Changes

  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

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Global sea level changes ([[eustacy]]) are cyclic phenomena. Six orders of [[Sea level cycle phase|sea level cycle]]s are recognized from [[Stratigraphy|stratigraphic]] evidence.<ref name=ch21r47>Van Wagoner, J., C., Mitchum, R., M., Campion, K., M., Rahmanian, V., D., 1990, Siliciclastic Sequence stratigraphy in Well Logs, Cores and Outcrops: Concepts for High-Resolution Correlation of Time and Facies: [http://store.aapg.org/detail.aspx?id=1196 AAPG Methods in Exploration Series No. 7], 55 p.</ref> Third-, fourth-, and fifth-order sea level cycles model sequence deposition for petroleum exploration. A third-order sequence is a composite of fourth- and fifth-order sequences.

Global sea level changes ([[eustacy]]) are cyclic phenomena. Six orders of [[Sea level cycle phase|sea level cycle]]s are recognized from [[Stratigraphy|stratigraphic]] evidence.<ref name=ch21r47>Van Wagoner, J. C., Mitchum, R. M., Campion, K. M., Rahmanian, V. D., 1990, Siliciclastic Sequence stratigraphy in Well Logs, Cores and Outcrops: Concepts for High-Resolution Correlation of Time and Facies: [http://store.aapg.org/detail.aspx?id=1196 AAPG Methods in Exploration Series No. 7], 55 p.</ref> Third-, fourth-, and fifth-order sea level cycles model sequence deposition for petroleum exploration. A third-order sequence is a composite of fourth- and fifth-order sequences.

The table below shows sea level cycle frequencies, thickness ranges, and stratigraphic names for third-, fourth-, and fifth-order sequences.

The table below shows sea level cycle frequencies, thickness ranges, and stratigraphic names for third-, fourth-, and fifth-order sequences.

==Superimposition of cycles==

==Superimposition of cycles==

[[file:exploring-for-stratigraphic-traps_fig21-7.png|300px|thumb|{{figure number|1}}Composite curve created by adding third-, fourth-, and fifth-order cycles together. From Van Wagoner et al., 1990; courtesy AAPG.]]

[[file:exploring-for-stratigraphic-traps_fig21-7.png|300px|thumb|{{figure number|1}}Composite curve created by adding third-, fourth-, and fifth-order cycles together. From Van Wagoner et al.;<ref name=ch21r47 /> courtesy AAPG.]]

Several frequencies, representing different orders of sea level cycles, are superimposed on one another to make a composite sea level cycle curve. For stratigraphic trap exploration, cycles that impact trap location are usually third-, fourth-, and fifth-order sea level cycles. [[:file:exploring-for-stratigraphic-traps_fig21-7.png|Figure 1]] shows how adding third-, fourth-, and fifth-order cycles together will produce a composite curve.

Several frequencies, representing different orders of sea level cycles, are superimposed on one another to make a composite sea level cycle curve. For stratigraphic trap exploration, cycles that impact trap location are usually third-, fourth-, and fifth-order sea level cycles. [[:file:exploring-for-stratigraphic-traps_fig21-7.png|Figure 1]] shows how adding third-, fourth-, and fifth-order cycles together will produce a composite curve.