Grid references in this publication refer to the Geocentric Datum of Australia 1994 (GDA94) or 2020 (GDA2020). Locations mentioned in the text are referenced using Map Grid Australia (MGA) coordinates, Zones 49 to 52. No conversion from GDA94 to GDA2020 has been applied to coordinates quoted for units published prior to October 2025. All locations are quoted to at least the nearest 100 m.
Capitalized names in text refer to standard 1:100 000 map sheets, unless otherwise indicated.
WAROX is GSWA’s field observation and sample database. WAROX site IDs have the format ‘ABCXXXnnnnnnSS’, where ABC = geologist username, XXX = project or map code, nnnnnn = 6 digit site number, and SS = optional alphabetic suffix (maximum 2 characters).
Unless otherwise stated, all isotopic ages are based on U–Pb analysis of zircon and quoted within 95% uncertainties, with U–Pb measurements collected using a sensitive high-resolution ion microprobe (SHRIMP) in the John de Laeter Centre at Curtin University, Perth, Western Australia.
Digital data related to WA Geology Online, including geochronology and digital geology, are available online at the Department’s Data and Software Centre and may be viewed in map context at GeoVIEW.WA.