What is marle?

Marle is a type of sedimentary rock composed mainly of calcium carbonate and formed from the accumulation of shells and other organic debris. It is a soft and crumbly rock that is typically white, gray, or yellowish in color. Marle is commonly used as a source of lime for agricultural purposes, as well as for construction and decoration. It is also used in the production of cement and as a raw material in the manufacturing of paper and chemicals. Marle is found in many parts of the world, and its properties and uses can vary depending on the specific location and composition.