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Other correlation features (view source)
Revision as of 16:59, 23 January 2014
, 16:59, 23 January 2014no edit summary
==Transgressive surface==
==Transgressive surface==
A transgressive surface forms during a transgression. It is the physical boundary between the lowstand and transgressive systems tracts and is defined by the change from forestepping to backstepping. It merges with the basal unconformity landward of the point where the lowstand systems tract pinches out.<ref name=ch21r48 />
A transgressive surface forms during a transgression. It is the physical boundary between the lowstand and transgressive systems tracts and is defined by the change from forestepping to backstepping. It merges with the basal unconformity landward of the point where the lowstand systems tract pinches out.<ref name=ch21r48 />
[[file:exploring-for-stratigraphic-traps_fig21-17.png|thumb|{{figure number|1}}See text for explanation.]]
==Downlap surface==
==Downlap surface==
==Example: identifying MFS with biostratigraphic data==
==Example: identifying MFS with biostratigraphic data==
In the example below from the Gulf of Suez basin, planktonic and foraminiferal data taken on a 30-ft (9.1-m) interval show abundance peaks crossing a sharp log break from a thin carbonate to marine shale. Abundance peaks such as this are a common feature of the maximum flooding surface (MFS). Seismic and well log correlations confirm that this break is an MFS overlain by a prograding clastic wedge.
In [[file:exploring-for-stratigraphic-traps_fig21-17.png|Figure 1]] from the Gulf of Suez basin, planktonic and foraminiferal data taken on a 30-ft (9.1-m) interval show abundance peaks crossing a sharp log break from a thin carbonate to marine shale. Abundance peaks such as this are a common feature of the maximum flooding surface (MFS). Seismic and well log correlations confirm that this break is an MFS overlain by a prograding clastic wedge.
The computer-generated labels on the right side post alternative sequence boundary picks. In this way the interpreter can choose the best pick from all available well and seismic information.
The computer-generated labels on the right side post alternative sequence boundary picks. In this way the interpreter can choose the best pick from all available well and seismic information.
==See also==
==See also==