Marlstones
Marlstones are sedimentary rocks that consist of a mixture of clay and calcium carbonate materials. They typically have a light gray to yellowish color and are often found in marine environments. Marlstones are formed through the gradual accumulation and compaction of calcium carbonate-rich mud and clay, resulting in a fine-grained, layered rock with a distinctive appearance. These rocks are commonly used in construction and as a source of lime for agricultural purposes.