this stone is very unusual as it is a upturned solutions basin set on its side. the basins bottom edge is eroded away and undercuts its rim forming a trough that collects rain water. the left hand rim has a small hole punched through its edge that projects a ray of light, across basin’s surface, when the sun is at its highest and changing direction with the seasons.#sunstone, #rockbasin, #solutionsbasin, #naturalstonefeature, #calender, #prehistory, #solacamera, #solacalender, #suncalendar, #montagecity.com