This 3-D reflection seismic data from offshore Louisiana shows a single salt diapir. Two dataset are available which are the stacked and the migrated versions of the data. The 3-D Stack data was provided to SEP by Unocal. In this dataset the first dimension is in-line, the second dimension is cross-line and the third dimension is time. The top left corner of the data (increasing cross-line, decreasing in-lines) is blank meaning that no seismic data was acquired there. The 3-D Migrated data was provided by 3DGeo Development. The dimensions are transposed compared to the stack version: first dimension is depth, second dimension is in-line and the third dimension is cross-line.