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A stratotype or type section is a geological term that names the physical location or outcrop of a particular reference exposure of a stratigraphic sequence or stratigraphic boundary.[1] A unit stratotype is the agreed reference point for a particular stratigraphic unit and a boundary stratotype the reference for a particular boundary between strata.

See also[edit]


  1. ^ "Stratotypes and Type Localities". International Commission on Stratigraphy. Retrieved 2014-03-01.