Dictionary:Sequence boundary

ADVERTISEMENT
From SEG Wiki
Revision as of 11:06, 22 June 2017 by Jlnustes (talk | contribs) (Marked this version for translation)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Other languages:
English • ‎español


A type-1 sequence boundary (or unconformity) is characterized by subaerial erosion, stream rejuvination, a basinward shift of facies, a downward shift in coastal onlap, and onlap of overlying strata. A type-2 sequence boundary lacks the subaerial erosion associated with stream rejuvenation and the abrupt basinward shift of facies. It forms when the rate of eustatic fall is less than the rate of basin subsidence at the depositional shoreline break. See Figure S-32.