HUN Geological Model Eroded Horizons Masks v01

## **Abstract** \n\nThe dataset was derived by the Bioregional Assessment Programme from multiple source datasets. The source datasets are identified in the Lineage field in this metadata statement. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement.\n\n\n\nThese shapefiles (MGA94 coordinates) are masks used to constrain the extent of interpolations for the various horizons in the RMS geological model. The masks define where the formations outcrop on the surface and thus define the eroded surface in the current topography. The naming convention refers to the geological age and depth (TVD ss = total vertical depth subsea reported to the Australian Height Datum) of the various formations as follows:\n\n\n\nRegional horizon name \tAge (geological stage)\tNewcastle Coalfield\t Hunter Coalfield\t Western Coalfield\t Central or Southern coalfields \n\n\n\nM600\t Top Anisian\t Top Hawkesbury Sandstone\t Top Hawkesbury Sandstone\t Top Hawkesbury Sandstone\tBase Wianamatta Group\n\nM700\t Top Olenekian\t Base Hawkesbury Sandstone\t Base Hawkesbury Sandstone\t Base Hawkesbury Sandstone\tBase Hawkesbury Sandstone\n\nP000\t Top Changhsingian\t Base Narrabeen Group\t Base Narrabeen Group\t Base Narrabeen Group\t Base Narrabeen Group\n\nP100\t Upper Wuchiapingian\tBase Newcastle Coal Measures\t Base Newcastle Coal Measures Top Watts Sandstone\t Top Bargo Claystone\n\nP500\t Mid Capitanian\t Base Tomago Coal Measures\t Base Wittingham Coal Measures Base Illawarra Coal Measures\tBase Illawarra Coal Measures\n\nP550\t Top Wordian\t Base Mulbring Siltstone\t Base Mulbring Siltstone\t Base Berry Siltstone\t Base Berry Siltstone\n\nP600\t Mid Roadian\t Base Maitland Group\t Base Maitland Group\t Base Shoalhaven Group\t Base Shoalhaven Group\n\nP700\t Upper Kungurian\t Top Base Greta Coal Measures\t Top Base Greta Coal Measures\t\t\n\nP900\t Base Serpukhovian\t Base Seaham Formation\t Base Seaham Formation\t\t\n\n\n\nwith 'M' referring to Mesozoic and 'P' to Paleozoic.\n\n## **Purpose** \n\nFor display on HUN 2.12 geological figures (at the time of this metadata Figure 009)\n\n## **Dataset History** \n\nData was originally sourced from well completion reports and incorporated into the geological model. The final eroded model horizons were exported from RMS software as .dat files and converted to ESRI shapefiles.\n\n## **Dataset Citation** \n\nBioregional Assessment Programme (2015) HUN Geological Model Eroded Horizons Masks v01. Bioregional Assessment Derived Dataset. Viewed 22 June 2018, http://data.bioregionalassessments.gov.au/dataset/0499bee7-a0c4-45e8-978b-e0ef0055fb0e.\n\n## **Dataset Ancestors** \n\n* **Derived From** [Hunter deep well completion reports](https://data.gov.au/data/dataset/f2df86d5-6749-48c7-a445-d60067109f08)\n\n