Q. What is the concept of plate tectonics theory?
... Q. What is the concept of plate tectonics theory? - It is a scientific theory which describes the large scale motion of Earth’s lithosphere. The theory builds on the older concepts of continental drift developed by Alfred Wegner and seafloor spreading. Where the plates are relatively moving towards ...
... Q. What is the concept of plate tectonics theory? - It is a scientific theory which describes the large scale motion of Earth’s lithosphere. The theory builds on the older concepts of continental drift developed by Alfred Wegner and seafloor spreading. Where the plates are relatively moving towards ...
Plate Tectonics -- Structure and Behavior of Oceanic Ridges
... Ridges are the centers of spreading in seafloor spreading. The crust “ages” away from them. In some cases (Atlantic and Indian) they originally formed under a continent. This rifted the continent and subsequently separated the pieces. In these cases the continental edges on either side appear to fit ...
... Ridges are the centers of spreading in seafloor spreading. The crust “ages” away from them. In some cases (Atlantic and Indian) they originally formed under a continent. This rifted the continent and subsequently separated the pieces. In these cases the continental edges on either side appear to fit ...
key1 - Scioly.org
... e. basalt is pushing up through the trench that parallels the west coast of South America. 5. Pick out the FALSE statement. According to present plate tectonics theory, a. plates move on the asthenosphere. b. plates move at speeds of a few centimeters per year. c. a continental plate will subduct un ...
... e. basalt is pushing up through the trench that parallels the west coast of South America. 5. Pick out the FALSE statement. According to present plate tectonics theory, a. plates move on the asthenosphere. b. plates move at speeds of a few centimeters per year. c. a continental plate will subduct un ...
test - Scioly.org
... e. basalt is pushing up through the trench that parallels the west coast of South America. 5. Pick out the FALSE statement. According to present plate tectonics theory, a. plates move on the asthenosphere. b. plates move at speeds of a few centimeters per year. c. a continental plate will subduct un ...
... e. basalt is pushing up through the trench that parallels the west coast of South America. 5. Pick out the FALSE statement. According to present plate tectonics theory, a. plates move on the asthenosphere. b. plates move at speeds of a few centimeters per year. c. a continental plate will subduct un ...
Exam 1 Study Guide - School of Ocean and Earth Science and
... Describe how primary productivity varies with season in tropical, temperate and polar seas. Describe and explain movement of the Deep Scattering Layer. Give an example of a simple food chain having three trophic levels. What does the term “trophic pyramid” refer to? Which would you expect to have gr ...
... Describe how primary productivity varies with season in tropical, temperate and polar seas. Describe and explain movement of the Deep Scattering Layer. Give an example of a simple food chain having three trophic levels. What does the term “trophic pyramid” refer to? Which would you expect to have gr ...
active geological processes controlling seismisity in northeast russia
... seismogenic structures are formed. The boundary between the Eurasian and Chinese (Amurian) plates in marked by the BaikalStanovoy seismic belt representing a band of earthquake epicenters extending along the southern margin of the Siberian platform from Lake Baikal in the west to Uda Bay of the Sea ...
... seismogenic structures are formed. The boundary between the Eurasian and Chinese (Amurian) plates in marked by the BaikalStanovoy seismic belt representing a band of earthquake epicenters extending along the southern margin of the Siberian platform from Lake Baikal in the west to Uda Bay of the Sea ...
chapter 2 - Geophile.net
... 9. Why do many oceanic volcanoes occur as long lines of volcanoes that are active at only one end? How does the process work? * They are hotspot volcanoes. A hot plume of magma rising through the mantle burns through the overlying lithosphere to erupt as a volcano. Since the lithosphere moves over t ...
... 9. Why do many oceanic volcanoes occur as long lines of volcanoes that are active at only one end? How does the process work? * They are hotspot volcanoes. A hot plume of magma rising through the mantle burns through the overlying lithosphere to erupt as a volcano. Since the lithosphere moves over t ...
chapter 2 - Geophile.net
... 9. Why do many oceanic volcanoes occur as long lines of volcanoes that are active at only one end? How does the process work? * They are hotspot volcanoes. A hot plume of magma rising through the mantle burns through the overlying lithosphere to erupt as a volcano. Since the lithosphere moves over t ...
... 9. Why do many oceanic volcanoes occur as long lines of volcanoes that are active at only one end? How does the process work? * They are hotspot volcanoes. A hot plume of magma rising through the mantle burns through the overlying lithosphere to erupt as a volcano. Since the lithosphere moves over t ...
What adaptations allow deep-sea creatures to survive in extreme
... Location Near Antarctica in the Southern Pacific, 7,200 feet below the surface lies a chain of hydrothermal vents. This area has only recently been explored by a team of scientists. Because scientists are not adapted for deep-sea life, they used a remote-controlled underwater vehicle to explore the ...
... Location Near Antarctica in the Southern Pacific, 7,200 feet below the surface lies a chain of hydrothermal vents. This area has only recently been explored by a team of scientists. Because scientists are not adapted for deep-sea life, they used a remote-controlled underwater vehicle to explore the ...
6-5 Ocean Life Zones PPT - Lyndhurst School District
... MAJOR OCEAN LIFE ZONES: OCEANIC PROVINCE (DEEP-SEA) Ø fish adapted to darkness & scarcity of food Ø drift or are slow moving à reduced bone & ...
