Volcanic caves of Victoria (Surface features)

Selected photographs and diagrams

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Mount Napier in the background is the source volcano for the lava flow in the valley floor in the foreground.
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Lake Surprise: the crater lake of Mount Eccles.
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An old quarry into the side of the scoria cone of Mount Eccles.
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The Wallacedale Tumuli

The Wallacedale Tumuli are one of the better examples of these abrupt, steep-sided mounds. They are formed by uplift of the crust by the pressure of the liquid lava below. But why they are so localised is uncertain.
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One of the Wallacedale Tumuli
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Another tumulus - with the top cracked open.
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Detail of the steep side of a tumulus
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