Tectonic Plates
Do we really know what is happening in our planet? How the Tectonic Plates effect our Earth? Guess what if I were you I would've browsed through my section of Tectonic Plates. But I should give you a little idea of the tectonic plates. There are 3 tectonic plate movements, they are called "Convergent Boundaries, Divergent Boundaries and the Transform Boundaries. Each of those plate boundaries are doing different movements, the convergent boundaries move toward each other, divergent boundaries move apart from each other, and transform boundaries move side by side (so imagine sliding opposite directions). Tectonic plates occur (their directions) because of convection currents.
Convergent Boundaries
When plates crash or crunch together are called "Convergent Boundaries". the Plates only move a few centimeters every year, so collisions are very slow and last millions of years. looking at the images below the oceanic plate has crashed into a continental plate. The convergent boundaries are the places where the plates crash and crunch together When the oceanic and continental plate collide the oceanic plate goes underneath the continental plate this creates a trench,the rock breaks and causes earthquakes As the oceanic plate pushes into the continental plate, the rocks get pushed into the hotter interior, and starts a process called “subduction”, the rocks melt and rise and this creates volcanic eruptions An example of this type of collision is on the plate of South America where the oceanic Plate is crashing into the continent of South America. The crash formed the Andes Mountains, the long string of volcanoes along the mountain crest, and the deep trench off the coast in the Pacific Ocean. There are 3 types of convergent boundaries: Oceanic-continental convergence; oceanic-oceanic convergence; and continental-continental convergence.
Subduction Zones: Subduction Zones are when Tectonic Plates slide underneath plate. The denser plate is the one that slips under the less dense plate; the younger plate is the less dense one. The tectonic plates grate against each other, which often causes earthquakes.
Subduction Zones: Subduction Zones are when Tectonic Plates slide underneath plate. The denser plate is the one that slips under the less dense plate; the younger plate is the less dense one. The tectonic plates grate against each other, which often causes earthquakes.
Divergent Boundaries
As The plates fall apart from each other. As the plates separate along the boundary, the block between the faults cracks and drops down into the soft, plastic interior (the asthenosphere). The sinking of the block forms a central valley called a rift. Magma (liquid rock) seeps upward to fill the cracks. In this way, new crust is formed along the boundary. Earthquakes occurs along the faults, and volcanoes form where the magma reaches the surface. Places where plates are coming apart are called divergent boundaries.When a divergent boundary crosses land the rift valley which forms. Divergent boundaries occur along spreading centers where plates are moving apart and new crust is created by magma pushing up from the mantle. Divergent plate boundaries are locations where plates are moving away from one another. This occurs above rising convection currents. The rising current pushes up on the bottom of the lithosphere.
Transform Boundaries
When plates slide across each other are called Transform Boundaries. When the plates on either of the transform boundary are sliding past each other and not tearing or crunching each other, transform boundaries lack the spectacular features found at convergent and divergent boundaries. Instead, transform boundaries are marked in some places by linear valThe final type of boundary is one where the two plates slide against each other in a sideways motion. These boundaries between plates is referred to as transform boundaries. As two plates slide past one another, in a transform boundary, neither plate is added to at the boundary, nor destroyed. along the boundary where rock has been ground up by the sliding. one of the most famous transform fault is called " San Andreas Fault".
Pangaea
How you ever heard of the Earth's seven continents being together like a full puzzle? Earth's continents were once together. In 1912 Alferd Wegener had a hypothesis that at one time the continents were part of the super continent called "Pangaea". Wegener had evidence that the rocks on the mountain ranges were the same ages as the rocks on different sides of continents, mountain ranges and landforms match on other sides of the continents. There was more evidence that fossils were matching and same with the plants, but they have been found in different sides of the ocean. Ancient Ice Age, striations caused by glaciers matched along the coasts of South America and South Africa.
Theory of continental drift: The theory that over time, the continents are drifting.
Theory of continental drift: The theory that over time, the continents are drifting.