"Type locality, also called type area, is the locality where a particular rock type, stratigraphic unit or mineral species is first identified. If the stratigraphic unit ...
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in a locality is layered, it is called a stratotype, whereas the standard of reference for unlayered rocks is the type locality.
The term is similar to the term type site in archaeology or the term type specimen in biology." - (en.wikipedia.org 16.07.2022)