Basalt walls and steps

The basalt walls at Mount Tomah are constructed of mainly hexagonal or pentagonal blocks. At the present basalt is sourced from a quary at Peats Ridge. There is a continuing building program. A team of stone workers are at present working on walls around the new education building.There are many older walls, one of my favourites is the wall behind the waterfall.

Making the dark light, an idea for gauze.

The lower steps in the garden have been built out of trachyte. Another volcanic rock. It was collected from the old Homebush sale yards in Sydney, when they we demolished. The trachyte is in square blocks.