Question: How many major tectonic plates have scientist identifed?

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  1. Do you mean right now?

    There are a minimum of 7 Major plates (African, Antarctic, Eurasian, North American, South American, Pacific, and Indo-Australian). Indo-Australian is considered most of the times 2 plates.

    There are a lot of minor plates, the biggest minor plates are: Arabian, Caribbean, Juan de Fuca (N-American Pacific), Cocos (N-American Pacific), Nazca (S-American Pacific), Philippine Sea and Scotia.

    There also a lot of micro-plates, or crustal blocks.

    In the past, as you guess, many more!!!

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