Plate Tectonics

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by ElijahKinnavong
Last updated 1 year ago

Earth Sciences

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Earth’s tectonic plates theory deals with the dynamics of Earth’s outer shell, (the lithosphere) that revolutionized Earth sciences by providing a uniform context for understanding mountain-building processes, volcanoes, and earthquakes, as well as understanding the evolution of Earth’s surface and reconstructing its past continental and oceanic configurations.

What are plate tectonics?Who/When proposed the idea?Where were plate tectonicsin the past and today?

The plate tectonic theory was proposed by Alfred Wegener in 1915. Alfred had the theory of "continetial drift" when he saw that Africa and South Africa fitted like puzzle pieces. He had realised that the Earth's continents moved through time. Geologists thought that the features were that the Earth was cycling through heating and cooling. As years past, lots more evidence had been discovered about continential motion, espsically in the Alps. In the 1960's a world-wide array of seismometres were installed to monitor nuclear testing, and the seismometres revealed a geological phenomenon. The seismometres showed that earthquakes, volcanoes, and other geologic features for the most part aligned a;ong distinct belts around the Earth. These belts also deifined the edges of the tectonic plates.

When all the continents were together, the land was called Pangea. Then, all the continents slowly drifted away into two continents. Laurasia and Gondwanaland. The tectonic plates would only move 6cm every year.

This is Pangea


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