rock patterns, Hawkesbury sandstone
Nearby are petroglyphs created by indigenous Australians. I suspect this particular pattern is natural geology, with a few added lines by humans.
One of my expert contacts suggested "this looks like a sandstone dyke, formed where unconsolidated sand was injected into a fracture cutting across the bedding. This is usually caused by an earthquake which creates the fracture and causes liquefaction of the sediment, allowing it to flow into the fracture."
Who says there's no straight lines in nature? Previously I'd seen long white lines in the rainforest in northern New South Wales, perfectly straight. But these were roots from the strangler fig.
No doubt this photographed area was significant to the indigenous people. They would have some mystical explanation for how this rocky pattern was formed.
The rock is Hawkesbury sandstone. These rock platforms give a clue to the massive sedimentary deposits laid down here in the Triassic. This was formerly a river delta. Of enormous size, similar to the Nile and Ganges deltas of today.
The moss (top right) is Campylopus bicolor.
rock patterns, Hawkesbury sandstone
Nearby are petroglyphs created by indigenous Australians. I suspect this particular pattern is natural geology, with a few added lines by humans.
One of my expert contacts suggested "this looks like a sandstone dyke, formed where unconsolidated sand was injected into a fracture cutting across the bedding. This is usually caused by an earthquake which creates the fracture and causes liquefaction of the sediment, allowing it to flow into the fracture."
Who says there's no straight lines in nature? Previously I'd seen long white lines in the rainforest in northern New South Wales, perfectly straight. But these were roots from the strangler fig.
No doubt this photographed area was significant to the indigenous people. They would have some mystical explanation for how this rocky pattern was formed.
The rock is Hawkesbury sandstone. These rock platforms give a clue to the massive sedimentary deposits laid down here in the Triassic. This was formerly a river delta. Of enormous size, similar to the Nile and Ganges deltas of today.
The moss (top right) is Campylopus bicolor.