Plate Tectonic Theory and its Role in continental displacement - MAINS QUESTION - DAILY CURRENT AFFAIR QUESTIONS AND ANSWERS

Monday, September 14, 2020

Plate Tectonic Theory and its Role in continental displacement

Plate tectonics is a scientific theory. Which provides an explanation of the large-scale movements occurring on the Earth's terrain. It also attempts to explain the construction of surface relief in the form of continents, oceans and mountains, and the geographical distribution of events such as earthquakes and volcanoes. In plate tectonics, the word tectonics is derived from the Greek language, which is related to construction. The term plate was first used by Canadian geologist Wilson (Wilson) and the term plate tectonics was first used by Morgan. This theory evolved from a concept called continental displacement envisaged in the first decade of the twentieth century when new evidence was discovered in the 1960s that strengthened the concept of continents being dynamic rather than static. The most important of these proofs. Evidence pertaining to puerperal that confirmed the Sagar Nital diffusion. The discovery of the Sagar Mittal variance by Harry Hayes is believed to be the beginning of this theory and Wilson, Morgan, McKenzie, Oliver, Parker, etc.
Scholars contributed to its promotion by providing evidence in its favor.
According to this theory, the Earth's top is about 80 to 100 km. The thick layer called the lithosphere and consisting of the crust and the upper part of the crust is broken into several pieces called plates. These plates are floating on the semipermeable layer of the asthenosphere at the bottom and are typically moving at a speed of about 10–40 mm / yr.
However, some of them have a speed of 160 mm/year. 

What is Seafloor spreading ?

It is a geological concept in which it is designed that the terrain is supported by this cutaneous axis, broken by plates with support from sea lanes. And its pieces move away from each other and magma from the bottom up here forms a new terrain (plate).

What is continental drift theory?

Continental drift theory is called the moving of the continents of the earth in relation to each other. If seen in geographical epochs of millions of years, it seems that the continents and their seas are lying on the floor and some- The concept of flowing continents was first revealed in 1596 by Dutch scientist Abraham Ortelius, But in 1912 the German geologist Alfred Wegner developed it from independent study.  The theory developed was able to explain the movement of continents more than continental flow. According to the theory of plate tectonics, the lithosphere is divided into several rigid plates. These plates are floating over the debility located below the lithosphere.

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