Plate Tectonics and Continental Drift
... (2) both ____________ sea floor (3) entirely ______________ rock ...
... (2) both ____________ sea floor (3) entirely ______________ rock ...
Document
... When two plates move apart and magma surfaces forming NEW crust (usually oceanic) • continental rift zones (landmass splits into two or more segments) • mid-ocean ridges (sea-floor is elevated) ...
... When two plates move apart and magma surfaces forming NEW crust (usually oceanic) • continental rift zones (landmass splits into two or more segments) • mid-ocean ridges (sea-floor is elevated) ...
The Dynamic Crust
... from cooling lava, that comprise the ocean floor show that the youngest rocks are near the mid-ocean ridges. The farther you travel from the ridges, the older the basalt gets. Rocks also provide evidence that the Earth’s poles have reversed their ...
... from cooling lava, that comprise the ocean floor show that the youngest rocks are near the mid-ocean ridges. The farther you travel from the ridges, the older the basalt gets. Rocks also provide evidence that the Earth’s poles have reversed their ...
Geological maps
... • Mid-ocean ridge = the high range of mountains that runs under the oceans and is the site of “spreading” • Seamount chain = line of undersea peaks that extends from a “hot spot” in the mantle (only one end of the chain can be volcanically active and there is no associated “trench”) ...
... • Mid-ocean ridge = the high range of mountains that runs under the oceans and is the site of “spreading” • Seamount chain = line of undersea peaks that extends from a “hot spot” in the mantle (only one end of the chain can be volcanically active and there is no associated “trench”) ...
Plate
... Ch. 3: Igneous Rocks and Processes Earlier this quarter you read most of chapters 3 and 4, but we did not cover the origin of magmas at that point. The sections below will help you understand how magmas form. Melting Rocks and Crystallizing Magma (p. 72) The Creation of Magma (p. 73) When rocks melt ...
... Ch. 3: Igneous Rocks and Processes Earlier this quarter you read most of chapters 3 and 4, but we did not cover the origin of magmas at that point. The sections below will help you understand how magmas form. Melting Rocks and Crystallizing Magma (p. 72) The Creation of Magma (p. 73) When rocks melt ...
Oceanography Chapter 11
... separate plates. The plates are rigid and float on the asthenosphere. At a spreading or divergent boundary, two plates are moving apart. As this happens, the crust pulls apart and forms valleys. Magma flows up through the rift valleys creating new crust and widening the seafloor. Mid-ocean ridge ...
... separate plates. The plates are rigid and float on the asthenosphere. At a spreading or divergent boundary, two plates are moving apart. As this happens, the crust pulls apart and forms valleys. Magma flows up through the rift valleys creating new crust and widening the seafloor. Mid-ocean ridge ...
File
... • 3. Movement happens because Earth’s makeup – a. Lithosphere • Crust and rigid upper mantle • These are the ‘plates’, 7 large pieces & several small pieces (tectonic plates) ...
... • 3. Movement happens because Earth’s makeup – a. Lithosphere • Crust and rigid upper mantle • These are the ‘plates’, 7 large pieces & several small pieces (tectonic plates) ...
3 Cool , ρ = 3400 kg m
... 2. Transform faults and fracture zones (adjacent transform faults are parallel). 3. Continuous plate boundaries 4. Volcanic Island chains - plates moving over fixed mantle plume (melt source) 5. Topography variations consistent with aging plates. ...
... 2. Transform faults and fracture zones (adjacent transform faults are parallel). 3. Continuous plate boundaries 4. Volcanic Island chains - plates moving over fixed mantle plume (melt source) 5. Topography variations consistent with aging plates. ...
Quiz 1
... 16. The Hawaiian Islands are a result of the Pacific Plate passing over a hot spot. T 17. As rocks cool, they become denser and sink. T 18. A hypothesis is a scientific theory that has been tested. F ...
... 16. The Hawaiian Islands are a result of the Pacific Plate passing over a hot spot. T 17. As rocks cool, they become denser and sink. T 18. A hypothesis is a scientific theory that has been tested. F ...
Earth`s Interior PPT - Lyndhurst School District
... • The uppermost part of the mantle is very similar to the crust. The uppermost part of the mantle and the crust together form a rigid layer called the lithosphere • The asthenosphere is below the lithosphere and is hotter, under more pressure, and is flexible • The asthenosphere's texture can be co ...
... • The uppermost part of the mantle is very similar to the crust. The uppermost part of the mantle and the crust together form a rigid layer called the lithosphere • The asthenosphere is below the lithosphere and is hotter, under more pressure, and is flexible • The asthenosphere's texture can be co ...
