.A relatively conformable succession of strata
bounded at its top and base by unconformities or their
correlative conformities.
Depositional Sequence
Mitchum and others,
1997
Stratal Unit Extends Beyond Limit of
Unconformity.
Sequence Boundaries defined by unconformities
& their correlative conformities.
The concept of the Correlative Conformity is
a major step change for creating
3-d surface-bounded volume of strata
Sequence Boundary