Steep
cliff face. Can be accessed via the Acacia Ridge walk from
Arkaroola village.
The ridge itself is of Blue
Mine Conglomerate, one of the older sediments of the
Adelaide Geosyncline. If you look closely at the pieces of
rock it has crystals in it; these are quartz a mineral found in
granite, an igneous
rock. Thus, Blue
Mine Conglomerate (an arkose) is formed from sediments laid down 800-900 million years ago resulting from the erosion of an even older
granite—an island mass to the north. In some
places the Blue
Mine Conglomerate is finely grained like quartzite and like that too, it displays ripple marks.These sediments are no longer lying flat as can be seen by the bare, near vertical faces visible both along the road and the walk