OIL OF LUTITAS of Latin lutum, sludge Lutita is a sedimentary rock made up of fine deposits of silt or sludge. They are varied or of a certain color depending on the consistency of the original material. When it has been organic material its coloration is black and are called bituminous lutitas, or luti oil. Whether they are red or yellow it is because they formed in oxidizing environments. Other colors reveal depository environments.
