Synthem
An
unconformity-bounded unit is a body of rock bounded above and below by specifically designated
discontinuites in the stratigraphic succession (angular unconformities,
disconformities, and so on), preferably of regional or interregional
extent. Being bounded by stratigraphic
discontinuites is the single diagnostic criterion used to
establish and recognize unconformity-bounded units: they
should be extended only as far as both of its bounding discontinuities are
identifiable. (Salvador, 1987, p.232)
Units extend only to limits of bounding
unconformities
As Unconformitiy ends, New
Unconformity-bounded Unit defined
Limit of
Unconformity/Discontinuity