Name	Description	Types	Status
Complex	A lithostratigraphic unit composed of diverse types of any cl...	Concept	experimental
Megasequence	A succession of st of supersequences. A megasequence is bound...	Concept	experimental
Not specified	Unit is not part of a defined stratigraphic hierarchy.	Concept	experimental
Supergroup	A supergroup is a formal assemblage of related or superposed ...	Concept	experimental
Supersuite	A formal lithodemic unit next higher in rank to suite. It com...	Concept	experimental
Supersequence	A succession of sequences, which is delimited by remarkable 2...	Concept	experimental
Sequence	A succession of genetically related strata bounded on top and...	Concept	experimental
Group	A group is the lithostratigraphic unit next higher in rank to...	Concept	experimental
Subgroup	A subgroup is the lithostratigraphic unit next higher in rank...	Concept	experimental
Formation	A body of rock identified by lithic characteristics and strat...	Concept	experimental
Member	A formal lithostratigraphic unit next in rank below a formati...	Concept	experimental
Bed	The smallest formal lithostratigraphic unit, usually a distin...	Concept	experimental
Suite	A formal lithodemic unit next higher in rank to lithodeme. It...	Concept	experimental
Lithodeme	A body of predominantly intrusive, highly deformed and/or hig...	Concept	experimental
Parasequence	Relatively conformable succession of beds/units of geneticall...	Concept	experimental