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Tectonic plates are large plates of rock that make up the foundation of the Earth's crust and the shape of the continents. The tectonic plates comprise the bottom of the crust and the top of the Earth's mantle.There are ten major plates on Earth and many more minor ones.ectonic plates are large plates of rock that make up the foundation of the Earth's crust and the shape of the continents. The tectonic plates comprise the bottom of the crust and the top of the Earth's mantle. There are ten major plates on Earth and many more minor ones.
The major tectonic plates on Earth are the Pacific Plate, the Indo-Australian Plate, the North American Plate, the Eurasian Plate, the African Plate, the South American Plate â¦ and the Antarctic Plate.he main 7 tectonic plates around the world are: the Eurasian plate; African plate; Indo-Australian plate; Pacific plate; North American plate; South American plate; and the A â¦ ntarctic plate. The related link below has some maps of these plates. 74 people found this useful.