22 Feb

Lightning Ridge is an important paleontological site, with fossils dating back to the Cretaceous period, 110 million years ago. The sandstone rock once formed the bottom of a shallow inland sea where the remains of aquatic plants and animals were preserved. The site is especially important as a source of fossils of ancient mammals which, at that time, were small creatures living in a world dominated by dinosaurs. The fossils are sometimes opalised and discovered by opal miners. Important discoveries at Lightning Ridge include the ancestral monotremes Kollikodon ritchiei and Steropodon galmani.

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