A simple method for the determination of ice-rafted debris in sediment cores

The distribution of ice rafted debris (IRD) is an important parameter in glaciomarine sediments. A simple method is presented allowing the determination of the IRD-contents by counting the gravel fraction of the x-radiographs which are generally taken during sampling. In comparison with sieve analyses corresponding values are obtained by both methods. However, more information can be made available in a shorter time by this method.