Seafloor Spreading (LT 1, 3-5)
... from the mid-ocean ridge on either side, the rocks get progressively older. This suggests that new rock (crust) is being formed at the mid-ocean ridge, and is pushing the seafloor away from the midocean ridge like a conveyer belt. ...
... from the mid-ocean ridge on either side, the rocks get progressively older. This suggests that new rock (crust) is being formed at the mid-ocean ridge, and is pushing the seafloor away from the midocean ridge like a conveyer belt. ...
A. Identifying Tectonic Plate Boundaries B. Tectonic Plate Movement
... Draw a diagram of seafloor spreading. (See the one in your Course Notebook.) Label the “ocean crust”, “continental crust”, “upper mantle”, & “magma”. Add red arrows that show what direction the Ocean Crust and magma are moving. Explain what is causing the magma to rise. ...
... Draw a diagram of seafloor spreading. (See the one in your Course Notebook.) Label the “ocean crust”, “continental crust”, “upper mantle”, & “magma”. Add red arrows that show what direction the Ocean Crust and magma are moving. Explain what is causing the magma to rise. ...
A. Identifying Tectonic Plate Boundaries B. Tectonic Plate Movement
... Draw a diagram of seafloor spreading. (See the one in your Course Notebook.) Label the “ocean crust”, “continental crust”, “upper mantle”, & “magma”. Add red arrows that show what direction ...
... Draw a diagram of seafloor spreading. (See the one in your Course Notebook.) Label the “ocean crust”, “continental crust”, “upper mantle”, & “magma”. Add red arrows that show what direction ...
Geological and Physical Factors of the Marine
... of submarine volcanoes that run through the ocean basins. Earthquakes and volcanoes are associated with the mid-ocean ridge. The Earth’s surface is broken up into a number of plates that are separated by the earthquake belts, which are trenches, ridges and faults. a. There are 7 major plates: i. Nor ...
... of submarine volcanoes that run through the ocean basins. Earthquakes and volcanoes are associated with the mid-ocean ridge. The Earth’s surface is broken up into a number of plates that are separated by the earthquake belts, which are trenches, ridges and faults. a. There are 7 major plates: i. Nor ...
Seafloor Spreading and Plate Tectonics
... • Comparable to current day situation in East Africa Rift • Demonstrates how initiation of seafloor spreading leads to formation of new ocean basins ...
... • Comparable to current day situation in East Africa Rift • Demonstrates how initiation of seafloor spreading leads to formation of new ocean basins ...
Dynamic Notes
... The asthenosphere is the layer of the Earth that lies below the lithosphere. This Plastic Mantle contains rock that is partially melted and slowly moving below the lithospheric plates. This allows the tectonic plates of the lithosphere to move around on the Earth's surface by “riding" on the convect ...
... The asthenosphere is the layer of the Earth that lies below the lithosphere. This Plastic Mantle contains rock that is partially melted and slowly moving below the lithospheric plates. This allows the tectonic plates of the lithosphere to move around on the Earth's surface by “riding" on the convect ...
Lesson 1: Earth Energy Lesson
... As the mantle moves around, the crust “floating” on top of it is “deformed” into different shapes and features! ...
... As the mantle moves around, the crust “floating” on top of it is “deformed” into different shapes and features! ...
Chapter 6 Plate Tectonics
... States that Earth’s lithosphere is broken into huge plates that move over the surface of the Earth Driving force of this movement is the convection current in the Asthenosphere Most major earthquakes, volcanoes, and mountain ranges are where two plates meet. ...
... States that Earth’s lithosphere is broken into huge plates that move over the surface of the Earth Driving force of this movement is the convection current in the Asthenosphere Most major earthquakes, volcanoes, and mountain ranges are where two plates meet. ...
Plate Tectonics 1. Continental Drift
... -Later support for continental drift 6) Sea floor spreading -Young rocks found along Mid-Atlantic ridge in 1947 -Ridge is a break in the Earth’s crust -Ocean floor is moving away from ridge with new magma filling the gap -Ocean floor moving = continents moving 7) Paleomagnetism -Earth is a giant mag ...
... -Later support for continental drift 6) Sea floor spreading -Young rocks found along Mid-Atlantic ridge in 1947 -Ridge is a break in the Earth’s crust -Ocean floor is moving away from ridge with new magma filling the gap -Ocean floor moving = continents moving 7) Paleomagnetism -Earth is a giant mag ...
