UNIT 10 Plate Tectonics Study Guide
... - Radioactive age-dating of the oceanic basalt rock core was found to be youngest at the ocean’s mountainous center and no more than 200 million years old at the ocean edges near the continents. - The oldest deep oceanic sediments, called “oozes” are no more than 200 million years old. (It is estim ...
... - Radioactive age-dating of the oceanic basalt rock core was found to be youngest at the ocean’s mountainous center and no more than 200 million years old at the ocean edges near the continents. - The oldest deep oceanic sediments, called “oozes” are no more than 200 million years old. (It is estim ...
Worksheet as a MS Word file ( format)
... appeared that the oceanic lithosphere should be older with greater distance from the center of the mid-ocean ridge where it first formed By matching the reversal history to the magnetic patterns under the sea, and assuming seafloor spreading, the age of a particular piece of oceanic lithosphere coul ...
... appeared that the oceanic lithosphere should be older with greater distance from the center of the mid-ocean ridge where it first formed By matching the reversal history to the magnetic patterns under the sea, and assuming seafloor spreading, the age of a particular piece of oceanic lithosphere coul ...
Name Date_________Core____ Inside the Restless Earth – Ch. 4
... joined together (Wegener included this in his theory); can date back to 245 million years ago ...
... joined together (Wegener included this in his theory); can date back to 245 million years ago ...
expedition 8 worksheet as a pdf
... appeared that the oceanic lithosphere should be older with greater distance from the center of the mid-ocean ridge where it first formed By matching the reversal history to the magnetic patterns under the sea, and assuming seafloor spreading, the age of a particular piece of oceanic lithosphere coul ...
... appeared that the oceanic lithosphere should be older with greater distance from the center of the mid-ocean ridge where it first formed By matching the reversal history to the magnetic patterns under the sea, and assuming seafloor spreading, the age of a particular piece of oceanic lithosphere coul ...
plate tectonics - Madison County Schools
... • Earth’s crust is broken into many jagged pieces. The surface is like the shell of a hard-boiled egg that has been rolled. The pieces of Earth’s crust are called plates. Plates carry continents, oceans floors, or both. ...
... • Earth’s crust is broken into many jagged pieces. The surface is like the shell of a hard-boiled egg that has been rolled. The pieces of Earth’s crust are called plates. Plates carry continents, oceans floors, or both. ...
background information on hydrothermal vents
... Black and white smokers Some hydrothermal vents form a chimney like structure that can be as 60m tall. They are formed when the minerals that are dissolved in the fluid precipitates out when the super-heated water comes into contact with the freezing seawater. The minerals become particles with high ...
... Black and white smokers Some hydrothermal vents form a chimney like structure that can be as 60m tall. They are formed when the minerals that are dissolved in the fluid precipitates out when the super-heated water comes into contact with the freezing seawater. The minerals become particles with high ...
Plate Tectonics Tectonics
... and features are common among the now separate southern continents… But they are now near the equator! Huh? Also, the direction of ice movement is from what is now the sea towards the interiors! Huh? These observations only make sense if the southern continents were once joined and were at the south ...
... and features are common among the now separate southern continents… But they are now near the equator! Huh? Also, the direction of ice movement is from what is now the sea towards the interiors! Huh? These observations only make sense if the southern continents were once joined and were at the south ...
Seafloor Spreading - Madison Public Schools
... •Sea-floor spreading is the process in which the ocean floor is extended when two plates move apart. As the plates move apart, the rocks break and form a crack between the plates. Earthquakes occur along the plate boundary. Magma rises through the cracks and seeps out onto the ocean floor like a lo ...
... •Sea-floor spreading is the process in which the ocean floor is extended when two plates move apart. As the plates move apart, the rocks break and form a crack between the plates. Earthquakes occur along the plate boundary. Magma rises through the cracks and seeps out onto the ocean floor like a lo ...
Chapter 9 - reynolds study center
... 1. A mid-ocean ridge is a site where the asthenosphere rises and cools to create a new lithosphere as plates separate/diverge. 2. TRUE 3. An atoll is a coral island that, as a result of plate subduction, has sunk to the point where the coral reef protects the island from erosion, but not from submer ...
... 1. A mid-ocean ridge is a site where the asthenosphere rises and cools to create a new lithosphere as plates separate/diverge. 2. TRUE 3. An atoll is a coral island that, as a result of plate subduction, has sunk to the point where the coral reef protects the island from erosion, but not from submer ...
Asthenosphere, Lithosphere, Convection
... A tectonic plate is made of the lithosphere. The lithosphere is crust (oceanic or continental) connected to a hard rock layer below Tectonic plates are moved by the asthenosphere The asthenosphere is a slushy part of the Upper Mantle ...
... A tectonic plate is made of the lithosphere. The lithosphere is crust (oceanic or continental) connected to a hard rock layer below Tectonic plates are moved by the asthenosphere The asthenosphere is a slushy part of the Upper Mantle ...
Document
... Oceanic lithosphere subducts underneath the continental lithosphere Oceanic lithosphere heats and dehydrates as it subsides The melt rises forming volcanism E.g. The Andes ...
... Oceanic lithosphere subducts underneath the continental lithosphere Oceanic lithosphere heats and dehydrates as it subsides The melt rises forming volcanism E.g. The Andes ...
Chapter-2_PracticeTest
... 7. If you used the theory of plate tectonics to predict the most likely place for the next earthquake or volcanic eruption, you should predict that it is most likely to occur a) along boundaries between colliding lithospheric plates. b) where one has not happened in at least 10 million years. c) ...
