The global reference profile of the base of the Induan is situated in Changxing County, China.

Six meters higher in the reference profile, the Fusulinida species Sphaeroschwagerina vulgaris aktjubensis appears.

In 2009, an official reference profile (GSSP) for the base of the Bartonian had not yet been established.

The base is, in the reference profile, located 36 meters below the top of the Marnes Bleues Formation.

A reference profile for the base (a GSSP) had in 2009 not yet been established.

In 2009, a GSSP (official reference profile) for both base and top had not yet been appointed.

The reference profile was subsequently revised to use the StrongARM processor.

The fossils and geology was recorded during the 1910s and 1920s, and is used within geological sciences as a strategic reference profile.

A reference profile for the base of the Albian stage (its GSSP) had in 2009 not yet been established.

An official reference profile (GSSP) for the base of the Lutetian had in 2009 not yet been established.