Through that intervening 300 million years, it has changed dramatically. The last period of glaciation was 12,000 years ago, when Sydney Harbour was a river valley. It was carved by glaciers at that time. When people think about climate change and rising ocean levels - at that time the ocean was 120 metres lower than it is today.
So what happened is when those glaciers melted 12,000 years ago – what is now Sydney Harbour was a river valley that was drowned. The water flooded in and the water level rose 120 metres. If you think about that in the context of where Sydney exists now, the Sydney of today once would have been well above the water line.
When those glaciers melted 12,000 years ago – what is now Sydney Harbour was a river valley that was drowned. The water flooded in and the water level rose 120 metres.
Through that intervening 300 million years, it has changed dramatically. The last period of glaciation was 12,000 years ago, when Sydney Harbour was a river valley. It was carved by glaciers at that time. When people think about climate change and rising ocean levels - at that time the ocean was 120 metres lower than it is today.
So what happened is when those glaciers melted 12,000 years ago – what is now Sydney Harbour was a river valley that was drowned. The water flooded in and the water level rose 120 metres. If you think about that in the context of where Sydney exists now, the Sydney of today once would have been well above the water line.
When those glaciers melted 12,000 years ago – what is now Sydney Harbour was a river valley that was drowned. The water flooded in and the water level rose 120 metres.
Why are old trees so important for endangered woodland birds? It takes a tree 100 years or more, generally, to start developing hollows. These hollows are critical for nest sites for these birds
Writer Helen Cushing recounts a wonderful day's cycling over the hills near Christchurch in New Zealand with views across to Lyttleton Harbour and the Banks Peninsula
You quite often see birds, particularly the Pacific Gulls and the New Zealand Kelp Gulls using the wind running over the sand dune at the neck to play, circle and swoop back and forth for hours.
This grading system for the difficulty of paddling sea, estuaries and large areas of open water has been developed by PaddleNSW qualified Sea Instructors to assist in describing waterways.
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