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[[:file:sedimentary-basin-analysis_fig4-40.png|Figure 1]] shows the relationship between 23 fields in the High Island-East Breaks depocenter that produce from the ''Glob alt'' sandstones and the ''Glob alt'' sandstone 200-ft (60-m) isopach. Most of the fields with ''Glob alt'' reservoirs occur around the perimeter of the maximum thickness of net sandstone, near the 200-ft (60-m) isopach. Nearly all of the ''Glob alt'' reservoirs occur basinward of the lowstand middle-to-outer neritic biofacies boundary [approximately [[length::600 ft]] (200 m) water depth]. Thus, they are downslope from the shelf/slope inflection and below normal wave base where sedimentation is dominated by gravity-flow processes.

[[:file:sedimentary-basin-analysis_fig4-40.png|Figure 1]] shows the relationship between 23 fields in the High Island-East Breaks depocenter that produce from the ''Glob alt'' sandstones and the ''Glob alt'' sandstone 200-ft (60-m) isopach. Most of the fields with ''Glob alt'' reservoirs occur around the perimeter of the maximum thickness of net sandstone, near the 200-ft (60-m) isopach. Nearly all of the ''Glob alt'' reservoirs occur basinward of the lowstand middle-to-outer neritic [[Fossil assemblage|biofacies]] boundary [approximately [[length::600 ft]] (200 m) water depth]. Thus, they are downslope from the shelf/slope inflection and below normal wave base where sedimentation is dominated by gravity-flow processes.

Deposition by gravity-flow processes occurs within physiographic lows.<ref name=ch04r53>Kneller, B., 1995, Beyond the turbidite paradign: physical models for deposition of turbidites and their implications for reservoir prediction, in Hartley, A., J., Prosser, D., J., eds., Characterization of Deep Marine Clastic Systems: Geological Society, London, Special Publication 94, p. 31–49.</ref><ref name=ch04r53 /> Although each field occurs within a local structural high, most have a major stratigraphic component related to their transport through slope channels and deposition as a gravity-flow deposit within the axis of a salt-withdrawal valley (see [[:file:sedimentary-basin-analysis_fig4-42.png|Figures 3]], [[:file:sedimentary-basin-analysis_fig4-43.png|4]], and [[:file:sedimentary-basin-analysis_fig4-56.png|5]] for the East Breaks 160-161 field). The sands within these valleys were deposited with a slope-parallel orientation. The trapping structure develops after reservoir deposition as the dip-oriented sand bodies are tilted along the flanks of the salt-cored anticlines ([[:file:sedimentary-basin-analysis_fig4-41.png|Figure 2]]). The anticlines continue to grow, and the tilt of the sand body becomes progressively more accentuated as each successive cycle of [[Syncline|synclinal]] fill accumulates and displaces the underlying salt.

Deposition by gravity-flow processes occurs within physiographic lows.<ref name=ch04r53>Kneller, B., 1995, Beyond the turbidite paradign: physical models for deposition of turbidites and their implications for reservoir prediction, in Hartley, A., J., Prosser, D., J., eds., Characterization of Deep Marine Clastic Systems: Geological Society, London, Special Publication 94, p. 31–49.</ref><ref name=ch04r53 /> Although each field occurs within a local structural high, most have a major stratigraphic component related to their transport through slope channels and deposition as a gravity-flow deposit within the axis of a salt-withdrawal valley (see [[:file:sedimentary-basin-analysis_fig4-42.png|Figures 3]], [[:file:sedimentary-basin-analysis_fig4-43.png|4]], and [[:file:sedimentary-basin-analysis_fig4-56.png|5]] for the East Breaks 160-161 field). The sands within these valleys were deposited with a slope-parallel orientation. The trapping structure develops after reservoir deposition as the dip-oriented sand bodies are tilted along the flanks of the salt-cored anticlines ([[:file:sedimentary-basin-analysis_fig4-41.png|Figure 2]]). The anticlines continue to grow, and the tilt of the sand body becomes progressively more accentuated as each successive cycle of [[Syncline|synclinal]] fill accumulates and displaces the underlying salt.