See more … limestone icons

April 2024

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April 2024

Limestone boulders at Castle Hill Scenic Reserve. Photo: Shaun Barnett/Black Robin Photography
Six spectacular limestone features to explore. Limestone is formed from the remains of calcareous sea creatures that settled in layers on the ocean floor and were compacted over eons. It can be eroded by the action of water. Composed of calcium, the rock is susceptible to chemical changes because of rainwater’s slight acidity. When uplifted […]
Shaun Barnett

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Shaun Barnett

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