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as red, green, and black are possible). d.Marble—coarsely crystalline calcite or dolomite. Forms from a limestone protolith. Extensive recrystallization completely changes the rock. Original textures and fossils in the parent are obliterated. A favorite stone for sculpture. Exhibits a variety of colors. Marble may have color banding e.Marble is a metamorphic rockthat forms when limestoneis subjected to the heat and pressure of metamorphism. It is composed primarily of the mineral calcite(CaCO3) and usually contains other minerals, such as clay minerals, micas, quartz, pyrite, iron oxides, and graphite. Under the conditions of metamorphism, the calcite in the limestone recrystallizes to form a rock that is a mass of interlocking calcite crystals. f.Limestone is a sedimentary rockcomposed primarily of calcium carbonate (CaCO3) in the form of the mineral calcite. It most commonly forms in clear,
warm, shallow marine waters. It is usually an organic sedimentary rock that forms from the accumulation of shell, coral, algal, and fecal debris. It can also be a chemical sedimentary rock formed by the precipitation of calcium carbonate from lake or ocean water. g.Fossiliferous limestone—contains visible fossil shells. Micrite—fine carbonate mud. Chalk—made up of plankton shells