Plates tectonics
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The document discusses plate tectonics and how it has shaped the earth over hundreds of millions of years. Plate tectonics refers to rigid tectonic plates that make up the lithosphere and float on top of the earth's mantle. These plates slowly move over time due to convection currents in the mantle, occasionally colliding and causing earthquakes, volcanoes, and mountain building when they do. The movement of tectonic plates has resulted in the formation of continents and the breakup of supercontinents like Pangea over hundreds of millions of years.
Plates tectonics
- 1. Sofía Tovar Figueroa Listening and Speaking V
- 4. Over 220 million years ago the earth was formed by a unique structure called "Pangea" , Pangea was the supercontinent that existed at the end of the Paleozoic and Mesozoic that grouped most of the land surface of the planet. It was formed by the movement of plates tectonic, some 300 million years ago joined all previous continents into one, then, about 200 million years ago, began to fracture and disintegrate up, it has been fragmented to form the continents known in the XXI century.
- 5. WHAT ARE PLATES TECTONICS? structure Igneous rock
- 6. the plates tectonics are structures that make up the earth. A plate is a rigid block of solid rock that forms the Earth's surface (lithosphere), this plate floats on molten igneous rocks that are part of the Center of the Earth. tectonic plates do not sink, as compared with metals that form the core of the earth are relatively light. The plate material is quartz and silicates primarily.
- 7. MATERIALS
- 8. MOVEMENT
- 9. The plates are moved relative to each other driven movements of the rock layers which are heated inside the planet. This movement produced fractures that resulted in the formation of the continents. Plates move on average, between 2 and 3 inches in a year, this may sound slow. But over millions of years, these small plate movements change the face of the earth.
- 10. HOW FAST DO PLATES MOVE? 2 and 3 inches
- 11. WHAT HAPPENS WHEN PLATES COLLIDE? Products of the movement of the plates are earthquakes and tsunamis. These phenomena occur when plates collide violently, releasing large amounts of energy and produce strong movements in the earth's surface or in the sea. As a result of internal movement of the earth plates collide. This impact causes that the lithosphere create a mountain range.
- 13. Collision has raised the terrain of Mount Everest
- 15. THE MOVEMENTS OF THE PLATES CREATE THREE TYPES OF BOUNDARIES Divergent boundary- when plates are moving apart and new crust is created by liquid rock pushing up from the mantle Convergent boundaries -When the plates are moving relative to each other and sometimes when one plate sinks or is adapted under another Transform boundary -When plates are moving pass each other and cause friction.
- 17. The Knowledge of the displacements, scratches, shocks and separations of the plates have been used to explain many geological phenomena such as (earthquakes, volcanism, mountain building and continental drift)
- 18. The major plates are: Pacific, the Americas, Eurasia, India, Africa and Antarctica. Small plates are :Nasca, Cocos, Philippines, Caribbean, Arabia, Somalia and Juan de Fuca
- 19. Colombia is located in The South American Plate The Nazca plate and the Caribbean plate