--> Abstract: Development of a Chronostratigraphic Framework from the Well-Log/Seismic Sequence Stratigraphy of Miocene-Pleistocene Depositional Sequences, High Island Area, Offshore Texas, AAPG Transect-Phase II, by K. Coterill, S. Allen, F. De Tagle, A. Soto, C. Liu, G. Perez-Cruz, W. Wornardt, and P. Vail; #91006 (1991)
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Development of a Chronostratigraphic Framework from the Previous HitWellNext Hit-Previous HitLogNext Hit/Seismic Previous HitSequenceNext Hit Stratigraphy of Miocene-Pleistocene Depositional Sequences, High Island Area, Offshore Texas, AAPG Transect-Phase II

COTERILL, KATRINA, SHARON ALLEN, FRANCISCO DE TAGLE, ARTURO SOTO, CHINGJU LIU, GUILLERMO PEREZ-CRUZ, WALTER WORNARDT, and PETER VAIL, Rice University, Houston, TX

Detailed Previous HitsequenceNext Hit stratigraphic Previous HitanalysisNext Hit is used to define genetic chronostratigraphic intervals and delineate correlative lithofacies in northern Gulf of Mexico Miocene through Pleistocene depositional sequences. This Previous HitanalysisNext Hit is accomplished by integration of seismic profiles, velocity surveys, electric logs, micropaleontology reports, and, where available, high-resolution biostratigraphic information. Correlative Previous HitsequenceNext Hit and systems tract boundaries and the depositional systems and associated lithofacies tracts located within these boundaries are determined by integration of Previous HitsequenceNext Hit stratigraphic interpretation procedures.

The oldest datable Previous HitsequenceNext Hit boundary within the area is 22 million years old, early Miocene, and occurs in the northern updip

end of the trend. The youngest sequences are high-frequency cycles of 100,000-year duration and are present at the top of the section, obtaining their greatest thickness in the most southerly, downdip Previous HitwellNext Hit locations. Older sequences are dominated by lowstand slope fan deposits, while younger sequences are primarily composed of lowstand prograding complexes. Transgressive and highstand systems tracts remain thin throughout the section but are thickest in the neritic environments.

The onlap and downlap patterns typical of Previous HitsequenceNext Hit and systems tract boundaries are obscured by the tectonic style of the region. Syndepositional, listric "growth" faulting is abundant and occurs in conjunction with widespread salt diapirism. Nevertheless, the sequences and systems tracts are readily recognizable within the overall progradational stacking pattern that fills the northern Gulf of Mexico. As a result, Previous HitsequenceNext Hit stratigraphy provides a means to develop a chronostratigraphic framework that is essential for accurate mapping and Previous HitanalysisTop of depositional systems and lithofacies tracts of the Miocene through Pleistocene section in the High Island area of the northern Gulf of Mexico.

 

AAPG Search and Discovery Article #91006 © 1991 GCAGS and GC-SEPM Meeting, Houston, Texas, October 16-18, 1991 (2009)