HUN Geological Model Eroded Horizons Masks v01

## **Abstract** 

The 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.



These 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:



Regional horizon name 	Age (geological stage)	Newcastle Coalfield	                                Hunter Coalfield	                    Western Coalfield	                        Central or Southern coalfields 



M600	                       Top Anisian	                Top Hawkesbury Sandstone	                Top Hawkesbury Sandstone	    Top Hawkesbury Sandstone	Base Wianamatta Group

M700	                       Top Olenekian	                Base Hawkesbury Sandstone	                Base Hawkesbury Sandstone	    Base Hawkesbury Sandstone	Base Hawkesbury Sandstone

P000	                       Top Changhsingian	        Base Narrabeen Group	                        Base Narrabeen Group	            Base Narrabeen Group	                Base Narrabeen Group

P100	                       Upper Wuchiapingian	Base Newcastle Coal Measures	        Base Newcastle Coal Measures   Top Watts Sandstone	                Top Bargo Claystone

P500	                       Mid Capitanian	                Base Tomago Coal Measures	                Base Wittingham Coal Measures  Base Illawarra Coal Measures	Base Illawarra Coal Measures

P550	                       Top Wordian	                Base Mulbring Siltstone	                        Base Mulbring Siltstone	            Base Berry Siltstone	                Base Berry Siltstone

P600	                       Mid Roadian	                Base Maitland Group	                        Base Maitland Group	            Base Shoalhaven Group	        Base Shoalhaven Group

P700	                       Upper Kungurian	        Top Base Greta Coal Measures	       Top Base Greta Coal Measures		

P900	                       Base Serpukhovian	        Base Seaham Formation	                       Base Seaham Formation		



with 'M' referring to Mesozoic and 'P' to Paleozoic.

## **Purpose** 

For display on HUN 2.12 geological figures (at the time of this metadata Figure 009)

## **Dataset History** 

Data 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.

## **Dataset Citation** 

Bioregional 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.

## **Dataset Ancestors** 

* **Derived From** [Hunter deep well completion reports](https://data.gov.au/data/dataset/f2df86d5-6749-48c7-a445-d60067109f08)



Tags: Hunter subregion, New South Wales, geoscientificInformation
Organization: Bioregional Assessment Program