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Museum closure:

The Museum will be closed from Sunday 20 July to Monday 28 July 2025 for the installation of our next exhibition, Speak Easy. The Museum will reopen on Tuesday 29 July.

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You Are Here : Home / Explore/ Natural heritage / Geology of the Tweed

Geology of the Tweed

Geological history

Geologically, the Tweed takes the form of a huge erosion caldera centred on Wollumbin / Mount Warning.

Fossicking in the Tweed

The Tweed has been a hot spot of fossickers Australia wide.

Thunder eggs

Unassuming rocks from the outside with a beautiful array of colours and crystals inside.
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Phone: 02 6670 2493
Email: trm@tweed.nsw.gov.au

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