Field Seminar on Seismic and Sequence Stratigraphy of Carbonate Systems: the 3 steps procedure
Step 1: Identify megasequence boundaries and subdivide the sedimentary record into major stratigraphic units that form the building blocks of basin analysis
Megasequences are the sedimentary response to the tectonic processes responsible for the creation and evolution of a basin. Subdividing the basin infill into megasequences provides a quick and efficient assessment of the geometry of the basin and of the resource potential of a region. During the field seminar, megasequence boundaries (MSBs) are identified on outcrop and mapped across the different depositional environments, from the inner platform where MSBs correspond to subaerial exposure surfaces, to the platform margin where MSBs correspond to hardgrounds or changes in major stratal staking patterns, to the basin where MSBs correspond to non-depositional hiatuses or correlative conformities. The integrity of the stratigraphic framework erected by depositional sequence mapping is constrained by biostratigraphic data.
The identification of megasequence boundaries is also performed with subsurface data from different basins, through the iterative examination of seismic lines, well logs and biostratigraphic and lithostratigraphic data.
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