NSW Seamless Geology update

An update to the NSW Seamless Geology Data Package (version 2) was released in May 2020 and includes:

  • Final data from the East Riverina Mapping Project.
  • Updates to the geology of several areas in the Lachlan Orogen.
  • Approximately 11,000 new structure points in the Lachlan Orogen and Curnamona Province.
  • New fault attribution information for the western Lachlan Orogen.
  • Detailed revision of the Cenozoic Igneous Province.
  • Detailed mapping of the Newcastle Coal Measures.
  • Extensive upgrades to the Rock Unit polygon attribute table. Over 30,000 attribution changes were made to the master look-up table, correcting spelling mistakes and colour code issues. Four new columns have been added to the attribute table to capture the best available isotopic dating for relevant units.
  • The geology of Lord Howe Island has also been included in the dataset for the first time.
  • The dataset is now also available in a single layer version, in which the various time slices have been flattened into a single layer, effectively presenting the surface geology only.

Datasets available for viewing and download

Value-added and related products

Numerous products using the NSW Seamless Geology Geodatabase have been generated or are in preparation. These include:

What is the NSW Seamless Geology?

  • An initial five-year project (2013–2018) to complete Version 1 of the statewide product.
  • Joins the best-available geological mapping (on a variety of scales) across NSW.
  • Connects line mismatches (e.g. geological boundaries, faults etc.) across existing geological map sheet boundaries.
  • Harmonises stratigraphic units across NSW.
  • Forms an integral part of ongoing work such as 3D, mineral potential and metamorphic mapping across NSW.
  • Will be a continuously updated dataset, with new versions released at regular intervals.
  • For a detailed explanation of the methods used in the NSW Seamless Geology Project, see the Quarterly Note 145 of the Geological Survey of NSW (GSNSW).

Features of the NSW Seamless Geology dataset

  • Data is presented as a series of lithotectonic layers/provinces that form geological time-slices (see figure below), ranging from the Palaeoproterozoic structural and metamorphic evolution of the Broken Hill Block, to the Quaternary depositional systems of the east coast.
  • It includes extensions of outcropping geology undercover (i.e. solid pre-Permian basement beneath younger sedimentary basins and unconsolidated sediments).
  • A standard database structure and schema contain comprehensive attribute tables for each stratigraphic unit, enabling detailed querying and extraction of datasets such as geology, structure, metamorphism and geochronology.
  • Free download is available in a variety of formats including GIS, mobile phone maps and online portals.

The NSW Seamless Geology dataset composed of lithotectonic layers/provinces

We would like your feedback

The NSW Seamless Geology dataset is compiled from the best available mapping - mostly from the GSNSW, with some thesis mapping. The data will be continuously improved by fixing identified issues, future GSNSW mapping programs and incorporation of better-quality company or thesis mapping, with periodic updates to improve the NSW Seamless Geology dataset.

Our aim is to make this dataset the authoritative source of geology for NSW.

So, if you find a problem or if you know of better mapping - please let us know!

NSW Seamless Geology project workflow

Contacts

gary.colquhoun@planning.nsw.gov.au

chris.folkes@planning.nsw.gov.au