This download package contains the 2001 Otway Basin Seismic Mapping project. The data is available in ASCII, Petrosys and Shapefile formats. This dataset contains grid and contour files of depths, two-way time and isopachs to significant seismic horizons over the Otway Basin in South Australia, along with the associated fault and polygon files. Seismic Horizons -------------------- CN – Cainozoic Sed. SH – Sherbrook Gp. EU – Eumeralla Fm. CR – Crayfish Fm. Z – Basement (Base Mesozoic) Horizons Mapped --------------------- SHd – Top Sherbrook Group Depth EUd – Top Eumeralla Fm Depth CRd – Top Crayfish Group Depth Zd – Basement Depth SHt – Top Sherbrook Group TWT EUt – Top Eumeralla Fm TWT CRt – Top Crayfish Group TWT Zt – Basement TWT CNi – Cainozoic Sediments Isopach SHi – Sherbrook Group Isopach EUi – Eumeralla Fm Isopach CRi – Crayfish Group Isopach Depths are in metres below MSL datum. Grid, Contour, Fault & Polygon format details can be found in the file otway_format.pdf. Data projected in UTM Southern Hemisphere Zone 54 Projection - UTM Universal Transverse Mercator Spheroid - GRS80 Datum - GDA94