... MAJOR OCEAN LIFE ZONES: OCEANIC PROVINCE (DEEP-SEA) Ø fish adapted to darkness & scarcity of food Ø drift or are slow moving à reduced bone & ...
Chapter 6 Section 2
... Tectonic plate boundaries are located by studying the locations of earthquakes, volcanoes, and landforms such as mid-ocean ridges and ocean trenches. ...
... Tectonic plate boundaries are located by studying the locations of earthquakes, volcanoes, and landforms such as mid-ocean ridges and ocean trenches. ...
PlateMovement 1.76MB 2017-03
... in the year A.D. 930. (Photograph by Oddur Sigurdsson, National Energy Authority, ...
... in the year A.D. 930. (Photograph by Oddur Sigurdsson, National Energy Authority, ...
Plate Movement - A2PlateTectonics
... in the year A.D. 930. (Photograph by Oddur Sigurdsson, National Energy Authority, ...
... in the year A.D. 930. (Photograph by Oddur Sigurdsson, National Energy Authority, ...
File
... • Wegener was a meteorologist and his theory was not well accepted. (He died on an expedition in Greenland collecting ice samples) ...
... • Wegener was a meteorologist and his theory was not well accepted. (He died on an expedition in Greenland collecting ice samples) ...
Name: Date: Period:______ ASSIGN PLATE TECTONICS REVIEW
... When you look at a map of earthquakes and volcanoes happening around the world, where are the majority of the earthquakes and volcanoes happening? Why? Earthquakes and volcanoes occur at plate boundaries because magma can rise to the surface of the Earth in those places. Also, pressure is high at th ...
... When you look at a map of earthquakes and volcanoes happening around the world, where are the majority of the earthquakes and volcanoes happening? Why? Earthquakes and volcanoes occur at plate boundaries because magma can rise to the surface of the Earth in those places. Also, pressure is high at th ...
File
... Oceanic and oceanic plate convergence result in the formation of volcano chains and island arcs. The crust that is pulled under or subducted melts to form magma. This magma rises to the top of the overriding oceanic plates and erupts on the ocean floor. Over millions of years, the lava and debris fr ...
... Oceanic and oceanic plate convergence result in the formation of volcano chains and island arcs. The crust that is pulled under or subducted melts to form magma. This magma rises to the top of the overriding oceanic plates and erupts on the ocean floor. Over millions of years, the lava and debris fr ...
Supplemental Earth Science Review Questions
... B. Rock samples taken near the Mid-Atlantic Ridge are much younger than those taken near the west coast of Africa and the east coast of South America. C. Stripes of rock from the Mid-Atlantic Ridge have alternating magnetic polarities. D. There is more sediment along the continental shelf than on th ...
... B. Rock samples taken near the Mid-Atlantic Ridge are much younger than those taken near the west coast of Africa and the east coast of South America. C. Stripes of rock from the Mid-Atlantic Ridge have alternating magnetic polarities. D. There is more sediment along the continental shelf than on th ...
Important Oceanography Stuff
... continental arc: oceanic-continental collision [basalt+granite=destructive eruption island arc: oceanic-oceanic collision; older, denser sea floor subducts [basalt+baslt=not destructive] older continental lithosphere no denser than young continental-continental no subduction, high mountains result t ...
... continental arc: oceanic-continental collision [basalt+granite=destructive eruption island arc: oceanic-oceanic collision; older, denser sea floor subducts [basalt+baslt=not destructive] older continental lithosphere no denser than young continental-continental no subduction, high mountains result t ...
Lesson 2 What Are the Characteristics of the Ocean? Fast Fact
... surface. Many of these landforms are found along the mid-ocean ridges. Here, the tectonic plates of Earth's crust are being split apart. As the plates are pulled apart, molten rock pushes up from below. It forms new ocean floor and a vast mountain range. Where two oceanic plates run into each other, ...
... surface. Many of these landforms are found along the mid-ocean ridges. Here, the tectonic plates of Earth's crust are being split apart. As the plates are pulled apart, molten rock pushes up from below. It forms new ocean floor and a vast mountain range. Where two oceanic plates run into each other, ...
What is Marine Science
... o 1872, _______________________________ was the first scientific voyage. It lasted only 3 years, but took 20 years to analyze the data collected. ...
... o 1872, _______________________________ was the first scientific voyage. It lasted only 3 years, but took 20 years to analyze the data collected. ...
The Ocean-Atmosphere Hydrothermohaline Conveyor Belt
... The ocean thermohaline circulation is linked to the hydrothermal circulation of the atmosphere. The ocean thermohaline circulation is expressed in potential temperature-salinity space and comprises a tropical upper-ocean circulation, a global conveyor belt cell and an Antarctic Bottom Water cell. Th ...
... The ocean thermohaline circulation is linked to the hydrothermal circulation of the atmosphere. The ocean thermohaline circulation is expressed in potential temperature-salinity space and comprises a tropical upper-ocean circulation, a global conveyor belt cell and an Antarctic Bottom Water cell. Th ...
The Modern Theory of Plate Tectonics
... And as Plate Tectonics swept through the scientific world, scientists from all branches of science found that it explained so many things so well. Mountains Volcanoes ...
... And as Plate Tectonics swept through the scientific world, scientists from all branches of science found that it explained so many things so well. Mountains Volcanoes ...
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.