Qualla: Mount Gambier

Mount Gambier: Introduction

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit Admella1859 (talk), Public domain. Each year, sometime in November, a lake in South Australia performs a trick that science still cannot fully explain. For half the year the Blue Lake of Mount Gambier sits in its crater a sullen, wintry grey. Then, as summer warms the water, it transforms - over a few weeks the whole 70-metre-deep lake floods to a vivid cobalt blue so intense it looks retouched. By autumn it fades back to grey. The Bungandidj people knew this country long before anyone gave the lake a colour for a name; to them the volcano was Berrin, and they have watched it sleep for far longer than the city built on its slopes.

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Image: Admella1859 (talk) | Public domain

Mount Gambier: The Lake That Changes Colour

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit Thom Devereux, CC BY-SA 4.0. The Blue Lake fills one crater of a maar volcano - a broad, shallow basin blasted out when rising magma met groundwater and exploded into steam. The water is artesian, clean enough to supply the city, and around 75 metres deep at its lowest point. The summer colour shift is thoug...

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Image: Thom Devereux | CC BY-SA 4.0

Mount Gambier: A City Full of Holes

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit User:Satellizer, CC BY-SA 4.0. Mount Gambier sits at the heart of the Limestone Coast, and limestone, given enough time and groundwater, dissolves. The result is a townscape pocked with sinkholes and water-filled caves, some of them in the middle of the city itself. The Cave Garden, known to the Bungandidj as ...

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Image: User:Satellizer | CC BY-SA 4.0

Mount Gambier: Berrin and the Bungandidj

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit State Government Photographer, CC0. The Bungandidj people are the traditional owners of this country. They called the peak Berrin and spoke of it as the home of the eagle hawk. When pastoralists arrived in the 1840s, the land was taken rapidly and violently: shepherds and settlers clashed with the original inhabita...

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Image: State Government Photographer | CC0

Mount Gambier: A Sighting and a Tower

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit Biatch, CC BY-SA 3.0. The crater was first noted by colonists in December 1800, when Lieutenant James Grant, sailing the survey brig Lady Nelson past the coast, spotted the peak and named it for Lord Gambier, an admiral of the British fleet - the first place the British named in what would become Sout...

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Image: Biatch | CC BY-SA 3.0