chalk formations

Chalk formations are layered sedimentary rocks mainly made of tiny calcium carbonate shells from microscopic marine organisms called coccolithophores. Over millions of years, these shells accumulated on the sea floor, compacted, and solidified into soft, white or light-colored rock known as chalk. These formations often develop in areas that were once shallow seas, and their distinctive layered appearance reflects periodic changes in sediment deposition. Chalk is porous and easy to work with, making it historically important for agriculture, construction, and artistic uses.