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==Minibasin structural-stratigraphic development==

==Minibasin structural-stratigraphic development==

[[File:Sedimentary-basin-analysis fig4-44.png|thumb|300px|{{Figure number|1}}]]

[[File:Sedimentary-basin-analysis fig4-44.png|thumb|300px|{{Figure number|1}}Schematic diagram of the seismic reflection profile along the west side of the East Breaks 160-161 field. From Armentrout and Clement (1990); courtesy Gulf Coast SEPM.]]

The structural/stratigraphic configuration of the East Breaks 160-161 minibasin formed well after ''Glob alt'' deposition. As discussed earlier, the High Island–East Breaks basin was a late Pliocene - early Pleistocene slope basin through which [http://cdn.intechopen.com/pdfs-wm/25729.pdf gravity flow sands] flowed southward. [[Depocenter#Sediment_supply_rate_and_facies_patterns|Progradation]] overloaded the underlying [[Halite|salt]] and minibasins formed as a succession of southward-stepping [[Growth fault|growth-fault]]/[http://www.beg.utexas.edu/indassoc/agl/pubs/Withdrawal.pdf salt-withdrawal] sediment thicks ([[:File:Sedimentary-basin-analysis fig4-44.png|Figure 1]]).

The structural/stratigraphic configuration of the East Breaks 160-161 minibasin formed well after ''Glob alt'' deposition. As discussed earlier, the High Island–East Breaks basin was a late Pliocene - early Pleistocene slope basin through which [http://cdn.intechopen.com/pdfs-wm/25729.pdf gravity flow sands] flowed southward. [[Depocenter#Sediment_supply_rate_and_facies_patterns|Progradation]] overloaded the underlying [[Halite|salt]] and minibasins formed as a succession of southward-stepping [[Growth fault|growth-fault]]/[http://www.beg.utexas.edu/indassoc/agl/pubs/Withdrawal.pdf salt-withdrawal] sediment thicks ([[:File:Sedimentary-basin-analysis fig4-44.png|Figure 1]]).

==Timing of fault movement==

==Timing of fault movement==

[[File:Sedimentary-basin-analysis fig4-43.png|thumb|300px|{{figure number|2}}]]

[[File:Sedimentary-basin-analysis fig4-43.png|thumb|300px|{{figure number|2}}North–south seismic section through the East Breaks 160-161 intraslope minibasin, showing the location of the East Breaks 160-161 field.]]

Fault movement timing is critical for trap formation timing. [[Growth fault|Growth-fault]] [http://structuralgeology.50webs.com/pagef21.htm rollover anticlines] develop by [[Dp|updip]] expansion and sediment entrapment on the downthrown side of the fault and consequent [[Dip|downdip]] sediment starvation and continued subsidence within the intraslope basin (see [[:File:Sedimentary-basin-analysis fig4-43.png|Figure 2]] for geometries above the ''Trim A'' interval along fault A′). Thus, the updip trap for [[http://cdn.intechopen.com/pdfs-wm/25729.pdf gravity gravity-flow sandstone] is the rollover into the fault, formed during the dynamic phase of fault movement.

Fault movement timing is critical for trap formation timing. [[Growth fault|Growth-fault]] [http://structuralgeology.50webs.com/pagef21.htm rollover anticlines] develop by [[Dp|updip]] expansion and sediment entrapment on the downthrown side of the fault and consequent [[Dip|downdip]] sediment starvation and continued subsidence within the intraslope basin (see [[:File:Sedimentary-basin-analysis fig4-43.png|Figure 2]] for geometries above the ''Trim A'' interval along fault A′). Thus, the updip trap for [[http://cdn.intechopen.com/pdfs-wm/25729.pdf gravity gravity-flow sandstone] is the rollover into the fault, formed during the dynamic phase of fault movement.

==Fault A′==

==Fault A′==

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Sedimentary-basin-analysis fig4-42.png|{{figure number|3}}

Sedimentary-basin-analysis fig4-42.png|{{figure number|3}}Structural elements that define the East Breaks 160-161 minibasin, which is bound on the north by fault A, on the east by faults B and C, and on the south by a salt- cored high. From Armentrout et al. (1991); courtesy Springer-Verlag.

Sedimentary-basin-analysis fig4-31.png|{{figure number|4}}

Sedimentary-basin-analysis fig4-31.png|{{figure number|4}}Composite chronostratigraphic chart that serves as an age model for the GOM basin Pliocene and Pleistocene, summarizing nine studies published between 1982 and 1993. From Armentrout (1996); courtesy The Geological Society, London.

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