Limestone, fine-grained: Sedimentary rock primarily composed of calcite. Fine-grained limestone can range from argillaceous lime mud to finely crystalline varieties.
Is limestone a clastic rock?
Limestone is a sedimentary rock consisting of more than 50% calcium carbonate ( calcite - CaCO 3). Some limestones form from the cementation of sand and / or mud by calcite ( clastic limestone), and these often have the appearance of sandstone or mudstone. ...
Is limestone layered?
Limestone formations are usually clearly layered. Pure rock is light-colored. ... Dark gray spots are chert nodules and the boulders on the coast are also made of this rock type. Limy mud is often purely chemical precipitate.
