Changes

==''Glob alt'' sequence deposition==

==''Glob alt'' sequence deposition==

[[File:Sedimentary-basin-analysis fig4-44.png|thumbnail|{{figure number|1}}See text for explanation.]]

The ''Glob alt'' depositional sequence of Late Pliocene age (mapped in [[:file:sedimentary-basin-analysis_fig4-46.png|Figure 1]]) is part of depositional cycle 2 in [[:file:sedimentary-basin-analysis_fig4-44.png|Figure 2]]. 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 3]]). 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.

 

[[file:sedimentary-basin-analysis_fig4-47.png|thumb|{{figure number|2}}After Armentrout et al.<ref name=ArmentroutEtAl_1991>Armentrout, J. M., S. J. Malacek, P. Braithwaite, and C. R. Beeman, 1991, Seismic facies of slope basin turbidite reservoirs, East Breaks 160-161 field: Pliocene-Pleistocene, northwestern Gulf of Mexico, ''in'' P. Weimer and M. J. Link, eds., Seismic facies and sedimentary processes of submarine fans and turbidite systems: New York, Springer-Verlag, p. 223-239.</ref> Courtesy Springer-Verlag.]]

 

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.

==''Glob alt'' isochron and seismic facies map==

==''Glob alt'' isochron and seismic facies map==

==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 [[:file:sedimentary-basin-analysis_fig4-46.png|Figure 1a]]). 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.

 

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.

[[file:sedimentary-basin-analysis_fig4-48.png|thumb|{{figure number|4}}After Armentrout et al.<ref name=ArmentroutEtAl_1991 />. Courtesy Springer-Verlag.]]

[[file:sedimentary-basin-analysis_fig4-48.png|thumb|{{figure number|4}}After Armentrout et al.<ref name=ArmentroutEtAl_1991 />. Courtesy Springer-Verlag.]]