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Reference.org
Type locality (geology)
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<p>Type locality, also called type area, is the locality where a particular <a href="/facts/Rock_(geology)/FXCJkmop">rock type</a>, <a href="/facts/Lithostratigraphy/KhskmKLs">stratigraphic unit</a> or <a href="/facts/Mineral/LkUFbNmv">mineral species</a> is first identified. If the stratigraphic unit in a locality is layered, it is called a <a href="/facts/Stratotype/GD9DvxGF">stratotype</a>, whereas the standard of reference for unlayered rocks is the type locality. </p><p>The concept is similar to <a href="/facts/Type_site/GmpVEq2Q">type site</a> in <a href="/facts/Archaeology/K3Q5P38R">archaeology</a>. </p>