The objective of the work is to determine the total percentage of organic matter in the coal deposit sediments. Such obtained data provides important information, for example, about the conditions under which the deposit originated. In practice, the information may be used in the decision-making about particular uses of the surrounding rocks as well as about the use of the raw materials. Using a variety of methods, measurements were carried out with different representatives of clastic sediments. Samples were drawn from the Saddle Member of the Karvina Formation within the Czech part of the Upper Silesian Basin.