Changes

The well correlation section on the next page is an example of using high-resolution biostratigraphic correlation to recognize depositional successions within stacked depositional sequences. In some basins containing nondescript fill that lacks unique marker beds, like the Gulf of Mexico, high-resolution biostratigraphic correlation is the best method for subdividing basin fill into sequences and systems tracts.<ref name=ch04r6>Armentrout, J., M., 1987, Integration of biostratigraphy and seismic stratigraphy: Pliocene–Pleistocene, Gulf of Mexico: Proceedings, Gulf Coast Section SEPM 8th Annual Research Conference, p. 6–14.</ref><ref name=ch04r34>Galloway, W., E., 1989a, [http://archives.datapages.com/data/bulletns/1988-89/data/pg/0073/0002/0100/0125.htm Genetic stratigraphic sequences in basin analysis I: architecture and genesis of flooding-surface bounded depositional units]: AAPG Bulletin, vol. 73, p. 125–142.</ref><ref name=ch04r35>Galloway, W., E., 1989b, [http://archives.datapages.com/data/bulletns/1988-89/data/pg/0073/0002/0100/0143.htm Genetic stratigraphic sequences in basin analysis II: application to northwest Gulf of Mexico Cenozoic basin]: AAPG Bulletin, vol. 73, p. 143–154.</ref>

The well correlation section on the next page is an example of using high-resolution biostratigraphic correlation to recognize depositional successions within stacked depositional sequences. In some basins containing nondescript fill that lacks unique marker beds, like the Gulf of Mexico, high-resolution biostratigraphic correlation is the best method for subdividing basin fill into sequences and systems tracts.<ref name=ch04r6>Armentrout, J., M., 1987, Integration of biostratigraphy and seismic stratigraphy: Pliocene–Pleistocene, Gulf of Mexico: Proceedings, Gulf Coast Section SEPM 8th Annual Research Conference, p. 6–14.</ref><ref name=ch04r34>Galloway, W., E., 1989a, [http://archives.datapages.com/data/bulletns/1988-89/data/pg/0073/0002/0100/0125.htm Genetic stratigraphic sequences in basin analysis I: architecture and genesis of flooding-surface bounded depositional units]: AAPG Bulletin, vol. 73, p. 125–142.</ref><ref name=ch04r35>Galloway, W., E., 1989b, [http://archives.datapages.com/data/bulletns/1988-89/data/pg/0073/0002/0100/0143.htm Genetic stratigraphic sequences in basin analysis II: application to northwest Gulf of Mexico Cenozoic basin]: AAPG Bulletin, vol. 73, p. 143–154.</ref>

The four wells in the [[cross section]] are in a depositionally dip-oriented transect.<ref name=ch04r9 /> The correlation horizons, based on seven chronostratigraphically significant bioevents (mostly extinction events), partition the strata into age-correlative intervals.<ref name=ch04r10 /> Most of the chronostratigraphically significant bioevents occur in association with maximum fossil abundance, resulting in the interpretation of these correlation horizons as maximum flooding surface-condensed section data.<ref name=ch04r34 /><ref name=ch04r35 /><ref name=ch04r10 /><ref name=Shaffer1987a>Schaffer, B. L., 1987a, The potential of calcareous nannofossils for recognizing Plio-Pleistocene climactic cycles and sequence boundaries on the shelf: Proceedings, Gulf Section SEPM 8th Annual Research Conference, p. 142-145.</ref><ref name=Shaffer1987b>Schaffer, B. L., 1987b, The nature and significance of condensed sections in Gulf Coast late Neogene sequence stratigraphy: Gulf Coast Assoc. of Geological Societies Transactions, vol. 40, p. 186-195.</ref><ref name=ch04r72>Pacht, J., A., Bowen, B., E., Bearn, J., H., Schaffer, B., L., 1990, [[Sequence stratigraphy]] of Plio–Pleistocene depositional facies in the offshore Louisiana south additions: Gulf Coast Assoc. of Geological Societies Transactions, vol. 40, p. 1–18.</ref><ref name=ch04r9 />

The four wells in the [[cross section]] are in a depositionally dip-oriented transect.<ref name=ch04r9 /> The correlation horizons, based on seven chronostratigraphically significant bioevents (mostly extinction events), partition the strata into age-correlative intervals.<ref name=ch04r10 /> Most of the chronostratigraphically significant bioevents occur in association with maximum fossil abundance, resulting in the interpretation of these correlation horizons as maximum flooding surface-condensed section data.<ref name=ch04r34 /><ref name=ch04r35 /><ref name=ch04r10 /><ref name=Shaffer1987a>Schaffer, B. L., 1987a, The potential of calcareous nannofossils for recognizing Plio-Pleistocene climactic cycles and sequence boundaries on the shelf: Proceedings, Gulf Section SEPM 8th Annual Research Conference, p. 142-145.</ref><ref name=Shaffer1987b>Schaffer, B. L., 1987b, The nature and significance of condensed sections in Gulf Coast late Neogene sequence stratigraphy: Gulf Coast Assoc. of Geological Societies Transactions, vol. 40, p. 186-195.</ref><ref name=ch04r72>Pacht, J., A., Bowen, B., E., Bearn, J., H., Schaffer, B., L., 1990, Sequence stratigraphy of Plio–Pleistocene depositional facies in the offshore Louisiana south additions: Gulf Coast Assoc. of Geological Societies Transactions, vol. 40, p. 1–18.</ref><ref name=ch04r9 />

Each well panel is formatted the same as [[:file:sedimentary-basin-analysis_fig4-23.png|Figure 3]]. The foraminiferal (left histogram) and calcareous nannoplankton (right histogram) abundance patterns of each well are very similar. Biostratigraphic correlation horizons (horizontal lines) provide ties between the wells, facilitating comparison between the abundance patterns and [[Fossil assemblage|biofacies]] variations within each chronostratigraphic interval. Each correlation was checked against correlations independently constructed using a regional grid of seismic reflection profiles.

Each well panel is formatted the same as [[:file:sedimentary-basin-analysis_fig4-23.png|Figure 3]]. The foraminiferal (left histogram) and calcareous nannoplankton (right histogram) abundance patterns of each well are very similar. Biostratigraphic correlation horizons (horizontal lines) provide ties between the wells, facilitating comparison between the abundance patterns and [[Fossil assemblage|biofacies]] variations within each chronostratigraphic interval. Each correlation was checked against correlations independently constructed using a regional grid of seismic reflection profiles.