... 7. If you used the theory of plate tectonics to predict the most likely place for the next earthquake or volcanic eruption, you should predict that it is most likely to occur a) along boundaries between colliding lithospheric plates. b) where one has not happened in at least 10 million years. c) ...
Bell Activity #13
... A. Mid-Ocean Ridges and Sea-Floor Spreading Midocean ridges are places where sea-floor spreading takes place.Sea-floor spreading is the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies. ...
... A. Mid-Ocean Ridges and Sea-Floor Spreading Midocean ridges are places where sea-floor spreading takes place.Sea-floor spreading is the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies. ...
The Structure of the Earth and Plate Tectonics
... Iceland: An example of continental rifting • ICELAND HAS A DIVERGENT PLATE BOUNDARY RUNNING THROUGH ITS MIDDLE ...
... Iceland: An example of continental rifting • ICELAND HAS A DIVERGENT PLATE BOUNDARY RUNNING THROUGH ITS MIDDLE ...
Document
... A present-day mantle upwelling beneath Iceland dynamically supports the bathymetry of the North Atlantic Ocean. Varying dynamic support has controlled uplift and subsidence at Earth's surface throughout Neogene times. Intersection of the Mid-Atlantic Ridge with the Iceland plume provides us with a w ...
... A present-day mantle upwelling beneath Iceland dynamically supports the bathymetry of the North Atlantic Ocean. Varying dynamic support has controlled uplift and subsidence at Earth's surface throughout Neogene times. Intersection of the Mid-Atlantic Ridge with the Iceland plume provides us with a w ...
Material properties and microstructure from
... deeps, the bathymetric data show strong influence of salt/sediment flow as well as land slides into the deeps, which in some cases cover large parts of the graben structures. Due to sedimentation, indications of ridge offsets between the deeps are covered by sediments and the tectonics of ridge tran ...
... deeps, the bathymetric data show strong influence of salt/sediment flow as well as land slides into the deeps, which in some cases cover large parts of the graben structures. Due to sedimentation, indications of ridge offsets between the deeps are covered by sediments and the tectonics of ridge tran ...
Week 6
... However, sometimes they don’t break the surface. The ocean floor is dotted by a number of these volcanoes which are called sea mounts. Oftentimes chains of these volcanoes are seen. ...
... However, sometimes they don’t break the surface. The ocean floor is dotted by a number of these volcanoes which are called sea mounts. Oftentimes chains of these volcanoes are seen. ...
Chapter 14 Resource: Plate Tectonics
... 18. Seafloor spreading occurs because ______. a. new material is being added to the asthenosphere b. earthquakes break apart the ocean floor c. sediments accumulate on the ocean floor d. hot, less-dense material below Earth’s crust is forced upward toward the surface ...
... 18. Seafloor spreading occurs because ______. a. new material is being added to the asthenosphere b. earthquakes break apart the ocean floor c. sediments accumulate on the ocean floor d. hot, less-dense material below Earth’s crust is forced upward toward the surface ...
Palaeontology, Pangaea, Plate Tectoncs
... Plate Tectonic understanding of sea-floor spreading maintains that (Jurassic – Recent) crust below the oceans is basaltic, apart from local occurrences of extended continental crust adjacent to continents. However, abundant samples of continental material, some as old as Precambrian - Palaeozoic, ha ...
... Plate Tectonic understanding of sea-floor spreading maintains that (Jurassic – Recent) crust below the oceans is basaltic, apart from local occurrences of extended continental crust adjacent to continents. However, abundant samples of continental material, some as old as Precambrian - Palaeozoic, ha ...
Test Review: Geosphere Part 1: Lithosphere, Earthquakes
... 10. The asthenosphere is _the layer below the lithosphere (helps it move) liquid-solid_____. 11. There are three ways that the lithosphere crust moves on the mantle. A. __Convection current______________ - Hot less dense material rises up to the crust, cools, and the denser colder material sinks bac ...
... 10. The asthenosphere is _the layer below the lithosphere (helps it move) liquid-solid_____. 11. There are three ways that the lithosphere crust moves on the mantle. A. __Convection current______________ - Hot less dense material rises up to the crust, cools, and the denser colder material sinks bac ...
Optional GEOL 103 Writing Assignment KEY
... removed by erosion or ice melting. The continental crust is thus thicker than oceanic crust because of its lower density. Mountains can have deep roots, and can also stick up into the air due to this phenomenon. 4) What happens to continents as they are stripped of sediment due to erosion or as glac ...
... removed by erosion or ice melting. The continental crust is thus thicker than oceanic crust because of its lower density. Mountains can have deep roots, and can also stick up into the air due to this phenomenon. 4) What happens to continents as they are stripped of sediment due to erosion or as glac ...
Science multi-choice
... Any planning sheets or other pieces of paper MUST be handed in with this booklet. At the end of the examination make sure that your name is on your booklet and any other pieces of paper used. Do not turn this page until you are asked to do so. ...
... Any planning sheets or other pieces of paper MUST be handed in with this booklet. At the end of the examination make sure that your name is on your booklet and any other pieces of paper used. Do not turn this page until you are asked to do so. ...
Mid-ocean Ridge Spreading
... ago and contain oceanic crust (the upper layer of the lithosphere) that is 6 million years old and older. Slowly slide the two foam pieces away from each other about 2 cm. This will represent the passage of time and will demonstrate how magma pushes up through the mid-ocean ridge creating new ocean ...
... ago and contain oceanic crust (the upper layer of the lithosphere) that is 6 million years old and older. Slowly slide the two foam pieces away from each other about 2 cm. This will represent the passage of time and will demonstrate how magma pushes up through the mid-ocean ridge creating new ocean ...
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.