ABC Science-Matters "All that glitters" discussion

Looking down and eastward from Crackneck Lookout.
The pebble beach is just out of sight at bottom left, but photo shows something of wave patterns.
Although I am not familiar with the prevailing conditions here, I suspect the incoming waves would be fairly consistent in direction at the beach itself no matter which way the wind blows.


The pebble beach is just left of centre. Crackneck lookout can be identified directly above

Columnar basalt or "blue metal" as quarried at Kulnura within the Hawkesbury River catchment.