introduction to plate tectonics
... separated by an ocean floor that is being subducted under one continent and that lacks a spreading axis to create new oceanic crust. As the sea floor is subducted, the ocean becomes narrower and narrower until the continents eventually collide and destroy or close the ocean basin. Eventually a mount ...
... separated by an ocean floor that is being subducted under one continent and that lacks a spreading axis to create new oceanic crust. As the sea floor is subducted, the ocean becomes narrower and narrower until the continents eventually collide and destroy or close the ocean basin. Eventually a mount ...
The Earth was extensively molten in the first 100 million years after
... The Earth was extensively molten in the first 100 million years after its formation. In that span of time, it acquired much of its present-day structure: the metallic core segregated and sank towards the center, while the mantle and crust separated at the surface. The primordial evolution of the man ...
... The Earth was extensively molten in the first 100 million years after its formation. In that span of time, it acquired much of its present-day structure: the metallic core segregated and sank towards the center, while the mantle and crust separated at the surface. The primordial evolution of the man ...
L3_Plate Tec_Deformation
... If the fastest spreading center, which is the East Pacific Rise, spreads at a rate of 18 centimeters per year, and it’s been spreading for 100 million years, how much new Pacific Ocean crust has been formed as a result? ...
... If the fastest spreading center, which is the East Pacific Rise, spreads at a rate of 18 centimeters per year, and it’s been spreading for 100 million years, how much new Pacific Ocean crust has been formed as a result? ...
Plate boundary notes - Fort Thomas Independent Schools
... The typical example of a divergent boundary is the mid-Atlantic ridge. As the plates spread apart a long (“crack”) forms and magma is able to flow to the surface. This magma forms new oceanic crust, volcanoes (and islands like Iceland) and shallow-focus earthquakes. These divergent boundaries are no ...
... The typical example of a divergent boundary is the mid-Atlantic ridge. As the plates spread apart a long (“crack”) forms and magma is able to flow to the surface. This magma forms new oceanic crust, volcanoes (and islands like Iceland) and shallow-focus earthquakes. These divergent boundaries are no ...
Chapter_15_Lecture
... • Plates are moving slowly • Largest plate is the Pacific plate • Plates are mostly beneath the ocean ...
... • Plates are moving slowly • Largest plate is the Pacific plate • Plates are mostly beneath the ocean ...
Graham Cracker Plate Tectonics Lab
... The Theory of Plate Tectonics states that the crust of the Earth is composed of seven major plates and numerous smaller plates. These plates “ride” on the hot plastic upper mantle called the asthenosphere. This theory also says that most of these plates are in motion, creating a variety of interacti ...
... The Theory of Plate Tectonics states that the crust of the Earth is composed of seven major plates and numerous smaller plates. These plates “ride” on the hot plastic upper mantle called the asthenosphere. This theory also says that most of these plates are in motion, creating a variety of interacti ...
Earth Structure
... sinks at trenches as it is drawn downward by gravity and inertia (eventually it reaches the athenosphere and melts into ...
... sinks at trenches as it is drawn downward by gravity and inertia (eventually it reaches the athenosphere and melts into ...
appendix 3
... • Text written in blue colour are instruction for the animator, these would not appear in the final animation • Text labeled in black colour would pop-up in animation • Green arrows indicate the flow of the phenomenon/processes ...
... • Text written in blue colour are instruction for the animator, these would not appear in the final animation • Text labeled in black colour would pop-up in animation • Green arrows indicate the flow of the phenomenon/processes ...
The Earth
... • Goal: To determine how plate tectonics cause earthquakes, volcanoes, and tsunamis. – Steps to reach goal: • 1. What are plate tectonics? • 2. What are earthquakes, volcanoes, and tsunamis? • 3. Where are they located? • 4. Can this information help us figure out how plate tectonics cause earthqua ...
... • Goal: To determine how plate tectonics cause earthquakes, volcanoes, and tsunamis. – Steps to reach goal: • 1. What are plate tectonics? • 2. What are earthquakes, volcanoes, and tsunamis? • 3. Where are they located? • 4. Can this information help us figure out how plate tectonics cause earthqua ...
The Reykjanes Peninsula Oblique Rift, a zone of crustal extension
... The structure of the plate boundaries in Iceland is relatively complex. Several of the plate boundary segments are oblique to the over-all plate velocity vector between the North America and Eurasia Plates. Oblique and immature plate boundaries are frequently characterized by complicated fault patte ...
... The structure of the plate boundaries in Iceland is relatively complex. Several of the plate boundary segments are oblique to the over-all plate velocity vector between the North America and Eurasia Plates. Oblique and immature plate boundaries are frequently characterized by complicated fault patte ...
Right Side Crust
... D. Plate Boundaries The theory of plate tectonics posits that the Earth’s lithosphere is broken into a finite number of jigsaw puzzle-like pieces, or plates, which more relative to one another over a plastically-deforming (but still solid) asthenosphere. The boundaries between plates are marked by a ...
... D. Plate Boundaries The theory of plate tectonics posits that the Earth’s lithosphere is broken into a finite number of jigsaw puzzle-like pieces, or plates, which more relative to one another over a plastically-deforming (but still solid) asthenosphere. The boundaries between plates are marked by a ...
Topic Seven - Science - Miami
... OBJECTIVES Classify the movement of plates by identifying the events/feature that are caused by them Compare and contrast divergent and convergent movements Identify the agents of slow and rapid changes to Earth’s surface Discuss the limitations and benefits of using models in the study of p ...
