Formal Name Informal Names
Epi-Super Group Super or Mega Sequence
Epi-Group Composite Sequence
Epi-Formation Sequence Set
Epi-Member Sequence (Depositional/TR/Genetic)
Epi-Compartment System Tract
Epi-Unit Parasequence, PAC, etc.
Epi-bed
Hierarchy of
Epi-stratigraphic Units