Geography

Geology

Jervis Bay is a drowned river valley and formed 15,000 years ago, at the end of the last ice age. The bay took on its present appearance around 4000 BC after the sea levels had risen 120 m, and as sand dune barriers created the southern peninsula. Much of the rock in Jervis Bay is part of the Sydney Basin sandstone formation, which is 280-225 million years old, although lower areas

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