Limestone itself is quarried in several places for a making stone, for use in streets, and to be used in reducing sulfur emissions from coal-burning energy crops. Phosphates are actually mined for fertilizer from Ordovician limestones, specially where by weathering has concentrated the phosphate, as in central Tennessee. Ordovician sandstones, https://nanaomycin-a33210.atualblog.com/34366897/top-latest-five-procyanidin-c1-urban-news