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Hillwood quarry (Hillwood volcano), Craigburn, Tamar Valley, West Tamar municipality, Tasmania, Australia

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Latitude & Longitude (WGS84): 41° 13' 4'' South , 146° 57' 2'' East
Latitude & Longitude (decimal): -41.21792,146.95072
Köppen climate type:Cfb : Temperate oceanic climate

Tertiary basaltic outcrops, with an abandoned quarry. Columnar basalts with small sparse vesicles containing zeolites.

Mineral List

4 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

0 - 66 Ma

ID: 900502
mafic volcanic rocks 38495

Age: Cenozoic (0 - 66 Ma)

Description: Volcanic rocks, predominantly mafic; basalt, trachyte, trachybasalt, trachyandesite, leucitite, basanite, nephelinite, limburgite, rhyolite, tuff and high level intrusives; rare volcaniclastic sediments

Comments: igneous mafic volcanic; synthesis of multiple published descriptions

Lithology: Igneous mafic volcanic

Reference: Raymond, O.L., Liu, S., Gallagher, R., Zhang, W., Highet, L.M. Surface Geology of Australia 1:1 million scale dataset 2012 edition. Commonwealth of Australia (Geoscience Australia). [5]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Bottrill, R. S. & Baker, W. E. (2008): A Catalogue of the Minerals of Tasmania. Geological Survey Bulletin 73, Mineral Resources Tasmania, 254 pp.

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