of Earth. It is divided into plates that are in motion with respect to one another. 3. There are two different types of crust (oceanic and continental) that have very different characteristics. ...
SEA-FLOOR SPREADING
... sunlight • Cold---temp near freezing • Areas where there is space between the plates allows water down into the crust, then brings it back up. • These warm areas provide a great area for life to thrive, and support information given by Wegener’s “continental drift” theory. ...
... sunlight • Cold---temp near freezing • Areas where there is space between the plates allows water down into the crust, then brings it back up. • These warm areas provide a great area for life to thrive, and support information given by Wegener’s “continental drift” theory. ...
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.