The new PDF emphasizes that . Abiological (inorganic) precipitation is rare today (e.g., ooids in high-energy, warm, supersaturated waters like the Bahamas) but was more common in the Precambrian before shell-secreting organisms evolved.
Over time, the accumulation of carbonate minerals on the seafloor leads to the formation of a carbonate sediment. This sediment can be composed of a variety of different carbonate minerals, including calcite, aragonite, and dolomite. The sediment can also contain other minerals, such as quartz and clay minerals, which are derived from erosion of pre-existing rocks. origin of carbonate sedimentary rocks pdf new