... OBJECTIVES Classify the movement of plates by identifying the events/feature that are caused by them Compare and contrast divergent and convergent movements Identify the agents of slow and rapid changes to Earth’s surface Discuss the limitations and benefits of using models in the study of p ...
Geography and Society – First Discussions
... o Summarize the major points of the Theory of Plate Tectonics. o Explain how data collected on the magnetism, depth, and the age of oceanic crust support the Theory of Plate Tectonics. o Explain how the distribution of earthquakes, volcanoes, and the Hawaiian Island chain relate to plate tectonics. ...
... o Summarize the major points of the Theory of Plate Tectonics. o Explain how data collected on the magnetism, depth, and the age of oceanic crust support the Theory of Plate Tectonics. o Explain how the distribution of earthquakes, volcanoes, and the Hawaiian Island chain relate to plate tectonics. ...
Inside Earth: Layers of the Earth
... Earth is a restless planet. Heat in the Earth’s interior causes giant plates of crust to move around on the surface. The crashing and smashing of these plates leads to nearly all of the geological activity we see. Plate collisions bring us volcanoes and earthquakes, mountain ranges, and many resourc ...
... Earth is a restless planet. Heat in the Earth’s interior causes giant plates of crust to move around on the surface. The crashing and smashing of these plates leads to nearly all of the geological activity we see. Plate collisions bring us volcanoes and earthquakes, mountain ranges, and many resourc ...
Plotting Ring of Fire
... exercise today. This was the data that originally caused Wegener to develop his idea of continental drift, which was the grand daddy of modern plate tectonic theory. Ring of Fire: The Pacific Ring of Fire is an area where large numbers of earthquakes and volcanic eruptions occur in the basin of the ...
... exercise today. This was the data that originally caused Wegener to develop his idea of continental drift, which was the grand daddy of modern plate tectonic theory. Ring of Fire: The Pacific Ring of Fire is an area where large numbers of earthquakes and volcanic eruptions occur in the basin of the ...
Earth and Space Science Part 3
... when waves break on a beach; water carries sand and other sediments as it flows back into the ocean. Erosion along a shore causes beaches to become smaller. ...
... when waves break on a beach; water carries sand and other sediments as it flows back into the ocean. Erosion along a shore causes beaches to become smaller. ...
Plate Tectonics: Have the Continents Really Moved Apart?
... (3) plates are ‘pushed’ slowly apart along mid-ocean ridges by slow injection of magma into vertical cracks. Each of these mechanisms (alone or together) cannot overcome the viscous drag at the base of the plates, and cannot explain how the difference in elevation developed, or how the plate boundar ...
... (3) plates are ‘pushed’ slowly apart along mid-ocean ridges by slow injection of magma into vertical cracks. Each of these mechanisms (alone or together) cannot overcome the viscous drag at the base of the plates, and cannot explain how the difference in elevation developed, or how the plate boundar ...
GG 101, Spring 2006 Name_________________________ Exam 2
... 2. How could you use P and S seismic waves to find a chamber of molten magma in the earth’s crust? (5 points) Because P-waves travel more slowly through liquids than through solids and S-waves are absorbed by liquids, one could generate seismic waves of both types and search for areas below the surf ...
... 2. How could you use P and S seismic waves to find a chamber of molten magma in the earth’s crust? (5 points) Because P-waves travel more slowly through liquids than through solids and S-waves are absorbed by liquids, one could generate seismic waves of both types and search for areas below the surf ...
EPS 50 “Planet Earth” – Review for Midterm 1 (Fall 2010)
... composition of the whole Earth and crust? What processes have given rise to these differences? ...
... composition of the whole Earth and crust? What processes have given rise to these differences? ...
Plate Tectonics Section 1 Wegener`s Hypothesis continental drift
... geomagnetic reversal time scale. • Because the same pattern appears in rocks of the same ages on both land and the sea floor, scientists agreed that the magnetic patterns showed change over time. • The idea of sea-floor spreading provides a way for the continents to move over the Earth’s surface. • ...
... geomagnetic reversal time scale. • Because the same pattern appears in rocks of the same ages on both land and the sea floor, scientists agreed that the magnetic patterns showed change over time. • The idea of sea-floor spreading provides a way for the continents to move over the Earth’s surface. • ...
Chapter 22.1: Earth`s Structure
... How do we know about Earth’s interior if we can’t see it? - Interpret seismic (earthquake) waves - Waves travel at different speeds in different mediums and materials ...
... How do we know about Earth’s interior if we can’t see it? - Interpret seismic (earthquake) waves - Waves travel at different speeds in different mediums and materials ...
Plate Tetonics
... and the Tibetan Plateau to their present heights. Most of this growth occurred during the past 10 million years. ...
... and the Tibetan Plateau to their present heights. Most of this growth occurred during the past 10 million years. ...
476356_6341777079800..
... • Outer core is liquid and composed of an iron-nickel alloy. Convective flow of this fluid generates much of the Earth’s magnetic field. • Inner core is solid iron-nickel alloy. It is hotter than the outer core, but the intense pressure keeps it solid. ...
... • Outer core is liquid and composed of an iron-nickel alloy. Convective flow of this fluid generates much of the Earth’s magnetic field. • Inner core is solid iron-nickel alloy. It is hotter than the outer core, but the intense pressure keeps it solid. ...
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.