Regionally significant basic raw materials...

Regionally significant basic raw materials 1:100 000 contains geoscientific data relating to basic raw material resources including clay, limesand, limestone, hard rock aggregate, sand and gravel. The data are held in GDA 94

Source

This data file or API can be downloaded from:

https://dasc.dmirs.wa.gov.au/home?productAlias=RegionallySignificantBRM100K