Lauren Winner G355 Lab Write-up May 18, 2010 Laboratory Title
... to study the ocean floor, they discovered a surprising pattern. Measurements of magnetic variations showed that, in many areas, alternating bands of rocks recording normal and reversed polarity were arranged symmetrically about mid-ocean ridges (Fig. 5). In 1963, F. Vine and D.H. Matthews reasoned t ...
... to study the ocean floor, they discovered a surprising pattern. Measurements of magnetic variations showed that, in many areas, alternating bands of rocks recording normal and reversed polarity were arranged symmetrically about mid-ocean ridges (Fig. 5). In 1963, F. Vine and D.H. Matthews reasoned t ...
Earth`s Structure
... plates. Where they meet is called a plate boundary. Convection currents in the mantle move these tectonic plates. In some locations the tectonic plates are moving towards each other, in others they are moving away from each other and in ...
... plates. Where they meet is called a plate boundary. Convection currents in the mantle move these tectonic plates. In some locations the tectonic plates are moving towards each other, in others they are moving away from each other and in ...
Plate Tectonics Earth`s Interior I. Inside Earth a. Earth`s
... 2. Divergent boundaries also occur on land. 3. When a divergent boundary develops on land, two of Earth’s plates slide apart. A deep valley called a rift valley forms along the divergent boundary. ii. Convergent Boundaries – the place where two plates come together, or converge. 1. When two plates c ...
... 2. Divergent boundaries also occur on land. 3. When a divergent boundary develops on land, two of Earth’s plates slide apart. A deep valley called a rift valley forms along the divergent boundary. ii. Convergent Boundaries – the place where two plates come together, or converge. 1. When two plates c ...
Chapter 11 What about continental drift?
... Plate tectonics The general principles of plate tectonic theory may be stated as follows.3 The Earth’s surface consists of a mosaic of rigid plates, each moving relative to adjacent plates. Deformation occurs at the edges of the plates by three types of horizontal motion: extension (or rifting, movi ...
... Plate tectonics The general principles of plate tectonic theory may be stated as follows.3 The Earth’s surface consists of a mosaic of rigid plates, each moving relative to adjacent plates. Deformation occurs at the edges of the plates by three types of horizontal motion: extension (or rifting, movi ...
CP EnvSci Geosphere Review Name ______KEY______ Period
... _g____6. Caused primarily from transform boundaries __i___7. Term given to the process when one plate is pushed under another _c___8. Stationary pools of magma (not at plate boundaries) _h____9. Series of waves caused by convergent or divergent ...
... _g____6. Caused primarily from transform boundaries __i___7. Term given to the process when one plate is pushed under another _c___8. Stationary pools of magma (not at plate boundaries) _h____9. Series of waves caused by convergent or divergent ...
_____, meaning *all land,* is the name for the great landmass that
... equator today were once closer to • Matching early mammal fossils the South Pole in the distant past. are found in South America and Africa. ...
... equator today were once closer to • Matching early mammal fossils the South Pole in the distant past. are found in South America and Africa. ...
Inside the Earth
... • Friction, when denser core material sinks • Decay of radioactive elements, mostly uranium and thorium according to physicists. ...
... • Friction, when denser core material sinks • Decay of radioactive elements, mostly uranium and thorium according to physicists. ...
Plate Tectonics, Earthquakes, and Volcanoes Study Guide
... 17.Suppose the arrows in the diagram represent patterns of convection in Earth’s mantle. Which type of plate boundary is most likely to form along the region labeled “A” 18.What is happening at the region marked “B” on the diagram? ...
... 17.Suppose the arrows in the diagram represent patterns of convection in Earth’s mantle. Which type of plate boundary is most likely to form along the region labeled “A” 18.What is happening at the region marked “B” on the diagram? ...
Convergent Boundary - Plain Local Schools
... - Transform fault boundary Convergent Boundary – 2 Plate meet head on ...
... - Transform fault boundary Convergent Boundary – 2 Plate meet head on ...
Semester 1 Unit 2 Review
... List the different types of plate boundaries. i. For each type of boundary explain the direction of plate movement ...
... List the different types of plate boundaries. i. For each type of boundary explain the direction of plate movement ...
Tectonic Plates - cloudfront.net
... Tip of the Iceberg If you could look at a tectonic plate from the side, you would see that mountain ranges are like the tips of icebergs—there is much more material below the surface than above. Mountain ranges that occur in continental crust have very deep roots relative to their height. For exampl ...
... Tip of the Iceberg If you could look at a tectonic plate from the side, you would see that mountain ranges are like the tips of icebergs—there is much more material below the surface than above. Mountain ranges that occur in continental crust have very deep roots relative to their height. For exampl ...
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.