The Theory Of Plate Tectonics

One evidence of this theory is molten material. Molten Material is magma erupting from mid-ocean ridges. Alvin the submarine found weird rocks shaped like pillows or toothpaste. This tells us this magma cools quickly underwater. Another type of evidence are magnetic stripes. Magnetic stripes are patterns in the ocean floor to prove Earth’s magnetic field has reversed itself in history. Scientist also looked at the “magnetic memory” of the rocks. Scientist drilled pipes through water to drill holes into the ocean floor. Scientists discovered that the older rocks were further away and younger rocks were closer. Those were the three types of evidence that scientist used to support the theory of Sea Floor Spreading.

The theory of plate tectonics was first developed by Alfred Wegener. He concluded that the continents seem to have a similar shape and could potentially fit together. This suggested that they were at one time joined together as part of 2 super continents called Gondwanaland and Laurasia was in the north. This theory was said to be proven by the discovery of fossilised remains of a mesosaurus that were found on the coasts of Brazil and Gabon. Sea floor spreading is another theory that supports the idea of plate tectonics; this theory discovered that rock is being formed under the ocean as a new sea floor. Sea floor spreading was shown in the Atlantic, where it is believed the Eurasian and North American plates are moving apart on a

The new volcanic material welling up into the void, which forms a ribbon of new materials and breaks down its center gradually, when the plates move apart from the axis of the mid-oceanic ridge system. Therefore, every separating plate accretes one half a ribbon of new lithosphere, and, thus, a new surface is added (Pitman, W.C, 2007). The process is continuous, and separation is always happening at the

The three theories all have many similarities, but only a few stand out specifically. They all involve tectonic plates and use the mantle in the theories. Seafloor spreading occurs because magma erupts and the old floor is always being subducted. Continental drift and plate tectonics

These plates, along with several smaller ones, are called the lithospheric plates, because they are part of the lithosphere, which is the outermost part of the Earth's shell. . The plate boundaries can be three different types: divergent, transform or subduction. Divergent boundaries occur when the plates are moving away from each other. Transform boundaries are where the plates slide against each other with a back and forth motion. Subduction boundaries occur when an oceanic plate moves under a continental plate. This movement causes volcanic activity and earthquakes. (This boundary is also called convergent.) This activity is always happening, because the plates are constantly in

The plate tectonics theory is the theory that the outer rigid layer of the earth is divided into several plates that move around across the earth's surface. There are many topics that support this theory, but I think that continental drift and seismic activity help support it the best. Theories can change over time because people get new understandings of things as time goes by, new knowledge is gained with new technology, and new discoveries can be made.

This is a divergent boundary that has continental plates are made out of granite. The plates move apart and make a giant dip in the crust of the Earth. As the plates move apart they form a Rift Valley in the crust and keeps getting bigger, but this takes time.

The theory of plate tectonics evolved out of the theory of continental drift. Alfred Wegener originally proposed the theory that continents move over time in 1912 after observing that many coastlines on opposite sides of the ocean appeared to match up like puzzle pieces. He formed the theory of continental drift based on evidence, such as the fact that fossils of the same species of plant or land animals are found across oceans, on different continents. Unfortunately, Wegener's theory was largely ignored in part because it did not explain how or why the continents moved. Over the next 50 years, however, scientists continued to collect evidence that suggested he may have been right. For example,

Convergent boundaries (Destructive) (or active margins) occur wherever 2 plates slide toward one another to make either a geological process zone (one plate moving beneath the other) or a continental collision.

Plate tectonics is the theory of which has developed since the 1590's. According to World Atlas there are nine major plates. Each plate moves 2-5 centimetres annually. Over the

Plate tectonics is the theory that explains how the Earth moves and deforms. Plate tectonics was first developed in the late 1960's and has created a new view on how we think about the Earth. Ever since this theory was preconceived geologists have had to reevaluate almost every aspect of geology.

In conclusion, plate tectonics is a large subject broken down into smaller subjects. The smaller subject I chose was plate boundaries. The three different boundaries are the divergent boundaries, the convergent boundaries, and the transform boundaries. All these boundaries move in different ways, and they all have different outcomes on the surface, and sometimes below the surface, of Earth. These boundaries and their outcomes are the reason Earth’s plates are shaped and positioned how they are

The plate tectonic theory states that rigid plates slowly ride on the molten mantle. The boundaries between the plates are known to serve as an important mineral resource. Three types of tectonic plate exist: convergent, divergent and transform boundaries. A convergent boundary represents two plates moving towards each other mostly forming a subduction. When two plates move away from each other, a divergent boundary is formed. In transform boundaries, the plates move laterally past each other (Mission, 2016).

Unlike the other three terrestrial planets, Earth’s crust, also called the Lithosphere, is broken into many large plates. These plates are constantly in motion, “floating” on top of the mantle, a layer of molten rock that lays just miles under the lithosphere. Even though the plates are constantly in motion, there is only a few centimeters of change every year. The seven major tectonic plates are known as the African Plate, the Antarctic Plate, the Eurasian Plate, the Indo-Australian Plate, the North American Plate, the Pacific Plate, and the South American Plate. Along with the seven major plates, there are several smaller plates. The surface of the Earth is constantly changing due to the movement of these plates. There are four different types of plate boundaries. Plate boundaries occur where the edges of two tectonic plates interact with each other as the plates move. Divergent boundaries occur when two plates move away from one another. Oceanic crust is created at divergent boundaries when magma from the mantle reaches the surface and hardens. Convergent boundaries occur when two plates move toward each other, causing mountains and volcanoes to form. Subduction boundaries occur when an oceanic plate moves under a continental plate, resulting in violent earthquakes and volcanoes. Transform boundaries occur when two plates slide against each other. Transform boundaries result in the strongest earthquakes and fault

There are two more ways that the plates do and that is decreasing and melting in the earth’s mantle and separating then create a new earth mantle. Many of these people just believe that plates just float or go wherever they want to go.