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| ==''Glob alt'' sequence deposition== | | ==''Glob alt'' sequence deposition== |
− | The ''Glob alt'' depositional sequence of Late Pliocene age (mapped below) is part of depositional cycle 2 in Figure 4-44. The sequence, deposited on a relatively open slope with only slightly undulating sea-floor topography, thins rapidly basinward due to sediment starvation in the most distal areas of the High Island-East Breaks depocenter (Figure 4-47). Subsequent progradation resulted in differential loading of the allochthonous salt and formation of local depocenters between downloaded growth fault sediment prisms and differentially displaced salt-cored anticlines.
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− | [[file:sedimentary-basin-analysis_fig4-47.png|thumb|{{figure number|4-47}}After Armentrout et al.<ref name=ch04r7 />). Copyright: Springer-Verlag.]] | + | [[File:Sedimentary-basin-analysis fig4-44.png|thumbnail|left|{{figure number|1}}.]] |
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| + | [[file:sedimentary-basin-analysis_fig4-47.png|thumb|{{figure number|2}}After Armentrout et al.<ref name=ch04r7 /> Copyright: Springer-Verlag.]] |
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| + | The ''Glob alt'' depositional sequence of Late Pliocene age (mapped below) is part of depositional cycle 2 in [[:file:sedimentary-basin-analysis_fig4-44.png|Figure 1]]. The sequence, deposited on a relatively open slope with only slightly undulating sea-floor topography, thins rapidly basinward due to sediment starvation in the most distal areas of the High Island-East Breaks depocenter ([[:file:sedimentary-basin-analysis_fig4-47.png|Figure 2]]). Subsequent progradation resulted in differential loading of the allochthonous salt and formation of local depocenters between downloaded growth fault sediment prisms and differentially displaced salt-cored anticlines. |
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| ==''Glob alt'' isochron and seismic facies map== | | ==''Glob alt'' isochron and seismic facies map== |
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| ==Well-log cross section== | | ==Well-log cross section== |
− | The following figure is a well-log cross section of the ''Glob alt'' reservoir interval; datum is a mudstone within the GA-2 sandstone (well locations are shown on Figure 4-46). All logs are spontaneous potential with true vertical depth displays. The GA-4 reservoir sand is below the displayed interval. Log profiles are annotated: arrow C = funnel-shaped, coarsening-upward sandstone; arrow F = bell-shaped, fining-upward sandstone; parallel lines B = blocky profile of relatively thick sandstones and thin mudstone interbeds.
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− | [[file:sedimentary-basin-analysis_fig4-46.png|thumb|{{figure number|4-46}}After Armentrout et al.<ref name=ch04r7 />). Copyright: Springer-Verlag. Original map by Charles R. Beeman, Mobil Oil, 1987.]] | + | [[file:sedimentary-basin-analysis_fig4-46.png|thumb|{{figure number|3}}After Armentrout et al.<ref name=ch04r7 />). Copyright: Springer-Verlag. Original map by Charles R. Beeman, Mobil Oil, 1987.]] |
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| + | The following figure is a well-log cross section of the ''Glob alt'' reservoir interval; datum is a mudstone within the GA-2 sandstone (well locations are shown on [[:file:sedimentary-basin-analysis_fig4-46.png|Figure 3]]). All logs are spontaneous potential with true vertical depth displays. The GA-4 reservoir sand is below the displayed interval. Log profiles are annotated: arrow C = funnel-shaped, coarsening-upward sandstone; arrow F = bell-shaped, fining-upward sandstone; parallel lines B = blocky profile of relatively thick sandstones and thin mudstone interbeds. |
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| ==Net sandstone isopachs== | | ==Net sandstone isopachs== |