TECTONIC PLATES

Primary plates

These seven plates comprise the bulk of the seven continents and the Pacific Ocean.

Secondary plates

These smaller plates are generally shown on major plate maps, but with the exception of the Arabian plate do not comprise significant land area.

Tertiary plates

Tertiary plates are grouped with the major plate that they would otherwise be shown as part of on a major plate map. Mostly these are tiny microplates, although in the case of the Nubian-Somalian and Australian-Capricorn-Indian plates these are major plates that are rifting apart. Some models identify more minor plates within current orogens like the Apulian, Explorer, Gorda, and Philippine Mobile Belt plates. The remainder of the tertiary plates are the dwindling remains of much larger ancient plates. There may or may not be scientific consensus as to whether a tertiary plate is a separate plate yet, is still a separate plate, or should be considered a separate plate, thus new research could change this list.[1][2][3][4]

http://en.wikipedia.org/wiki/List_of_tectonic_plates

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