Mr. Phillips Earth Structure and Plate Tectonics Reading Questions
... ___ 12. The boundary between two plates that are moving apart is a ____ boundary, a. convergent b. divergent ___ 13. When ocean plates collide with continental plates, the denser ocean plate ____ a. sinks b. rises ___ 14. A ____ is created where one plate moves under another. a. ridge push b. subduc ...
... ___ 12. The boundary between two plates that are moving apart is a ____ boundary, a. convergent b. divergent ___ 13. When ocean plates collide with continental plates, the denser ocean plate ____ a. sinks b. rises ___ 14. A ____ is created where one plate moves under another. a. ridge push b. subduc ...
and at the subduction zones Lesser Antilles Subduction Zone
... Strange grooves cut by ancient glaciers that line up ...
... Strange grooves cut by ancient glaciers that line up ...
Geology Chapter 7 Study Guide with lines
... ____________________________________________________________________ ____________________________________________________________________ 14. Where does seafloor spreading occur? _____________________________________ ____________________________________________________________________ 15. What cause ...
... ____________________________________________________________________ ____________________________________________________________________ 14. Where does seafloor spreading occur? _____________________________________ ____________________________________________________________________ 15. What cause ...
Lesson 2/3: Movement of Tectonic Plates
... Mantle convection: Fill in blanks in the following using the above and the video to help ...
... Mantle convection: Fill in blanks in the following using the above and the video to help ...
Continental Drift
... Why didn’t people believe in continental drift? People couldn’t imagine how the earth could be millions of years old People couldn’t imagine a force great enough to move the continents ...
... Why didn’t people believe in continental drift? People couldn’t imagine how the earth could be millions of years old People couldn’t imagine a force great enough to move the continents ...
Continental Drift
... • The north magnetic pole had clearly wandered over time. • More surprisingly, the path it seemed to have followed was different in Europe than in North America. • The two paths could be turned into one consistent path, but only by slowly closing the Atlantic Ocean as older and older rocks were comp ...
... • The north magnetic pole had clearly wandered over time. • More surprisingly, the path it seemed to have followed was different in Europe than in North America. • The two paths could be turned into one consistent path, but only by slowly closing the Atlantic Ocean as older and older rocks were comp ...
Chapter 22.4: Plate Tectonics
... 1. Isotope dating of rock reveals that rock near M.O.R. is younger than ocean floor far away from plate boundary. Old crust gets pushed away as new crust is made. The seafloor moves! ...
... 1. Isotope dating of rock reveals that rock near M.O.R. is younger than ocean floor far away from plate boundary. Old crust gets pushed away as new crust is made. The seafloor moves! ...
Test 2
... The oldest rocks of the continents are over 3 billion years old. The oldest rocks from the seafloor are only about _____ years old. (48) According to plate tectonic theory, the number of major crustal plates is about: (49) The place where seafloor spreading originates and where new crust is produced ...
... The oldest rocks of the continents are over 3 billion years old. The oldest rocks from the seafloor are only about _____ years old. (48) According to plate tectonic theory, the number of major crustal plates is about: (49) The place where seafloor spreading originates and where new crust is produced ...
Tectoinic Plates and Rock Cycle
... Mantle convection: Hotter mantle material rises beneath divergent boundaries, forces the cooler material to sink at subduction zones. So: moving plates, EQs, & volcanic eruptions are due to Earth’s loss of internal heat. ...
... Mantle convection: Hotter mantle material rises beneath divergent boundaries, forces the cooler material to sink at subduction zones. So: moving plates, EQs, & volcanic eruptions are due to Earth’s loss of internal heat. ...
Date: Block
... plates collide. It occurs at a convergent boundary. D. Tension: stress that occurs when forces act to stretch an object. They occur at divergent boundaries such as mid-ocean ridges. II. Folding A. Definition: the bending of rock layers because of stress in the Earth’s crust. B. Types of Folds 1. Ant ...
... plates collide. It occurs at a convergent boundary. D. Tension: stress that occurs when forces act to stretch an object. They occur at divergent boundaries such as mid-ocean ridges. II. Folding A. Definition: the bending of rock layers because of stress in the Earth’s crust. B. Types of Folds 1. Ant ...
Plate Tectonics
... Two plates move toward each other pushing together Subduction Zone- zone where one plate subsides ...
... Two plates move toward each other pushing together Subduction Zone- zone where one plate subsides ...
Plate tectonics
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός ""pertaining to building"") is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.