Fact Sheet - SharpSchool
... stated that Pangaea started breaking up about 200 million years ago and the pieces began moving into their current location. The big reason that people didn’t believe this theory was because there because Wegner had no evidence to prove what force caused the continents to move and Wegner did try to ...
... stated that Pangaea started breaking up about 200 million years ago and the pieces began moving into their current location. The big reason that people didn’t believe this theory was because there because Wegner had no evidence to prove what force caused the continents to move and Wegner did try to ...
Convergent Boundaries Places where plates crash or
... has crashed into a continental plate. The edge of the continental plate in the drawing has folded into a huge mountain range, while the edge of the oceanic plate has bent downward and dug deep into the Earth. A trench has formed at the bend. All that folding and bending makes rock in both plates bre ...
... has crashed into a continental plate. The edge of the continental plate in the drawing has folded into a huge mountain range, while the edge of the oceanic plate has bent downward and dug deep into the Earth. A trench has formed at the bend. All that folding and bending makes rock in both plates bre ...
What are the four - Piers Wikispaces
... The continents of Africa and South America look like they fit together. Fossils of the same animals on widely separated continents. Glaciers on the equator and tropical swamps in the arctic. Mountain ranges that connect on both sides of the ocean ...
... The continents of Africa and South America look like they fit together. Fossils of the same animals on widely separated continents. Glaciers on the equator and tropical swamps in the arctic. Mountain ranges that connect on both sides of the ocean ...
2nd Nine Weeks Study Guide
... 18.Holes drilled several kilometers into Earth’s crust provide direct evidence about Earth’s interior in the form of _________________________. 19.A place where two plates slip past each other, moving in opposite directions, is known as a ____________________ boundary. 20.What are four pieces of evi ...
... 18.Holes drilled several kilometers into Earth’s crust provide direct evidence about Earth’s interior in the form of _________________________. 19.A place where two plates slip past each other, moving in opposite directions, is known as a ____________________ boundary. 20.What are four pieces of evi ...
I-6 Dynamic Planet Notes
... relative to one another. Some of the plates have continents on them. The continents move relative to one another. ...
... relative to one another. Some of the plates have continents on them. The continents move relative to one another. ...
Plate tectonics, continental drift, plate boundaries
... causes an Earthquake. During Earthquakes faults (big cracks in the crust) occur because of the pressure of the moving crust. A great amount of Earthquakes happen a year, though only the big ones are considered disasters. San Francisco Earthquake ...
... causes an Earthquake. During Earthquakes faults (big cracks in the crust) occur because of the pressure of the moving crust. A great amount of Earthquakes happen a year, though only the big ones are considered disasters. San Francisco Earthquake ...
Plate Tectonics PowerPoint
... continental lithosphere • Oceanic lithosphere heats and melts forming magma • The magma rises forming volcanoes • E.g. The Andes ...
... continental lithosphere • Oceanic lithosphere heats and melts forming magma • The magma rises forming volcanoes • E.g. The Andes ...
EARTHQUAKES
... An earthquake occurs when the crust of the earth trembles or shakes. Where the earth’s tectonic plates collide, huge amounts of energy push rock against rock. In some places the plates slide over each other little by little, but in other places they get stuck. For years, and even decades, the pressu ...
... An earthquake occurs when the crust of the earth trembles or shakes. Where the earth’s tectonic plates collide, huge amounts of energy push rock against rock. In some places the plates slide over each other little by little, but in other places they get stuck. For years, and even decades, the pressu ...
INTERIOR STRUCTURE OF THE EARTH
... understand how the structure of the Earth allows for plate tectonic activity. When we familiar with the crust of the Earth shown in the first diagram. The distinction between the crust and mantle is based on chemical differences between the two regions. The transition between the crust and mantle is ...
... understand how the structure of the Earth allows for plate tectonic activity. When we familiar with the crust of the Earth shown in the first diagram. The distinction between the crust and mantle is based on chemical differences between the two regions. The transition between the crust and mantle is ...
Types of Plate Boundaries Submitted by WWW.ASSIGNMENTPOINT
... push it seaward toward the subduction zone—Japan is a modern‐day example. The rifting may be caused by a mantle plume that has come near to the surface and is spreading out, creating convection currents that stretch the crust to the point of breakage. The locations of oceanic trenches shift gradual ...
... push it seaward toward the subduction zone—Japan is a modern‐day example. The rifting may be caused by a mantle plume that has come near to the surface and is spreading out, creating convection currents that stretch the crust to the point of breakage. The locations of oceanic trenches shift gradual ...
Plate Tectonics: The Grand Unifying Theory of Geology
... Transform Plate Boundaries – No Net Loss or Gain of Lithosphere Transforms indicate where plates slide past each other; Most are fairly short Most occur as fracture zones adjacent to mid-ocean ridges Oceanic transforms were first properly described recognized by J.T. Wilson ...
