A tectonic block is a part of the Earth's crust that can be treated as a solid rigid crustal block or lithospheric section. A tectonic block may be bounded by faults. It may move from one place to another because of a tectonic shift, and they may also be rotated. A tectonic block may have a proper name for example, the Muness Phyllite Block (which is located in

Unst Unst (; sco, Unst; nrn, Ønst) is one of the North Isles of the Shetland Islands, Scotland. It is the northernmost of the inhabited British Isles and is the third-largest island in Shetland after Mainland and Yell. It has an area of . Unst ...

and Uyea in Scotland), or the South China Block. Early use of the term tectonic block referred to the blocks of rock on either side of a fault. Continental regions may be subdivided into tectonic blocks which are mapped in order to determine earthquake risk.

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Tectonics {{tectonics-stub