more solutions. rock basins on carnstabba hill. this extra large rock with its solutions basin overlooks the bussow reservoir and the stennack river valley towards rosewall hill and trevalgan. although difficult to date they are evidenced on neolithic monuments. they are the result of continuous agitation of mildly acidic rail water that breaks down the granite structure to form these consistent circular or oval depressions that can be up to a metre in diameter and half a metre deep. it is easy to see given their remarkably consistent appearance that they might be valued by people in prehistory as the work of their ancestors. . . . #prehistory, #ancestors, #solutionsbasin, #rockbasin, #ancientknowledge, #ancientcosmology, #carnstabba, #rosewallhill, #trevalgan, #westpenwith, #ancientmonuments, #megaliths, #ancientcornwall,