... Transform Plate Boundaries – No Net Loss or Gain of Lithosphere Transforms indicate where plates slide past each other; Most are fairly short Most occur as fracture zones adjacent to mid-ocean ridges Oceanic transforms were first properly described recognized by J.T. Wilson ...
The location of volcanoes
... (b) Volcanoes also occur in broad belts. Found along the edges of continents e.g. West coast of South America. Can be found just offshore of continental landmasses, e.g. western Pacific Ocean. Anomalies include cluster of volcanoes in the mid-Pacific around Hawaii and band of volcanoes inland in eas ...
... (b) Volcanoes also occur in broad belts. Found along the edges of continents e.g. West coast of South America. Can be found just offshore of continental landmasses, e.g. western Pacific Ocean. Anomalies include cluster of volcanoes in the mid-Pacific around Hawaii and band of volcanoes inland in eas ...
Features of Plate Tectonics
... collides with a continental plate, the heavy oceanic plate will dive under the lighter continental plate in an event known as subduction. A deep underwater valley, called a trench, forms where the plates make contact. As the edge of a tectonic plate subducts, it pulls the rest of the plate with it. ...
... collides with a continental plate, the heavy oceanic plate will dive under the lighter continental plate in an event known as subduction. A deep underwater valley, called a trench, forms where the plates make contact. As the edge of a tectonic plate subducts, it pulls the rest of the plate with it. ...
Journey to the Center of Earth
... Collision between two oceanic plates can result in the process when one plate bends and sinks beneath the other to produce deep oceanic trenches. (Mariana Trench) • Oceanic–Continental Subduction: When an oceanic plate and a continental plate converge, the denser oceanic plate is subducted beneath t ...
... Collision between two oceanic plates can result in the process when one plate bends and sinks beneath the other to produce deep oceanic trenches. (Mariana Trench) • Oceanic–Continental Subduction: When an oceanic plate and a continental plate converge, the denser oceanic plate is subducted beneath t ...
Oceanography Test #1
... 35. Wegener’s theory of Continental Drift was instantly accepted by his peers. 36. The Mid-Atlantic Ridge is characterized by a prominent valley that runs along its crest. 37. As we move away from an ocean ridge, seismic refraction shows thicker and thicker sediment layers. 38. One reason Wegener th ...
... 35. Wegener’s theory of Continental Drift was instantly accepted by his peers. 36. The Mid-Atlantic Ridge is characterized by a prominent valley that runs along its crest. 37. As we move away from an ocean ridge, seismic refraction shows thicker and thicker sediment layers. 38. One reason Wegener th ...
The Geosphere
... Earthquakes Fault- break in the Earth’s crust where blocks of Earth slide by each other. Earthquakes- vibrations of the Earth’s crust that are caused by slippage along a ...
... Earthquakes Fault- break in the Earth’s crust where blocks of Earth slide by each other. Earthquakes- vibrations of the Earth’s crust that are caused by slippage along a ...
ES_Chapter 9_PPT
... the crest of ridges represent divergent plate boundaries. • Rift valleys are deep faulted structures found along the axes of divergent plate boundaries. They can develop on the seafloor or on land. • Seafloor spreading produces new oceanic lithosphere. ...
... the crest of ridges represent divergent plate boundaries. • Rift valleys are deep faulted structures found along the axes of divergent plate boundaries. They can develop on the seafloor or on land. • Seafloor spreading produces new oceanic lithosphere. ...
Social Studies
... The theory that earth’s surface is divided into several major, slow-moving plates or pieces. 1. Layers of the Earth- Like an Apple or a Peach ...
... The theory that earth’s surface is divided into several major, slow-moving plates or pieces. 1. Layers of the Earth- Like an Apple or a Peach ...
Glossopteris flora continental drift Pangaea magnetism
... The theory that the seafloor moves away from spreading ridges and is eventually consumed at subduction zones. ...
... The theory that the seafloor moves away from spreading ridges and is eventually consumed at subduction zones. ...
Tectonics of Venus
... • Large flood basalt volcanic event 700 Ma • Greenhouse gases expelled • Driving force for surface topography is differential between surface temp and mantle temp ...
... • Large flood basalt volcanic event 700 Ma • Greenhouse gases expelled • Driving force for surface topography is differential between surface temp and mantle temp ...
Continental Formation - Department of Geosciences
... Key issues to remember • Oceanic crust is mafic/basaltic and young older oceanic materials are subducted • Continental crust has the average of a granitoid, appears unsubductable • Continental masses grow over time, some continents have older cratons in their cores ...
... Key issues to remember • Oceanic crust is mafic/basaltic and young older oceanic materials are subducted • Continental crust has the average of a granitoid, appears unsubductable • Continental masses grow over time, some continents have older cratons in their cores ...
File
... Late 1800’s Alfred Wegner proposed the idea of continental drift (What is drift? Cars) ...
... Late 1800’s Alfred Wegner proposed the idea of continental drift (What is drift? Cars) ...
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.