Translations:Picking unconformities/3/en

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  1. In areas where pre- and postunconformity sections are in layer-parallel contact, the seismic response to an unconformity is a single continuous reflection, meaning it can be tracked accurately as a horizon. It can be autotracked wherever possible and would have to be tracked manually where signal-to-noise ratio and image quality preclude feature- or correlation-based autotracking.
  2. In areas where pre- and postunconformity sections are in angular contact, the seismic response to an unconformity appears as reflection terminations or discontinuities between groups of reflections, meaning it can be tracked manually only in the same manner that faults are picked. I make the distinction that in the great majority of cases, signal-to-noise ratio and image quality preclude effective operation of fault autopicking algorithms.