In environments with high evaporation or specific water chemistry, calcium carbonate can precipitate directly from supersaturated water, forming structures like ooids (spherical grains).
. From microscopic plankton to massive coral reefs, these creatures extract calcium and carbonate ions from seawater to build shells and skeletons. When these organisms die, their remains accumulate on the ocean floor, creating layers of biogenic sediment Chemical Precipitation origin of carbonate sedimentary rocks pdf extra quality