what is marl
Not to be confused with Maerl. Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt. The dominant carbonate mineral in most marls is calcite, but other carbonate minerals such as aragonite, dolomite, and siderite may be present.
Best Answer: Marl is a type of grey-brown sedimentary stone composed of clay and lime. The word is also used to describe fabrics and clothes that are colored inconsistently or speckled, kind of like heathered fabric.